Braskem (BAK) 20-F 13 May 21 2020 FY Annual report (foreign) Financial data

Cover

Cover	12 Months Ended
	Dec. 31, 2020shares
CoverLineItems [Line Items]
Entity Registrant Name	BRASKEM SA
Entity Central Index Key	0001071438
Document Type	20-F
Entity Incorporation, State or Country Code	D5
Document Period End Date	Dec. 31, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Title of 12(b) Security	Preferred Shares, Class A, without par value per share, each represented by American Depositary Shares
Trading Symbol	BAK
Entity a Well-known Seasoned Issuer	Yes
Entity a Voluntary Filer	No
Entity Reporting Status Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	451,668,652
ICFR Auditor Attestation Flag	true
Document Transition Report	false
Document Annual Report	true
Document Shell Company Report	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Class A preferred shares [member]
CoverLineItems [Line Items]
Entity Common Stock, Shares Outstanding	345,049,672
Class B preferred shares [member]
CoverLineItems [Line Items]
Entity Common Stock, Shares Outstanding	500,230

Statement of consolidated finan

Statement of consolidated financial position - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	R$ 13862852	R$ 6803880
Financial investments	3,627,227	1,687,504
Trade accounts receivable	4,731,979	2,285,750
Inventories	8,383,650	7,625,084
Taxes recoverable	1,192,665	1,238,011
Income tax and social contribution	1,547,916	439,933
Dividends and interest on capital	165	3,074
Prepaid expenses	344,867	115,096
Derivatives	33,769	4,712
Judicial deposits		2,571,683
Other receivables	465,154	614,827
Current assets	34,190,244	23,389,554
Non-current assets
Financial investments	15,564	9,708
Trade accounts receivable	23,229	20,901
Inventories	18,036	16,325
Taxes recoverable	1,072,737	2,257,718
Income tax and social contribution	72,267	239,847
Deferred income tax and social contribution	8,529,972	2,662,596
Judicial deposits	196,911	1,508,880
Derivatives	34,091	17,877
Other receivables	227,480	258,865
Investments	43,153	63,843
Property, plant and equipment	35,929,149	32,315,181
Intangible assets	2,828,691	2,762,088
Right of use of assets	2,902,395	2,605,654
Non-current assets	51,893,675	44,739,483
Total assets	86,083,919	68,129,037
Current liabilities
Trade payables	9,946,315	9,116,989
Borrowings	1,318,931	774,924
Braskem Idesa borrowings	7,660,128	744,408
Debentures	54,436	46,666
Derivatives	592,251	49,251
Payroll and related charges	814,566	623,723
Taxes payable	952,689	322,886
Income tax and social contribution	284,129	34,856
Dividends	5,456	6,502
Advances from customers	287,449	355,764
Leniency agreement	397,036	362,719
Sundry provisions	362,407	203,134
Other payables	466,341	930,638
Provision - geological event in Alagoas	4,349,931	1,450,476
Other financial liabilities		516,933
Lease	895,109	676,291
Current liabilities	28,387,174	16,216,160
Non-current liabilities
Trade payables	7,233	3,837
Borrowings	40,413,192	28,242,052
Braskem Idesa borrowings	4,399,110	9,237,318
Debentures	181,679	227,901
Derivatives	558,913	169,513
Taxes payable	1,370	129,353
Loan to non-controlling shareholders of Braskem Idesa	3,222,493	2,395,887
Income tax and social contribution	576,174
Deferred income tax and social contribution	1,234,398	273,036
Post-employment benefits	472,074	389,075
Advances from customers	382,478
Contingencies	1,151,087	1,151,524
Leniency agreement	1,077,314	1,379,549
Sundry provisions	511,801	302,072
Provision - geological event in Alagoas	4,825,846	1,932,591
Other payables	235,324	133,858
Lease	2,312,777	2,000,605
Non-current liabilities	61,563,263	47,968,171
Shareholders' equity
Capital	8,043,222	8,043,222
Capital reserve		232,472
Revenue reserves		1,905,255
Additional paid in capital	(488,388)	(488,388)
Other comprehensive income	(5,177,889)	(4,757,539)
Treasury shares	(49,704)	(49,724)
Accumulated losses	(4,529,547)
Total attributable to theCompany's shareholders	(2,202,306)	4,885,298
Non-controlling interest in subsidiaries	(1,664,212)	(940,592)
Shareholders' equity	(3,866,518)	3,944,706
Total liabilities and shareholders' equity	R$ 86083919	R$ 68129037

Statement of consolidated profi

Statement of consolidated profit or loss - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
IncomeStatementLineItems [Line Items]
Net revenue	R$ 58543494	R$ 52323525	R$ 57999866
Cost of products sold	(47,331,414)	(45,879,118)	(46,576,657)
Gross profit	11,212,080	6,444,407	11,423,209
Income (expenses)
Selling and distribution	(1,852,055)	(1,783,455)	(1,689,179)
(Loss) reversal for impairment of trade accounts receivable and others from clients	(55,252)	(7,069)	87,008
General and administrative	(1,918,747)	(2,224,180)	(1,793,185)
Research and development	(250,648)	(247,730)	(219,256)
Results from equity investments	(19,398)	10,218	(888)
Other income	750,749	2,408,434	1,027,222
Other expenses	(7,938,621)	(4,446,942)	(554,713)
(Loss) profit before net financial expenses and taxes	(71,892)	153,683	8,280,218
Financial results
Financial expenses	(4,913,365)	(3,882,785)	(3,007,551)
Financial income	600,184	850,554	589,052
Exchange rate variations, net	(5,298,711)	(1,724,520)	(2,256,983)
Finance income (cost)	(9,611,892)	(4,756,751)	(4,675,482)
(Loss) profit before income tax and social contribution	(9,683,784)	(4,603,068)	3,604,736
Current and deferred income tax and social contribution	2,668,478	1,962,670	(736,551)
(Loss) profit for the year	(7,015,306)	(2,640,398)	2,868,185
Attributable to:
Company's shareholders	(6,691,720)	(2,540,995)	2,827,650
Non-controlling interest in subsidiaries	(323,586)	(99,403)	40,535
(Loss) profit for the year	R$ 7015306	R$ 2640398	R$ 2868185
(Loss) earnings per share - basic and diluted - R$
Common	R$ 8.4068	R$ 3.1922	R$ 3.5543
Class A preferred shares [member]
(Loss) earnings per share - basic and diluted - R$
Common	(8.4068)	(3.1922)	3.5543
Class B preferred shares [member]
(Loss) earnings per share - basic and diluted - R$
Common	R$ 8.4068	R$ 3.1922	R$ 0.591

Statement of consolidated compr

Statement of consolidated comprehensive income - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of comprehensive income [abstract]
(Loss) profit for the year	R$ 7015306	R$ 2640398	R$ 2868185
Items that will be reclassified subsequently to profit or loss
Fair value of cash flow hedge	(600,390)	55,274	(151,718)
Income tax and social contribution - cash flow hedge	202,832	(19,805)	54,481
Fair value of cash flow hedge from jointly-controlled investee, net of taxes	1,260	(978)	(2,329)
Cash flow hedges,net of tax	(396,298)	34,491	(99,566)
Exchange variation of foreign sales hedge	(6,881,183)	(856,068)	(3,145,857)
Sales Hedge - transfer to profit or loss	2,194,059	1,385,121	1,022,782
Income tax and social contribution on exchange variation	1,593,622	(179,878)	721,845
Exchange variation of foreign sales hedge - Braskem Idesa	(445,427)	464,806	16,681
Sales Hedge - transfer to profit or loss - Braskem Idesa	471,728	267,146	236,570
Income tax on exchange variation - Braskem Idesa	(7,886)	(219,586)	(75,975)
Sales hedges,net of tax	(3,075,087)	861,541	(1,223,954)
Foreign subsidiaries currency translation adjustment	2,658,042	136,722	801,223
Total	(813,343)	1,032,754	(522,297)
Items that will not be reclassified to profit or loss
Defined benefit plan actuarial loss, net of taxes	(647)	(24,597)	(1,289)
Post-employment plans - Health plan, net of taxes		(85,031)	(280)
Long term incentive plan, net of taxes	11,214	13,921	6,406
Loss on investments		(84)	(65)
Total	10,567	(95,791)	4,772
Total comprehensive (loss) income for the year	(7,818,082)	(1,703,435)	2,350,660
Attributable to:
Company's shareholders	(7,096,912)	(1,644,368)	2,398,250
Non-controlling interest in subsidiaries	(721,170)	(59,067)	(47,590)
Total comprehensive (loss) income for the year	R$ 7818082	R$ 1703435	R$ 2350660

Statement of consolidated chang

Statement of consolidated changes in equity - BRL (R$) R$ in Thousands	Capital [member]	Capital reserve [member]	Legal reserve [member]	Tax incentive [member]	Retention of profits [member]	Additional dividends proposed [member]	Additional paid in capital [member]	Other comprehensive (loss) income [member]	Treasury shares [member]	Retained earnings [member]	Total braskem shareholders' interest [member]	Non-controlling interests in subsidiaries [member]	Total
Beginning balance at Dec. 31, 2017	R$ 8043222	R$ 232430	R$ 434142	R$ 71745	R$ 1940011	R$ 1500000	R$ 488388	R$ 5165492	R$ 49819	R$ 217550	R$ 6300301	R$ 827501	R$ 5472800
Comprehensive income for the year:
(Loss) profit for the year										2,827,650	2,827,650	40,535	2,868,185
Exchange variation of foreign sales hedge, net of taxes								(1,268,273)			(1,268,273)	44,319	(1,223,954)
Fair value of cash flow hedge, net of taxes								(112,241)			(112,241)	12,675	(99,566)
Foreign subsidiaries currency translation adjustment								946,342			946,342	(145,119)	801,223
Comprehensive income (loss) for the year								(434,172)		2,827,650	2,393,478	(47,590)	2,345,888
Equity valuation adjustments:
Realization of additional property, plant and equipment price-level restatement, net of taxes								(26,717)		26,717
Realization of deemed cost of jointly-controlled investment, net of taxes								(962)		962
Actuarial gain with post-employment benefits, net of taxes								(1,289)			(1,289)		(1,289)
Post-employment benefits - health plan, net of taxes								(280)			(280)		(280)
Long term incentive plan, net of taxes								6,406			6,406	133	6,539
Fair value adjustments of trade accounts receivable, net of taxes								(449)			(449)		(449)
Equity valuation adjustments								(23,291)		27,679	4,388	133	4,521
Contributions and distributions to shareholders:
Prescribed dividend										460	460		460
Additional dividends approved in the board meeting						(1,500,000)				(73)	(1,500,073)	(1,396)	(1,501,469)
Reversal of fiscal incentive				(130)						130
Tax incentive reserve				81,863						(81,863)
Legal reserve			143,334							(143,334)
Mandatory minimum dividends										(667,419)	(667,419)		(667,419)
Additional dividends proposed						2,002,255				(2,002,255)
Loss on investments								(65)			(65)	65
Sale of investiments												(111)	(111)
Contributions and distributions to shareholders			143,334	81,733		502,255		(65)		(2,894,354)	(2,167,097)	(1,442)	(2,168,539)
Ending balance at Dec. 31, 2018	8,043,222	232,430	577,476	153,478	1,940,011	2,002,255	(488,388)	(5,623,020)	(49,819)	(256,575)	6,531,070	(876,400)	5,654,670
Comprehensive income for the year:
(Loss) profit for the year										(2,540,995)	(2,540,995)	(99,403)	(2,640,398)
Exchange variation of foreign sales hedge, net of taxes								733,449			733,449	128,092	861,541
Fair value of cash flow hedge, net of taxes								38,919			38,919	(4,428)	34,491
Foreign subsidiaries currency translation adjustment								220,228			220,228	(83,506)	136,722
Comprehensive income (loss) for the year								992,596		(2,540,995)	(1,548,399)	(59,245)	(1,607,644)
Equity valuation adjustments:
Realization of additional property, plant and equipment price-level restatement, net of taxes								(26,717)		26,717
Realization of deemed cost of jointly-controlled investment, net of taxes								(883)		883
Actuarial gain with post-employment benefits, net of taxes								(109,492)			(109,492)	(136)	(24,597)
Post-employment benefits - health plan, net of taxes													(85,031)
Long term incentive plan, net of taxes								13,573			13,573	348	13,921
Fair value adjustments of trade accounts receivable, net of taxes								15			15		15
Exchange variation in hyperinflationary economy, net of taxes								(3,561)			(3,561)		(3,561)
Equity valuation adjustments								(127,065)		27,600	(99,465)	212	(99,253)
Contributions and distributions to shareholders:
Absorption of losses					(2,767,965)					2,767,965
Prescribed dividend										2,005	2,005		2,005
Incentive long term plan payments with treasury shares									95		95		95
Retention of profits - non-approval of additonal dividends					2,002,255	(2,002,255)
Additional dividends of subsidiary												(5,125)	(5,125)
Loss on interest in subsidiary								(50)			(50)	(34)	(84)
Gain on transfer of shares in custody long term incentive plan		42									42		42
Contributions and distributions to shareholders		42			(765,710)	R$ 2002255		(50)	95	2,769,970	2,092	(5,159)	(3,067)
Ending balance at Dec. 31, 2019	8,043,222	232,472	577,476	153,478	1,174,301		(488,388)	(4,757,539)	(49,724)		4,885,298	(940,592)	3,944,706
Comprehensive income for the year:
(Loss) profit for the year										(6,691,720)	(6,691,720)	(323,586)	(7,015,306)
Exchange variation of foreign sales hedge, net of taxes								(3,079,691)			(3,079,691)	4,604	(3,075,087)
Fair value of cash flow hedge, net of taxes								(390,608)			(390,608)	(5,690)	(396,298)
Foreign subsidiaries currency translation adjustment								3,054,126			3,054,126	(396,084)	2,658,042
Comprehensive income (loss) for the year								(404,544)		(6,691,720)	(7,096,264)	(721,171)	(7,817,435)
Equity valuation adjustments:
Realization of additional property, plant and equipment price-level restatement, net of taxes								(26,302)		26,302
Realization of deemed cost of jointly-controlled investment, net of taxes								(741)		741
Actuarial gain with post-employment benefits, net of taxes								(648)			(648)	1	(647)
Long term incentive plan, net of taxes								11,629			11,629	(415)	11,214
Fair value adjustments of trade accounts receivable, net of taxes								113			113		113
Exchange variation in hyperinflationary economy, net of taxes								8,077			8,077		8,077
Other								3,695		(3,695)
Equity valuation adjustments								(15,806)		23,348	7,542	1	7,543
Contributions and distributions to shareholders:
Prescribed dividend										1,110	1,110		1,110
Additional dividends approved in the boar meeting												(2,450)	(2,450)
Absorption of losses		(232,460)	(577,476)	(153,478)	(1,174,301)					2,137,715
Gain on transfer of shares in custody long term incentive plan		(12)							20		8		8
Contributions and distributions to shareholders		R$ 232472	R$ 577476	R$ 153478	R$ 1174301				20	2,138,825	1,118	(2,450)	(1,332)
Ending balance at Dec. 31, 2020	R$ 8043222						R$ 488388	R$ 5177889	R$ 49704	R$ 4529547	R$ 2202306	R$ 1664212	R$ 3866518

Statement of consolidated cash

Statement of consolidated cash flows - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of cash flows [abstract]
(Loss) profit before income tax and social contribution	R$ 9683784	R$ 4603068	R$ 3604736
Adjustments for reconciliation of profit
Depreciation and amortization	4,048,081	3,632,265	2,990,577
Results from equity investments	19,398	(10,218)	888
Interest foreign exchange gain/losses	10,457,272	4,145,110	6,013,944
Reversal of provisions	336,838	320,439	23,725
Provision - geological event in Alagoas	6,901,828	3,383,067
PIS and COFINS credits - exclusion of ICMS from the calculation basis	(310,557)	(1,904,206)	(519,830)
(Loss) reversal for impairment of trade accounts receivable and others from clients	55,252	7,069	(87,008)
Provision for losses and write-offs of long-lived assets	8,794	225,204	72,470
Adjustments for reconciliation of profit	11,833,122	5,195,662	12,099,502
Changes in operating working capital
Judicial deposits - other financial assets	3,746,107	(3,680,460)
Financial investments	(1,860,827)	797,445	98,349
Trade accounts receivable	(2,187,826)	895,046	223,418
Inventories	(252,534)	867,817	(1,537,290)
Taxes recoverable	1,532,554	1,195,427	1,022,242
Prepaid expenses	293,785	202,732	(105,163)
Other receivables	397,103	(273,665)	(248,988)
Trade payables	(3,001,564)	282,445	1,343,375
Taxes payable	449,761	(569,793)	(977,248)
Advances from customers	198,988	197,965	(199,958)
Leniency agreement	(349,842)	(341,605)	(330,006)
Sundry provisions	(145,355)	(215,548)	(116,458)
Other payables	(1,366,118)	362,203	833,227
Cash generated from operations	9,287,354	4,915,671	12,105,002
Interest paid	(2,736,821)	(2,238,445)	(1,916,801)
Income tax and social contribution paid	(257,542)	(411,951)	(937,831)
Net cash generated from operating activities	6,292,991	2,265,275	9,250,370
Proceeds from the sale of fixed and intangible assets	33,140	12,590	95,133
Proceeds from the sale of investments			81,000
Funds received in the investments' capital reduction			2,254
Dividends received	4,822	3,513	41,791
Acquisitions to property, plant and equipment and intangible assets	(2,759,789)	(2,682,522)	(2,706,328)
Premium in the dollar put option			(2,167)
Net cash used in investing activities	(2,721,827)	(2,666,419)	(2,488,317)
Short-term and Long-term debt
Acquired	13,049,459	20,586,103	4,301,626
Payments	(8,734,505)	(17,425,409)	(6,592,197)
Braskem Idesa borrowings
Acquired		3,497,622
Payments	(905,210)	(4,398,453)	(812,929)
Payment loan to non-controlling shareholders of Braskem Idesa	(37,618)
Lease	(662,068)	(454,190)
Dividends paid	(2,380)	(668,904)	(1,499,900)
Other financial liabilities	(534,456)	499,999
Net cash generated (used) in financing activities	2,173,222	1,636,768	(4,603,400)
Exchange variation on cash of foreign subsidiaries	1,314,586	20,619	(386,109)
Increase in cash and cash equivalents	7,058,972	1,256,243	1,772,544
Represented by
Cash and cash equivalents at the beginning of the year	6,803,880	5,547,637	3,775,093
Cash and cash equivalents at the end of the year	13,862,852	6,803,880	5,547,637
Increase in cash and cash equivalents	R$ 7058972	R$ 1256243	R$ 1772544

1 Operations

1 Operations	12 Months Ended
	Dec. 31, 2020
Operations
Operations	1 Operations Braskem S.A. is a public corporation headquartered in Camaçari, Bahia (“BA”), which, jointly with its subsidiaries (hereinafter referred to as “Braskem” or “Company”), is controlled by Novonor S.A. (“Novonor”, previously named Odebrecht S.A.), which directly and indirectly holds interests of 50.11% and 38.32% in its voting and total capital, respectively. The Company’s shares are traded on B3 S.A. Brasil, Bolsa, Balcão (“B3”), under the tickers BRKM3, BRKM5 and BRKM6, and on the New York Stock Exchange (“NYSE”) under the ticker BAK. Braskem also is engaged in the manufacture, sale, import and export of chemicals, petrochemicals and fuels, the production, supply and sale of utilities such as steam, water, compressed air and industrial gases, as well as the provision of industrial services and the production, supply and sale of electric energy for its own use and use by other companies. Braskem also invests in other companies, either as equity method investees or associates. The Company has industrial plants in Brazil, the United States, Germany, and Mexico. The units produce thermoplastic resins, namely polyethylene (“PE”) and polypropylene (“PP”), polyvinyl chloride (“PVC”), as well as basic petrochemicals. On December 31, 2020, the consolidated statement of financial position presented positive net working capital (defined as total current assets less total current liabilities) of R$5.8 billion and negative shareholders’ equity of R$3.9 billion, mainly due to exchange variation effects from the depreciation in the Brazilian Real against the U.S. dollar (Note 2.2.c) and to the provision for the geological event in Alagoas (Note 26). The Company presented cash flow generated from operating activities of R$9,287,354 for the year ended December 31, 2020. Most of the credit facilities are long-term, with 96% of the total debt denominated in U.S. dollar, in line with the Company’s Financial Policy. During periods in which the Brazilian Real depreciates significantly against the U.S. dollar, the Company is subject to an adverse effect from exchange variation on its debt. On the other hand, the depreciation in the Brazilian Real against the U.S. dollar has a positive effect on the Company’s cash generation, which manages the exposure against the debt position concentrated in U.S. dollar. In 2020, the Brazilian Real depreciated by 29% in relation to the U.S. dollar. The exchange variation losses recognized in 2020 will impact the cash flow in the liabilities’ maturity date, which is concentrated in the long term. Due to Braskem’s debt profile, this negative impact does not pose any risk to Company’s liquidity position for at least 12 months after the balance sheet date. Opening of the new plant in the United States In September 2020, the Company concluded the commissioning process following applicable safety standards and started commercial polypropylene production at its new plant in the United States. Located in the city of La Porte, and with production capacity of 450,000 tons per year ( unaudited) Braskem Idesa operations On December 2, 2020, the subsidiary Braskem Idesa (“BI”) was notified by the National Natural Gas Control Center ("Cenagas"), the Mexican government agency responsible for the natural gas pipeline and transportation system in the region, regarding the unilateral suspension of natural gas transportation, an energy input essential to produce polyethylene at the Petrochemical Complex in Mexico. As a result, and respecting the safety protocols, Braskem Idesa immediately suspended its operational activities. On January 7, 2021, Braskem Idesa partially resumed operations of polyethylene production based on an experimental business model, that follows all safety protocols, in order to attend the demand from Mexico’s plastics industry. In addition, Braskem Idesa has taken legal measures as established in the Ethane Supply Agreement entered into between BI and PEMEX. Braskem Netherlands B.V., the direct parent company of BI, also has taken legal actions based on the applicable international rules to protect the rights and to ensure the performance of all legal obligations and also seeking to protect its investment in Mexico. Such measures provide for a remediation and negotiation period in which the parties seek a solution. On March 1, 2021, disclosed in Not 37(e), Braskem Idesa entered into the following agreements to enable it to continue its operations: (i) a memorandum of understanding with PEMEX Transformación Industrial and PEMEX Exploración y Producción (“PEMEX”) setting out certain understandings regarding potential amendments to the ethane supply agreement and the development of an ethane import terminal, subject to further negotiation, a definitive agreement and approval by Braskem Idesa’s shareholders and creditors; and (ii) a natural gas transport service agreement with Centro Nacional de Control del Gas Natural (“Cenagas”) for 15 years, which is conditioned upon the execution of the definitive agreement referenced in item (i) above. Following the execution of these agreements by Braskem Idesa, it resumed receiving natural gas transportation services from Cenagas. The existing ethane supply agreement between Braskem Idesa and Pemex has not been modified and remains in place. At this time, Braskem Idesa is unable to predict the outcome of ongoing discussions with Pemex TRI, its shareholders, and creditors. Braskem Idesa assessed its going concern assumptions and concluded to be able to realize its assets and settlle its liabilities in the normal course of business. As required by the accounting standards, impairment analysis have been performed As a result, the carrying amount of property plant and equipment do not exceed its recoverable amount on December 31, 2020.

2 Accounting policies

2 Accounting policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies
Accounting policies	2 Accounting policies The main accounting policies applied when preparing the financial statements are described in the respective notes. Except for adopting IFRS 16 Leases and IFRIC 23 Uncertainty over Income Tax Treatments on January 1, 2019, the Company has consistently applied the accounting policies to all periods presented in these consolidated financial statements. 2.1 Basis of preparation and statement of compliance The consolidated financial statements have been prepared under the historical cost convention and were adjusted, when required, to reflect the fair value of assets and liabilities. The preparation of financial statements requires the use of certain estimates. It also requires Management to exercise its judgment in the process of applying the Company’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the financial statements are disclosed in Note 3. The issue of these financial statements was authorized by the Executive Board on May 13, 2021. 2.1.1 Consolidated financial statements The consolidated financial statements were prepared and presented in accordance with the International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”). (a) List of subsidiaries The consolidated information comprises the financial statements of the Braskem S.A. and the following entities: Total and voting interest - % Headquarters 2020 2019 2018 Direct and Indirect subsidiaries BM Insurance Company Limited ("BM Insurance") Bermuda 100.00 100.00 100.00 Braskem America Finance Company ("Braskem America Finance") EUA 100.00 100.00 100.00 Braskem America, Inc. (“Braskem America”) EUA 100.00 100.00 100.00 Braskem Argentina S.A. (“Braskem Argentina”) Argentina 100.00 100.00 100.00 Braskem Europe GmbH ("Braskem Alemanha") Germany 100.00 100.00 100.00 Braskem Finance Limited (“Braskem Finance”) Cayman Islands 100.00 100.00 100.00 Braskem Idesa S.A.P.I. ("Braskem Idesa") Mexico 75.00 75.00 75.00 Braskem Idesa Servicios S.A. de CV ("Braskem Idesa Serviços") Mexico 75.00 75.00 75.00 Braskem Incorporated Limited ("Braskem Inc") Cayman Islands 100.00 100.00 100.00 Braskem India Private Limited ("Braskem India") (i) Índia 100.00 Braskem Mexico Proyectos S.A. de C.V. SOFOM ("Braskem México Sofom") Mexico 100.00 100.00 100.00 Braskem Mexico, S. de RL de CV ("Braskem México") Mexico 100.00 100.00 100.00 Braskem Mexico Servicios S. RL de CV ("Braskem México Serviços") Mexico 100.00 100.00 100.00 Braskem Netherlands B.V. ("Braskem Holanda") Netherlands 100.00 100.00 100.00 Braskem Netherlands Finance B.V. (“Braskem Holanda Finance”) Netherlands 100.00 100.00 100.00 Braskem Netherlands Inc. B.V. (“Braskem Holanda Inc”) Netherlands 100.00 100.00 100.00 Braskem Petroquímica Chile Ltda. (“Braskem Chile”) Chile 100.00 100.00 100.00 Cetrel S.A. ("Cetrel") Brazil 63.70 63.70 63.66 Distribuidora de Água Camaçari S.A. ("DAC") Brazil 63.70 63.70 63.66 Lantana Trading Co. Inc. (“Lantana”) Bahamas 100.00 100.00 100.00 Specific Purpose Entity ("SPE") Fundo de Investimento Caixa Júpiter Multimercado Brazil 100.00 100.00 100.00 Fundo de Investimento Santander Netuno Multimercado Longo Prazo ("FIM Netuno") Brazil 100.00 100.00 100.00 (i) Subsidiary incorporated in May 2020. 2.2 Functional and foreign currency (a) Functional and presentation currency The functional currency of the Company is the Real. The presentation currency is also Real. All amounts have been rounded to the nearest thousand, unless otherwise indicated. (b) Functional currency other than the Brazilian Real Transactions in foreign currencies are translated into the respective functional currency of the Braskem’s entities at the exchange rates on the transaction dates. Monetary assets and liabilities denominated and measured in foreign currency on the reporting date are re-translated into the functional currency at the exchange rate on said date. Non-monetary assets and liabilities measured at fair value in foreign currency are re-translated into the functional currency at the exchange rate on the date on which the fair value was determined. Non-monetary items that are measured based on the historical cost in foreign currencies are translated at the exchange rate on the date of the transaction. The differences in foreign currencies resulting from conversion are generally recognized in the profit or loss. Assets and liabilities from foreign operations are translated into Brazilian Real at the exchange rates determined on the reporting date. Revenues and expenses from foreign operations are translated into Brazilian Real at the exchange rates determined on the transaction dates. Differences in foreign currencies generated by translation into the reporting currency are recognized in other comprehensive income and accrued in asset valuation adjustments in equity. The results and financial position of an entity whose functional currency is not the currency of a hyperinflationary economy must be translated into the reporting currency. The assets and liabilities for each statement of financial position reported (including the comparative balance sheets) must be translated using the closing quote of the exchange rate on the respective reporting dates, and the income and expenses for each comprehensive statement of operations or statement of operations reported (including comparative statements) must be translated using the exchange rates in effect on the transaction dates. All exchange variation gains and losses must be recognized in other comprehensive income. The subsidiaries with a functional currency different from that of the Braskem S.A. are listed below: Functional currency Subsidiaries Braskem Alemanha Euro BM Insurance, Braskem America, Braskem America Finance, Braskem Holanda, U.S.dollar Braskem Idesa, Braskem Idesa Serviços, Braskem México and Braskem México Serviços Mexican peso Braskem Argentina Argentinean peso Braskem Chile Chilenean peso Braskem India Rupee (c) Exchange variation effects The effects from exchange variation on the Company’s transactions are mainly due to the variations in the following currencies: End of period rate at December 31 Average rate Variation 2020 2019 Variation 2020 2019 2018 2020-2019 2019-2018 U.S. dollar - Brazilizan real 5.1967 4.0307 28.93% 5.1578 3.9461 3.6558 30.70% 7.94% Euro - Brazilizan real 6.3779 4.5305 40.78% 5.8989 4.4159 4.3094 33.58% 2.47% Mexican peso - Brazilizan real 0.2610 0.2134 22.31% 0.2402 0.2049 0.1901 17.22% 7.80% U.S. dollar - Mexican peso 19.9240 18.8858 5.50% 21.5098 19.2568 19.2363 11.70% 0.11% U.S. dollar - Euro 0.8166 0.8926 -8.52% 0.8775 0.8930 0.8471 -1.74% 5.42% (d) Hyperinflationary economy Non-monetary assets and liabilities, Equity and the statement of income of subsidiaries operating in highly inflationary economies are adjusted by the change in the Consumer Price Index of the currency. The non-monetary assets and liabilities recorded at historical cost and the Equity and the results of the subsidiary in Argentina were updated for inflation. The impacts of changes in general purchasing power are reported as finance costs in the statements of profit or loss. 2.3 Consolidation 2.3.1 Business combinations Business combinations are recognized using the acquisition method when control is transferred to the Company. The consideration transferred generally is measured at fair value, as is the identifiable net assets acquired. Any goodwill arising from the transaction is tested annually for impairment loss. Gains on bargain purchase are immediately recognized in the profit or loss. Transaction costs are recognized into the result as incurred, except any costs associated with issuances of debt or equity instruments. Any contingent consideration payable is measured at its fair value on the acquisition date. If the contingent consideration is classified as an equity instrument, it is not remeasured, and the settlement is recognized in equity. Other contingent considerations are remeasured at fair value on each reporting date and subsequent changes to fair value are recognized in the income statement for the fiscal year. 2.3.2 Subsidiaries The Company controls an entity when it is exposed to, or entitled to, the variable returns originating from its involvement with the entity and has the capacity to affect such returns by exercising its power over the entity. The financial statements of subsidiaries are included in the consolidated financial statements as from the date the Company obtains control until the date of the loss of control. 2.3.3 Equity method Investees The Company’s investments in entities with accounting treatment using the equity method consist of their interests in associates. Associates are those in which the Company, directly or indirectly, has significant influence, but not control or joint control, over the financial and operating policies. A joint venture is an arrangement in which the Company has joint control, whereby the Company has rights to the net assets of the arrangement, rather than rights to its assets and obligations for its liabilities. Interests in associates and the joint venture are accounted for using the equity method. They are initially recognized at cost, which includes transaction costs. Subsequent to initial recognition, the consolidated financial statements include the Company’s share of the profit or loss and other comprehensive income of equity-accounted investees, until the date on which significant influence or joint control ceases to exist. 2.3.4 Transactions eliminated in consolidation Intragroup balances and transactions and any unrealized revenues or expenses arising from intragroup transactions are eliminated. Unrealized gains originating from transactions with investees recorded using the equity method are eliminated against the investment proportionately to the Company’s interest in the investee. Unrealized losses are eliminated in the same way as unrealized gains, but only to the extent that there is no evidence of impairment loss. 2.4 New or revised pronouncements New accounting standards currently in force: - Rental concessions related to COVID-19 (amendments to IFRS 16). - Definition of a Business (amendments to IFRS 3). - Definition of Material (amendments to IAS 1 and IAS 8). - Interest Rate Benchmark Reform (amendments to IFRS 9, IAS 39, and IFRS 7). The Company had no significant impact on its financial statements due to such amendments. Additionally, a series of new standards are effective for annual periods beginning after January 1, 2020. The Company did not early adopt these standards in the preparation of these financial statements. The following new or amended standards are not expected to have a significant impact on the Company’s financial statements: - Onerous Contracts: costs of fulfilling a contract (amendments to IAS 37). - Property, Plant and Equipment: revenue before intended use (amendments to IAS 16). - Reference to the Conceptual Framework (amendments to IFRS 3). - Classification of Liabilities as Current or Non-Current (amendments to IAS 1). - Annual improvements to IFRS Standards 2010-2020. - Interest Rate Benchmark Reform – Phase 2 (amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16). The amendments address issues that might affect financial reporting as a result of the reform of an interbank offered rate (IBORs), including the effects of changes to contractual cash flows or hedging relationships arising from the replacement of an interest rate benchmark with an alternative benchmark rate. The amendments provide practical relief for certain requirements in IFRS 9, IAS 39, IFRS 7, IFRS 4, and IFRS 16 relating to: (i) changes in the basis for determining contractual cash flows of financial assets, financial liabilities, and lease liabilities; and (ii) hedge accounting. (i) change in the basis for determining contractual cash flows The amendments will require an entity to account for a change in the basis for determining the contractual cash flows of a financial asset or financial liability that is required by interest rate benchmark reform by updating the effective interest rate of the financial asset or financial liability. At December 31, 2020, the Company had loans whose interest rates are based on LIBOR, as disclosed in Note 16, and will be subject to IBOR reform. The Company expects that the benchmark interest rate of these loans will be changed to Security Overnight Financing Rate (“SOFR”) until 2023. (ii) Hedge accounting The amendments provide exceptions to the hedge accounting requirements in the following areas: - Allow amendment of the designation of a hedging relationship to reflect the changes required by the reform. - When a hedged item in a cash flow hedge is amended to reflect the changes required by the reform, the amount accumulated in the cash flow hedge reserve is deemed to be based on the alternative benchmark interest rate applied to the hedged item. At December 31, 2020, the Company has cash flow hedges based on LIBOR. The Company expects that indexation of the hedged items and hedging instruments to sterling LIBOR will be replaced by Sterling Overnight Interbank Average Rate (“SONIA”) in 2021 (refer to note 4.1). Whenever the replacement occurs, the Company expects to apply the amendments relating to hedge accounting. However, there are uncertainties as to how and when a replacement may occur. The Company does not expect the amounts accumulated in the cash flow hedge reserve will be reclassified immediately to the profit or loss due to the transition to IBOR. (iii) Disclosures The amendments will require the Company to disclose additional information on the entity’s exposure to risks arising from the interest rate benchmark reform and the related risk management activities. (iv) Transition The Company plans to apply the amendments from January 1, 2021. The adoption will not affect the amounts reported for 2020 or prior periods. 2.5 Main measures and impacts due to COVID-19 Braskem has been closely monitoring the impacts from the COVID-19 pandemic on its business and surrounding communities. Braskem has formed a crisis committee to establish global procedures focusing mainly on the health and safety of people and the continuity of its operations. Updates on the measures taken by the Company follow: (i) Determining that all team members and contractors from the Company vulnerable to COVID-19 work remotely until the last phase of return; (ii) Determining that all team members and contractors not directly related to the safe continuity of operations work remotely until the criteria for the start of flexible measures for a safe return are met; (iii) Reducing the number of team members and contractors working on its industrial assets, with operations using the smallest possible teams, while considering all rules for ensuring personal safety and maintaining operational reliability; (iv) Restricting visits by non-routine third parties and suppliers to Braskem’s facilities; (v) Creating agendas jointly with clients and local communities to verify if there are products in its portfolio to help combat the pandemic; (vi) Creating, implementing, and monitoring the indicators of the Plan for Safe Return to Braskem plants and offices. The capacity utilization rates of Brazilian and North American plants reduced in the second quarter of 2020 due to the weaker demand for our products and the destocking trend in the petrochemical and plastics production chain. The demand for resins increased in the third quarter of 2020; therefore, both regions' capacity utilization rates returned to normal levels and kept similar levels up to the end of the year. In Europe and Mexico, the capacity utilization rates returned to their normal levels in the second quarter, following the gradual recovery in demand, resulting in capacity utilization rates of 83% and 80%, respectively. As disclosed in note 1, operational activities in Mexico were termporarilly interrupted in December. With regard to the fourth quarter, despite the recovery in demand begun in the previous quarter, the capacity utilization rate in Europe was 64% due to the scheduled shutdown. During 2020, the Company adopted cash-preservation measures to ensure the financial stability and resilience of its business, which include: • Drawing down a revolving credit facility in the amount of US$1 billion (R$5.2 billion) in April 2020, which comes due in 2023. At the end of July 2020, the Company prepaid the facility in full, in an amount corresponding to R$5.5 billion; • Issuing bonds in the international market by the subsidiary Braskem Holanda, in July 2020, in the amount of US$600 million (R$3.2 billion); • Reducing fixed costs by approximately 9% compared to the same period of 2019; • Reducing the investments planned for 2020 from US$721 million (R$3.9 billion) to US$555 million (R$2.8 billion); • Postponing the payment of social contribution charges in Brazil; and • Optimizing working capital. The Company also highlights the actions carried out jointly with its clients and partner companies to transform chemicals and plastic resins into items that are essential for combatting COVID-19, which include surgical masks, packaging for liquid and gel alcohol, bleach and 3D printing of bands for protective face shields; donations of LPG (cooking gas) to field hospitals; actions to support the chain of clients and suppliers, particularly small and midsized companies; and donations of hygiene kits and food staples to local communities. The Company’s Management reviewed the accounting estimates for the realization of assets, including the estimates for losses on trade accounts receivables, inventory impairment loss, deferred tax assets and other assets, or those related to the provision for liabilities in the financial statements given the significant changes in the risks to which the company is exposed (see more information in note 20.6). The review considered events after the reporting period that occurred up to the reporting date of these financial statements, and no significant effects were identified that should be reflected in the financial statements for the fiscal year ended December 31, 2020. Due to the uncertainties arising from the COVID-19 pandemic with regard to the global economy, it is impossible to accurately predict the adverse impacts on the equity and financial position of the Company and its subsidiaries after the reporting date. With the recovery in demand for resins, the Company has no expectations of additional provisions for impairment testing of its assets in the near future arising from a scenario of demand constraints.

3 Application of critical estim

3 Application of critical estimates and judgments	12 Months Ended
	Dec. 31, 2020
Application Of Critical Estimates And Judgments
Application of critical estimates and judgments	3 Application of critical estimates and judgments Critical estimates and judgments are those that require the most difficult, subjective or complex judgments by management, usually as a result of the need to make estimates that affect issues that are inherently uncertain. Estimates and judgments are continually reassessed and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances. Actual results can differ from planned results due to differences in the variables, assumptions or conditions used in making estimates. Estimates and assumptions are continuously revised. Changes in estimates are recognized prospectively. Actual results may differ from such estimates. 3.1 Judgments Information about judgements made in applying accounting policies that have the most significant effects on the amounts recognized in the financial statements include the following: (a) Note 14.b - Lease term (b) Useful life of assets The Company recognizes the depreciation and amortization of its property, plant and equipment (“tangible assets”) and intangible assets with estimated useful life approved by the Company’s technicians with experience managing Braskem’s plants. The useful lives of assets are reviewed at each reporting date by the Company’s technicians. The main factors that are taken into consideration in the definition of the useful life of the assets that compose the Company’s industrial plants are the information of manufacturers of machinery and equipment, level of the plants’ operations, quality of preventive and corrective maintenance and the prospects of technological obsolescence of assets. The useful lives applied to the assets determined the following average (%) depreciation and amortization rates, using the straight-line method: 2020 2019 Buildings and improvements 2.82 6.23 Machinery, equipment and installations 6.31 7.04 Furniture and fixtures 10.03 10.02 IT equipment 20.23 20.60 Lab equipment 9.57 9.52 Security equipment 9.54 9.39 Vehicles 18.89 18.88 Other 13.55 15.72 Information on property, plant and equipment is presented in Note 12. 3.2 Uncertainties on assumptions and estimates The information on uncertainties related to the assumptions and estimates at December 31, 2020 with significant risk of resulting in a significant adjustment to the accounting balances of assets and liabilities in the following fiscal year are as follows: 3.2.1 Deferred income tax (“IR”) and social contribution (“CSL”) The recognition and the amount of deferred tax assets depend on the generation of future taxable income, which requires the use of an estimate related to the Company’s future performance. These estimates are included in the business plan, which is annually prepared by the Executive Board. This plan uses as main variables projections for the price of the products manufactured by the Company, price of inputs, growth of the gross domestic product of each country where the Company operates, exchange variation, interest rate, inflation rate and fluctuations in the supply and demand of inputs and finished products. In evaluating the plan, the Company uses its historical performance, strategic planning and market projections produced by specialized third party consulting firms, which are reviewed and supplemented based on Management’s experience. Information on deferred income tax and social contribution is presented in Note 22(c). 3.2.2 Impairment test and analysis (a) Tangible and intangible assets with definite useful lives Annually, or whenever it is necessary, the Company reviews the carrying amounts of its tangible and intangible assets with definite useful lives to determine whether there is any indication of impairment. If any such indication exists, then the asset’s recoverability amount is estimated. This analysis is conducted to assess the existence of scenarios that could adversely affect its cash flow and, consequently, its ability to recover the investment in such assets. These scenarios arise from issues of a macroeconomic, legal, competitive, or technological nature. Some significant and notable aspects considered by the Company in this analysis include: (i) the possibility of an oversupply of products manufactured by the Company or of a significant reduction in demand due to adverse economic factors; (ii) the prospects of material fluctuations in the prices of products and inputs; (iii) the likelihood of the development of new technologies or raw materials that could materially reduce production costs and consequently impact sales prices, ultimately leading to the full or partial obsolescence of the industrial facilities of the Company; and (iv) changes in the general regulatory environment that make the production process of Braskem infeasible or that significantly impact the sale of its products. For this analysis, the Company maintains an in-house team with a strategic vision of the business. If the aforementioned variables indicate any material risk to cash flows, the Management of Braskem conducts impairment tests in accordance with Note 3.2.2(b). For impairment testing, assets are grouped together into the smallest group of assets that generates cash inflows from continuing use that are largely independent of the cash inflows of other assets or CGUs (“Cash Generating Units”). The impairment value of an asset or CGU is the greatest of the value in use and its fair value less sales costs. The value in use is based on estimated future cash flows, discounted to present value using a discount rate before tax that reflects the current market assessments of the time value of money and the specific risks related to the asset or CGU. When identifying whether cash inflows from an asset (or group of assets) are largely independent of cash inflows from other assets (or groups of assets), the Company considers several factors, such as: product lines, individual locations and the way Management monitors and makes decisions about the going-concern analysis. (b) Intangible assets with indefinite useful lives The balances of goodwill arising from business combinations are tested for impairment once a year. Goodwill from business combination is allocated to the CGUs or groups of CGUs that are expected to benefit from the synergies of the combination. These tests are based on the projected cash flow in each CGU or groups of CGUs, which are extracted from the business plan of the Company for a five-year period, mentioned in Note 3.2.1, and the Management plan for a period greater than 5 years to reflect industry cycle patterns, in a total projection period of 10 years. Perpetuity is also calculated based on the long-term vision and excluding real growth. Cash flows and perpetuity are adjusted to present value at a discount rate based on the Weighted Average Cost of Capital (“WACC”). Goodwill and results of impairment tests are presented in Note 13(a) and (b). (c) Impairment loss Impairment loss is recognized in profit or loss if the book value of the asset or CGU exceeds its impairment value. Recognized losses related to assets or CGUs are initially allocated for the reduction of any goodwill allocated, and then for reduction of the book value of other assets of the CGU (or group of CGUs) on a pro rata basis. Impairment losses related to goodwill are not reversed. In the case of other assets, impairment losses are reversed only to the extent that the new book value of the asset does not exceed the book value that would have been calculated, net of depreciation or amortization, if the impairment loss had not been recognized. 3.2.3 Provisions and contingencies Provisions are recorded when there is a present obligation (legal or constructive) as a result of a past event, and it is more likely than not that an outflow of resources will be required to settle the obligation. Contingent liabilities are mainly related to discussions in the judicial and administrative spheres arising from primarily labor, corporate claims, civil and tax lawsuits. The Management of Braskem, based on its assessment and of its external legal advisors, classifies these proceedings in terms of probability of loss as follows: (i) Probable loss – present obligation for which there is a higher probability of loss than of a favorable outcome; (ii) Possible loss – present obligation for which the possibility of loss is greater than remote and less than probable. For these claims, the Company does not recognize a provision and discloses the most significant matters in Note 24.2. The provision for labor, corporate claims, civil and tax lawsuits correspond to the value of the claims plus interests by the estimated value of probable losses. On the acquisition date in business combination operations, a contingent liability is recorded when it represents a present obligation. The Company’s management believes that the estimates related to the outcome of the proceedings and the possibility of future disbursement may change in view of the following: (i) higher courts may decide in a similar case involving another company, adopting a final interpretation of the matter and, consequently, advancing the termination of the proceeding involving the Company, without any disbursement or without implying the need of any financial settlement of the proceeding; and (ii) programs encouraging the payment of the debts implemented in Brazil at the Federal and State levels, in favorable conditions that may lead to a disbursement that is lower than the one that is recognized in the provision or lower than the value of the matter. The Company’s contingencies are presented in Note 24. 3.2.4 Provision of expenses – Geological event in Alagoas The provision recorded stems from the actions and measures relating to the geological phenomenon in Alagoas, which consider, among its main factors, the dealings of safety of people and the affected districts, the recovery of areas potentially affected by the geological event and discussions with the competent authorities as Terms of Agreements, disclosed in Note 26. The amount of the provision could be affected materially by uncertainties relating to the geological phenomenon in Maceió, which include: actions to close and monitor wells, future studies by experts, changes related to the dynamics of the geological event, studies and the implementation of socio-environmental and urbanistic measures, implementation of the relocation program for risk areas and individual lawsuits, demands from public service concessionaires, any adherence by the municipality of Maceió and other entities to the Agreement for Socio-Environmental Reparation, as detailed in Note 26. 3.2.5 Provision for recovery of environmental damages The provision for environmental liabilities is estimated based on current legal and constructive requirements, technology, price levels and expected remediation plans. Realized costs and cash outflows may differ from current estimates due to the changes in laws and regulations, public expectations, prices, new findings by the ongoing studies and analysis of local conditions and changes in remediation technologies. The time and value of future expenses related to environmental liabilities are reviewed annually, as well as the interest rate used for discounting to present value. The environmental liabilities are presented in Note 23 (a). 3.2.6 Financial instruments (a) Fair value of derivative and non-derivative financial instruments The Company recognizes derivative financial instruments at their fair value and the main sources of information are the stock exchanges, commodities and futures markets, disclosures of the Central Bank of Brazil and quotation services such as Bloomberg and Reuters. Nevertheless, the volatility of the foreign exchange and interest rate markets in Brazil has been resulting in significant changes in future rates and interest rates over short periods of time, leading to significant changes in the fair value of swaps and other financial instruments. The fair values of non-derivative quoted financial instruments are based on current bid prices. If the market for a financial asset and for unlisted securities is not active, the Company establishes fair value by using valuation techniques. These include the use of recent arm’s length transactions, reference to other instruments that are substantially the same, discounted cash flow analysis, and option pricing models that make maximum use of market inputs and rely as little as possible on information provided by the Company’s Management. Information on derivative and non-derivative financial instruments is presented in Note 20. (b) Hedge accounting The Company designated non-derivate financial liabilities in foreign currency to hedge the future cash flows generated by its exports. This decision was based on two important concepts and judgments: (i) the high probability of performing exports according to its business plan, which are inherent to the market and business where it operates, and (ii) the ability of the Company to refinance its liabilities in U.S. dollar, since the priority financing in U.S. dollar is part of the Company’s guidelines and strategy and the maintenance of a minimum level of net liabilities in U.S. dollar is envisaged in the Financial Policy of the Company. The subsidiary Braskem Idesa designated all of the financing it obtained from financial institutions for the construction of its industrial plant to protect part of its sales to be made in the same currency as said financing, the U.S. dollar. Braskem Idesa’s sales projection is reviewed periodically based on historical performance, strategic planning and market projections prepared by specialized external consulting firms, which are reviewed and complemented based on Management’s experience. All hedge transactions conducted by the Company are in compliance with the accounting procedures and practices adopted by Braskem, and effectiveness tests are conducted for each transaction every quarter, which prove the effectiveness of its hedge strategy. The Company determined that hedged items for the Braskem S.A. will be characterized by the first exports in in each quarter until the amount designated for each period is reached, while for the subsidiary Braskem Idesa, these items will be characterized by the first sales in U.S. dollar in the domestic market, disclosed in Notes 20.4(a.i) and 20.4(a.ii), respectively. The liabilities designated for hedge will be aligned with the hedging maturity schedule and the Company’s financial strategy. According to the Financial Policy, the Company may contract derivatives (swaps, non-deliverable forwards (“NDFs”), options, etc.) to manage its exposure to foreign exchange and interest rates. These derivatives may be designated for hedge accounting based on the judgment of Management and when such designation is expected to better demonstrate the compensatory effects on the fluctuations in the items protected by the hedge. The Company currently has derivatives designated for cash flow hedge accounting, as reported in Note 20.3.

4 Risk management

4 Risk management	12 Months Ended
	Dec. 31, 2020
Disclosure of risk management strategy related to hedge accounting [abstract]
Risk management	4 Risk management Braskem is exposed to market risks arising from variations in commodity prices, foreign exchange rates and interest rates, credit risks of its counterparties in cash equivalents, financial investments and trade accounts receivable, and liquidity risks to meet its obligations from financial liabilities. Braskem adopts procedures for managing market and credit risks that are in conformity with its Financial Policy, which is reviewed by the Board of Directors quarterly. The purpose of risk management is to protect the Company’s cash flows and reduce the threats to the financing of its operating working capital and investment programs. 4.1 Market risks Braskem prepares a sensitivity analysis for foreign exchange rate and interest rate risks to which it is exposed, presented in Note 20.6(c.2). Management of the interest rate benchmark reform and associated risks Overview The planning for an organized replacement of interbank offered rates (“IBORs”) for alternative, nearly risk-free interest rates (RFRs, or “Risk-Free Rates”) is being taken under several market initiatives. However, several details regarding the time and transition methods are still being discussed. The Company uses IBORs as reference rates on several of its financial instruments, and as part of these market-wide initiatives, RFRs will eventually replace such reference rates. While the transition will force modifications on contracts that use IBORs as reference rates, the Company expects no significant impact on its risk management and hedge accounting procedures after its completion. However, it will continue to monitor the transition and implement whatever changes or new controls are deemed to be appropriate as potential issues arise. Derivatives The Company holds interest rate swaps for risk management purposes, which are designated in cash flow hedging relationships. The interest rate swaps have floating legs that are indexed to LIBOR. The Company’s derivative instruments are governed by contracts based on the master agreements of the International Swaps and Derivatives Association (“ISDA”). As part of the IBOR reform, the ISDA published a protocol that changed all master agreements in force to include RFRs as replacement rates (fallback) for use upon discontinuation of the various IBORs. The protocol comes into force on January 25, 2021, and Braskem S.A., already has carried out its adoption; other entities of the Company are still in the adoption process. Hedge accounting As of December 31, 2020, Braskem has cash flow hedges indexed to LIBOR. The Company expects that indexation of the hedged items and hedging instruments to LIBOR will be replaced with SONIA (“Sterling Overnight Interbank Average Rate”) in 2021. Whenever the replacement occurs, Braskem expects to apply the amendments related to hedge accounting, however, there is uncertainty about when and how replacement may occur. Hedging relationships may experience hedge ineffectiveness if there is a timing or other mismatch between the transition of the hedged item and that of the hedging instrument to SONIA. Braskem does not expect that the amount accumulated in the other comprehensive income will be immediately reclassified to profit or loss because of IBOR transition. Meanwhile, the Company will ensure that all relevant hedge accounting documentation is evaluated and updated appropriately. The Company will apply the changes described in IFRS 9, issued in September 2019, to the relationships directed affected by the IBOR reform. Theoretically, hedge accounting designations could present ineffectiveness if the amendment in the interest rate benchmark occurs on a date other than the redesignation of these transactions to hedge accounting. However, we expect both changes (of interest rate benchmark and redesignations) to co-occur. Liabilities To date, there are no broad initiatives to replace the benchmarks of IBORs in financial agreements; any modifications will be negotiated bilaterally among the parties. (a) Exposure to commodity risks Most of Braskem’s feedstocks (naphtha, ethane, propane and propylene) and main products (PE, PP and PVC) are commodities quoted on international markets. A series of factors determine the dynamics of these quotes, nevertheless our sales prices are also impacted in a similar proportion when compared with our feedstock supply chain. (b) Exposure to foreign exchange risk Considering the dynamics of the international petrochemical market, where prices are mostly pegged to international dollar-denominated references, Braskem’s sales in Brazil are strongly correlated to the U.S. currency. Therefore, with the goal of partially mitigating the long-term exchange risk, as of September 2016, the Company started to contract financial derivatives to compose a Long-Term Foreign Exchange Hedge Program. The Program mainly aims to mitigate dollar call and put option contracts, hedging expected flows over a 24-month horizon, as detailed in Note 20.3. In addition to the Hedge Program, to balance the composition between dollar-denominated assets and liabilities, Braskem’s Financial Policy requires the Company to maintain a percentage of at least 70% of the dollar-denominated portion of net debt. If convenient, the Company may maintain a percentage of more than 70%, although subject to a sensitivity analysis of key financial indicators and proof of the inexistence of significant risk of deterioration of these indicators. On December 31, 2020, Braskem prepared a sensitivity analysis for its exposure to the fluctuation in the U.S. dollar, as disclosed in Note 20.6. (c) Exposure to interest rate risk Braskem is exposed to the risk that a variation in floating interest rates causes an increase in its financial expense due to payments of future interest. Debt denominated in foreign currency subject to floating rates is mainly subject to fluctuations in Libor. Debt denominated in local currency is mainly subject to the variation in the Interbank Certificate of Deposit (“CDI”) rate. In 2020, Braskem held swap contracts (Note 20.3.1) in which it receives Libor and pays a fixed rate. On December 31, 2020, Braskem prepared a sensitivity analysis for the exposure to the floating interest rates Libor, CDI and Extended National Consumer Price Index (“IPCA”), as disclosed in Notes 20.6(c.1) and (c.2). 4.2 Exposure to credit risk The transactions that subject Braskem to the concentration of credit risks are mainly in bank checking accounts, financial investments, and trade accounts receivable in which Braskem is exposed to the risk of the financial institution or customer involved. In order to manage this risk, Braskem maintains bank current accounts and financial investments with major financial institutions, weighting concentrations in accordance with the credit rating and the daily prices observed in the Credit Default Swap market for the institutions, as well as netting contracts that minimize the total credit risk arising from the many financial transactions entered into by the parties. On December 31, 2020, 45.9% of the amounts recorded as “Cash and cash equivalents” (Note 5) and “Financial Investments” (Note 6) were allocated to financial institutions that had offset agreements with the Company. The obligations under these agreements are accounted for under “Borrowings” (Note 16). The effective netting of these amounts is possible only in the event of default by one of the parties. With respect to the credit risk of customers, Braskem protects itself by performing a rigorous analysis before granting credit and obtaining secured and unsecured guarantees when considered necessary, including credit insurance. The maximum exposure to credit risk of non-derivative financial instruments on the reporting date is the sum of their carrying amounts less any provisions for impairment losses. On December 31, 2020, the balance of trade accounts receivable was net of allowance for doubtful accounts (Note 7). 4.3 Liquidity risk Braskem has a calculation methodology to determine a minimum cash “monthly vision” (30-day horizon) and a minimum cash “yearly vision” (up to 12-month horizon) for the purpose of, respectively: (i) ensuring the liquidity needed to comply with obligations of the following month; and (ii) ensuring that the Company maintains liquidity during potential crises. The amounts to determine the minimum cash “yearly vision” are calculated mainly based on the projected operating cash generation, less short-term debts and working capital needs. The amounts used for determining the minimum cash “monthly vision” consider the projected operating cash disbursement, debt service and contributions to projects, as well as the planned disbursement for derivatives maturing in the period, among other items. The Company uses as minimum cash in its financial policy the greater of these two references. In May 2018, the Company, in keeping with its commitment to maintain its financial liquidity, contracted an international revolving credit facility in the amount of US$1 billion, which expires in 2023. This line may be used without restrictions to improve the Company’s credit quality or in the event of deterioration in the macroeconomic scenario. As of December 31, 2020, this new credit line had not been used. On December 31, 2020, due to the breach of certain covenants provided for in its financing agreement (Note 16), the subsidiary Braskem Idesa recorded under current liabilities its financial obligations with original long-term maturities. Note that Braskem Idesa has been settling all its obligations in accordance with the original maturity schedule and no creditor required or indicated the intention of requiring immediate reimbursement of these obligations or early debt payment. Considering that the group of creditors of Braskem Idesa will continue not requiring prepayment of the debt, Braskem's financial liabilities by maturity, including the amounts due under the Leniency Agreement (Note 25), are shown in the table below. These amounts are calculated based on cash flows not discounted and may not be reconciled with the amounts disclosed in the statement of financial position. Maturity Until Between one and Between two and More than one year two years five years five years Total Trade payables 9,978,595 7,233 - - 9,985,828 Borrowings 1,439,079 4,365,497 7,953,182 71,000,361 84,758,119 Debentures 56,988 125,320 97,057 - 279,365 Braskem Idesa borrowings 1,194,805 2,340,108 2,911,775 10,212,681 16,659,369 Derivatives 1,314,675 223,813 354,483 - 1,892,971 Loan to non-controlling shareholder of Braskem Idesa - - - 4,747,673 4,747,673 Leniency agreement (Note 25) 399,039 313,562 852,766 - 1,565,367 Lease 870,587 641,313 898,124 1,070,768 3,480,792 At December 31, 2020 15,253,768 8,016,846 13,067,387 87,031,483 123,369,484 If Braskem Idesa’s group of creditors require the early payment of this debt, the Company’s financial liabilities by maturity date, including the amounts due under the Leniency Agreement (Note 25), are shown in the table below. These amounts are gross and undiscounted and include contractual interest payments, therefore may not be reconciled with the statement of financial position. Maturity Until Between one and Between two and More than one year two years five years five years Total Trade payables 9,978,595 7,233 - - 9,985,828 Borrowings 1,439,079 4,365,497 7,953,182 71,000,361 84,758,119 Debentures 56,988 125,320 97,057 - 279,365 Braskem Idesa borrowings 8,064,401 - - 7,785,795 15,850,196 Derivatives 1,314,675 223,813 354,483 - 1,892,971 Loan to non-controlling shareholder of Braskem Idesa - - - 4,747,673 4,747,673 Leniency agreement (Note 25) 399,039 313,562 852,766 - 1,565,367 Lease 870,587 641,313 898,124 1,070,768 3,480,792 At December 31, 2020 22,123,364 5,676,738 10,155,612 84,604,597 122,560,311 4.4 Capital management The Company’s policy is to maintain solid capital management to ensure the continuity and development of its business and to maintain the trust of investors, creditors and the general market. The ideal capital structure, according to Braskem’s Management, considers the balance between own capital and the sum of all payables less the amount of cash and cash equivalents and financial investments. This composition meets the Company’s objectives of perpetuity and of offering an adequate return to shareholders and other stakeholders. This structure also permits borrowing costs to remain at adequate levels to maximize shareholder remuneration. Due to the impact of the U.S. dollar on the Company’s operations, the Management of Braskem believes that the own capital used for capital management purposes should be measured in this currency and on a historical basis. Moreover, the Company may temporarily maintain a capital structure that is different from this ideal. This occurs, for example, during periods of growth, when the Company may finance a large portion of its projects through borrowings, provided that this option maximizes return for shareholders once the financed projects start operating. In order to adjust and maintain the capital structure, the Management of Braskem may also consider the sale of non-strategic assets, the issue of new shares or even adjustments to dividend payments. As is the case of liquidity, capital is managed at the consolidated level, except for the liquidity and capital of Braskem Idesa, whose specific management is concentrated at the subsidiary level.

5 Cash and cash equivalents

5 Cash and cash equivalents	12 Months Ended
	Dec. 31, 2020
Cash and cash equivalents [abstract]
Cash and cash equivalents	5 Cash and cash equivalents See accounting policies in Notes 20(a) and 20.5(b). 2020 2019 Cash Domestic market 111,278 13,495 Foreign market (i) 1,835,685 2,289,736 Cash equivalents: Domestic market 8,271,312 1,963,185 Foreign market (i) 3,644,577 2,537,464 Total 13,862,852 6,803,880 (i) On December 31, 2020, it includes cash of R$284,856 and R$619,577 of cash equivalents (R$598,591 of cash and R$418,644 of cash equivalents on December 31, 2019) of the subsidiary Braskem Idesa, which cannot be used by the other subsidiaries of the Company. This item includes cash, bank deposits and highly liquid financial investments available for redemption within three months from the date of purchase. These assets are convertible into a known cash amount and are subject to insignificant risk of change in value. Cash equivalents in Brazil are mainly represented by fixed-income instruments and time deposits held by the funds FIM Jupiter and FIM Netuno. Cash equivalents abroad comprise fixed-income instruments (time deposit).

6 Financial investments

6 Financial investments	12 Months Ended
	Dec. 31, 2020
Financial Investments
Financial investments	6 Financial investments See accounting policies in Notes 3.2.6(a) and 20(a). 2020 2019 Amortized cost Time deposit investments 53,941 38,759 Fair value through profit or loss LFT´s and LF´s (i) 2,163,042 1,588,426 Restricted funds investments (ii) 1,338,289 9,708 Other 87,519 60,319 Total 3,642,791 1,697,212 Current assets 3,627,227 1,687,504 Non-current assets 15,564 9,708 Total 3,642,791 1,697,212 (i) These refer to Brazilian floating-rate government bonds (“LFTs”) issued by the Brazilian federal government and floating-rate bonds (“LFs”) issued by financial institutions. These bonds have original maturity above three months, immediate liquidity in the secondary market and Management expects their realization in the short term. (ii) Includes the following amounts: R$1,322,725 in restricted funds used in the program for relocation of residents in Alagoas (Note 26.1(i)); and R$15,564 of bank deposits with yields of approximately 100% of the Interbank Deposit Rate (“CDI”), and their use is related to the fulfillment of the contractual obligations of the debentures.

7 Trade accounts receivable

7 Trade accounts receivable	12 Months Ended
	Dec. 31, 2020
Trade Accounts Receivable
Trade accounts receivable	7 Trade accounts receivable Refer to Notes 20.5(a) for credit quality of trade accounts receivable. The Company’s average receivables term is generally 30 days; therefore, the amount of the trade accounts receivable corresponds to their fair value. The Company realizes part of its trade accounts receivable through the sale of trade notes to funds and financial institutions that acquire receivables. These operations are not entitled to recourse and the risks and benefits over the receivables are substantially transferred, for which reason the trade notes are derecognized. At December 31, 2020, the total amount of the trade accounts receivables negotiated was R$1.8 billion (R$2 billion on December 31, 2019), with interest expense of R$12 million recorded under Financial Expenses. Note 2020 2019 Customers Domestic market Third parties 2,304,212 1,049,412 Related parties 9 20,863 8,814 2,325,075 1,058,226 Foreign market Third parties 2,603,140 1,477,748 2,603,140 1,477,748 Allowance for doubtful accounts (i) (173,007) (229,323) Total 4,755,208 2,306,651 Current assets 4,731,979 2,285,750 Non-current assets 23,229 20,901 Total 4,755,208 2,306,651 (i) Company’s expected credit losses are determined based on the following stages: Stage 1 – in this stage, expected credit losses are calculated based on the actual experience of credit loss (write-off) over the last five years, segregating customers in accordance with their Operating Risk. Stage 2 – when there is deterioration in the credit risk, the Company considers receivables that were renegotiated and that could be collected in court, regardless of their maturity. Stage 3 – includes financial assets that have objective evidence of impairment; the trigger for evidence of impairment is the delay, without previous negotiation, of more than 180 days. The following table shows the Company’s expected credit loss for each stage: Estimated loss Trade accounts receivable Allowance for Stage 1 Operation risk 1 Minimum risk 2,976,880 Operation risk 2 Minimum risk 1,121,976 Operation risk 3 0.80% 577,145 4,617 Operation risk 4 1.65% 55,033 908 4,731,034 5,525 Stage 2 Operation risk 1 and 2 Minimum risk 20,619 Operation risk 3 and 4 20% 2,812 562 1st Renegotiation lower than or equal to 24 months 25% 1,273 318 Between 90 and 180 days 30% 8,393 2,518 33,097 3,398 Stage 3 Operation risk 5 100% 12,675 12,675 Above 180 days 100% 10,797 10,797 Legal 100% 140,612 140,612 164,084 164,084 Total 4,928,215 173,007 The changes in the allowance for doubtful accounts are presented below: 2020 2019 Balance of provision at the beginning of the year (229,323) (233,625) Provision in the year (65,571) (59,885) Reversal in the year 28,563 45,501 Write-offs 93,324 18,686 Balance of provision at the end of the year (173,007) (229,323) The breakdown of trade accounts receivable by maturity is as follows: 2020 2019 Accounts receivables not past due 4,368,714 2,001,326 Past due securities: Up to 90 days 396,953 318,852 91 to 180 days 6,272 15,368 As of 180 days 156,276 200,428 4,928,215 2,535,974 Allowance for doubtful accounts (173,007) (229,323) Total customers portfolio 4,755,208 2,306,651 Write-off The gross carrying amount of a financial asset is written off when the Company has no reasonable expectations of recovering a financial asset in its entirety or a portion thereof. However, financial assets that are written off could still be subject to enforcement activities to comply with the Company’s procedures for recovery of amounts due.

8 Inventories

8 Inventories	12 Months Ended
	Dec. 31, 2020
Disclosure Of Inventories Abstract
Inventories	8 Inventories 2020 2019 Finished goods 4,258,561 4,634,192 Raw materials, production inputs and packaging 2,008,510 1,665,797 Maintenance materials 749,536 608,693 Advances to suppliers 86,745 68,382 Imports in transit 1,298,334 664,345 Total 8,401,686 7,641,409 Current assets 8,383,650 7,625,084 Non-current assets 18,036 16,325 Total 8,401,686 7,641,409 Inventory cost is based on the average cost of purchases principle. The value of finished products includes raw materials, ancillary and maintenance materials used, depreciation of industrial facilities, expenses with Company’s and third-party personnel involved in industrial production and maintenance, and logistics expenses with the transfer of these products from the plants to the sale terminals. The production overheads are allocated to products based on normal operating capacity. Inventories are measured at the lower of cost and net realizable value and, when necessary, an impairment is recognized. For this estimate, the Company considers the sale price, reduced by all costs of sale, projected for the period during which it expects to sell the product. The effect of the provision for inventories at the year is shown below: Balance at December 31, 2018 20,159 Additions 72,672 Utilization/reversals (10,636) Balance at December 31, 2019 82,195 Additions 120,483 Utilization/reversals (80,106) Balance at December 31, 2020 122,572

9 Related parties

9 Related parties	12 Months Ended
	Dec. 31, 2020
Related party transactions [abstract]
Related parties	9 Related parties Balances at December 31, 2020 Balances at December 31, 2019 Novonor and Novonor and subsidiaries Petrobras and subsidiaries Petrobras and Balance sheet and associates subsidiaries Other Total and associates subsidiaries Other Total Assets Current Trade accounts receivable 6,354 14,509 20,863 4,257 4,557 8,814 Inventories 35,998 35,998 17,242 17,242 Dividends and interest on capital 165 165 3,074 3,074 Total assets 42,352 14,674 57,026 21,499 7,631 29,130 Liabilities Current Trade payables 33,100 601,203 9,641 643,944 12,402 133,759 9,819 155,980 Payable notes 58 58 Other payables 478 119 597 1,420 136 1,556 Non-current Loan to non-controlling shareholders of Braskem Idesa 3,222,493 3,222,493 2,395,887 2,395,887 Total liabilities 33,100 601,681 3,232,253 3,867,034 12,460 135,179 2,405,842 2,553,481 Year ended December 31, 2020 Year ended December 31, 2019 Year ended December 31, 2018 Novonor and Novonor and Novonor and subsidiaries Petrobras and subsidiaries Petrobras and subsidiaries Petrobras and and associates subsidiaries Other Total and associates subsidiaries Other Total and associates subsidiaries Other Total Transactions Sales of products 182,521 326,825 509,346 665,417 588,785 1,254,202 1,225,443 736,192 1,961,635 Purchases of raw materials, finished goods services and utilities (133,127) (14,566,840) (20,350) (14,720,317) (293,501) (12,584,453) (10,738) (12,888,692) (460,480) (15,540,144) (3,800) (16,004,424) Financial income (expenses), net (452) (3,810) (818) (5,080) (96) (5) (10,967) (11,068) (49) (106,516) (106,565) Other income (expenses) (34,873) (34,873) 4,214 4,214 General and administrative expenses Post-employment benefits plan ("EPE") Private pension ("Vexty") (46,738) (46,738) (50,889) (50,889) (48,514) (48,514) (a) New and/or renewed agreements with related companies As provided for in the Company’s bylaws, the Board of Directors has the exclusive power to decide on any contract with related parties that exceed R$20,000 per transaction or R$60,000 collectively per year. This is valid for contracts between Braskem and its subsidiaries and: (i) direct or indirect subsidiaries of Braskem in whose capital an interest is held by the controlling shareholder, by any direct or indirect subsidiaries thereof or by Key Personnel of such entities; (ii) associates of Braskem and subsidiaries of such entities; and (iii) joint ventures in which Braskem participates and any subsidiaries thereof. As part of its control to identify related parties, Key Personnel annually inform whether they, or their close relatives, hold full or shared control of any company. All companies that conducted transactions with Braskem and its subsidiaries are provided in this Note. The related parties that have significant relationship with the Company are as follows: Novonor and its direct and indirect subsidiaries: · Tenenge Montagem e Manutenção Ltda. (“Tenenge”). Petrobras and its indirect joint venture: · Petróleo Brasileiro S.A. (“Petrobras”) · Companhia de Gás da Bahia (“Bahiagás”) · Gás de Alagoas S.A. (“Algás”) · Petrobras Transporte S.A. (“Transpetro”). Joint ventures of Braskem: · Refinaria de Petróleo Riograndense S.A (“RPR”). Associate of Braskem: · Borealis Brasil S.A (“Borealis”). Non-controlling shareholders of Braskem Idesa: · Etileno XXI, S.A. de CV. · Grupo Idesa, S.A. de CV. In the fiscal year ended December 31, 2020, the main transactions with related parties are as follows: (i) Sales of gasoline and gasoil to Refinaria de Petróleo Riograndanse S.A. (“RPR”) are negotiated monthly. Sales in the fiscal year amounted to R$93,632 (R$257,295 in 2019). (ii) In January 2020, Braskem entered into an agreement with Tenenge, a subsidiary of Novonor S.A., to provide industrial maintenance services for shutdowns of large-scale equipment and occasional services on other types of equipment. This agreement has an estimated maximum value of R$669,000 and a term of seven years. The procurement of services rendered in the period amounted to R$45,408. (iii) In February 2020, the Company signed the 5th amendment to the Polypropylene and Polyethylene thermoplastic resins sales agreement with Borealis. The agreement has an estimated maximum amount of R$1,260,000 and is valid through December 17, 2025. In the fiscal year, transactions amounted to R$213,830. (iv) In March 2020, the Company entered into a petroleum sales agreement with Petrobras, which is valid for 30 days after its execution. The agreement has an estimated maximum amount of R$76,161 and was fully received. (v) In April 2020, the Company entered into an agreement for the purchase of up to 220 kton of naphtha with Petrobras, with additional volumes to those contracted for April 2020, to supply Braskem units in the states of Bahia, Rio Grande de Sul and São Paulo with Petrobras. In the fiscal year, transactions amounted to R$89,100. (vi) In June 2020, the Company entered into two naphtha supply agreements with Petrobras from 200 to 450 kton/y, respectively, from the Landulpho Alves Refinery (“RLAM”), with delivery to our industrial unit in Bahia, and from the Alberto Pasqualini Refinery (“REFAP”), to our unit in Rio Grande do Sul. The agreements are in force from December 23, 2020 to December 31, 2025. The maximum estimated amounts of the agreements are R$5 billion and R$2.5 billion, respectively. In the fiscal year, transactions amounted to R$18,200. (vii) In June 2020, the Company entered into a sales option agreement for up to 2,850 kton/y of petrochemical naphtha to Petrobras with mandatory purchase by Braskem. The agreements are in force from January 1, 2021 to December 31, 2025. The maximum estimated amount is R$30 billion. (viii) In June 2020, the Company entered into two contract amendments with Transpetro for vessel loading and unloading services, product storage and leasing of the OSCAN 16 pipeline and tanks located at the Almirante Dutra Terminal (“TEDUT”), that are in force from November 1, 2020 to June 30, 2024. The maximum estimated amounts of the agreements are R$620,500 and R$107,361, respectively. In the fiscal year, transactions amounted to R$53,688 (R$79,123 on December 31, 2019). (ix) In June 2020, the Company entered to a contractual amendment with Petrobras for the transfer of 80,000 m³ of space for storing products owned by Braskem in tanks at the Alberto Pasqualini Refinery (REFAP), that are in force from November 1, 2020 to December 31, 2025. The maximum estimated amount is R$240,000. In the fiscal year, transactions amounted to R$31,730 (R$24,981 on December 31, 2019). (x) In September 2020, the Company executed an amendment to extend the agreement with Petrocoque, for acquisition estimated at 350.4 kton/year of steam by Polyethylene units. This amendment, summed to total amount of the original agreement, executed in September 2009, amounts to R$325.6 million and is valid until March 2021. In the fiscal year, these acquisitions totaled R$34,141 (R$42,835 on December 31, 2019). (xi) In December 2020, the Company entered into an agreement with Petrobras to purchase ethane and propane to produce up to 580,000 tons of ethylene equivalent and sell up to 58.4 million Nm³ of hydrogen. This agreement is effective from January 1, 2021 to December 31, 2025. The estimated amount of the agreement is R$9.2 billion. (xii) In December 2020, the Company entered into a sale agreement with Petrobras for up to 2 million tons of petrochemical naphtha per year, for us in Braskem’s industrial unit in São Paulo. This agreement is effective from December 23, 2020 to December 31, 2025. The estimated amount is R$25 billion. In the fiscal year, the transactions amounted to R$2,800. (xiii) In December 2020, the Company entered into the second amendment to the agreement governing the supply of natural gas by Algás to Braskem, via local gas pipeline. The duration of the agreement was extended via the first amendment executed in September 2019, effective until December 2021, with estimated amount of R$268,338. In the fiscal year, the transactions amounted to R$183,476 (R$236, 913 at December 31, 2019). (xiv) In December 2020, the Company entered into an amendment to the agreement governing the supply of natural gas by Bahiagás to Braskem, via local gas pipeline. In October 2014, Braskem and Bahiagás executed a natural gas supply agreement, effective until December 2017. This agreement is being extended via annual amendments, with the current amendment effective until December 2021, and estimated amount of R$482,400. In the fiscal year, the transactions amounted to R$592,013 (R$901,574 at December 31, 2019). (xv) In December 2020, the Company entered into an agreement with Transpetro involving the provision of logistics services for the water terminals (management and operation) of the port terminals TERG (Rio Grande) and TESC (Santa Clara). This agreement is effective from January 4, 2021 to December 31, 2024. The estimated maximum amount is R$28,878. (xvi) Loan payable to the non-controlling shareholders of Braskem Idesa, with maturity in December 2029 and interest of 7% per annum. These funds were used by Braskem Idesa to finance its construction project. (b) Key management personnel compensation The expenses related to the remuneration of key management personnel, including the Board of Directors, the Fiscal Council, and the Statutory Executive Board, recorded in the profit or loss for the year, are shown as follows: Statement of profit or loss transactions 2020 2019 2018 Remuneration Short-term benefits 74,943 70,366 60,922 Post-employment benefit 961 1,104 989 Long term incentive plan 7,456 14,724 4,404 Total 83,360 86,194 66,315 Compensation of the Company’s key management personnel includes salaries, non-cash benefits and contributions to a post-employment defined benefit plan (see Note 27).

10 Taxes recoverable

10 Taxes recoverable	12 Months Ended
	Dec. 31, 2020
Taxes Recoverable
Taxes recoverable	10 Taxes recoverable 2020 2019 Parent Company and subsidiaries in Brazil IPI 1,435 477 Value-added tax on sales and services (ICMS) - normal operations (a) 293,193 255,945 ICMS - credits from PP&E 163,847 166,824 Social integration program (PIS) and social contribution on revenue 199 45,604 PIS and COFINS - credits from PP&E 353,928 316,973 REINTEGRA program (b) 16,799 19,848 Federal tax credits (c) 1,109,122 2,459,293 Other 40,234 5,434 Foreign subsidiaries Value-added tax ("IVA") 277,175 217,630 Other 9,470 7,701 Total 2,265,402 3,495,729 Current assets 1,192,665 1,238,011 Non-current assets 1,072,737 2,257,718 Total 2,265,402 3,495,729 (a) ICMS – normal operations Accumulated ICMS credits over the past few years arise mainly from interstate acquisitions of electric power subject to tax substitution method and domestic sales subject to deferred taxation. The Management of the Company has been prioritizing a series of actions to maximize the use of these credits and currently does not expect losses on the realization of cumulative balances. (b) REINTEGRA Program The REINTEGRA program aims to refund to exporters the federal taxes levied on the production chain for goods sold abroad. Such credits may be realized in two ways: (i) by offsetting own debits overdue or undue related to taxes levied by the Federal Revenue Service; or (ii) by a cash reimbursement. At the year ended December 31, 2020, the Company recognized credits in the amount of R$7,494 (R$9,157 in 2019) and offset the amount of R$9,959 (R$9,532 in 2019). In the Statement of profit or loss, credits were recognized in the item “Cost of Products Sold.” (c) Federal tax credits The main tax credit refers to the exclusion of ICMS from the PIS/COFINS calculation basis. During 2020, the final and unappealable decisions of proceeding filed by Braskem and other proceedings, originally filed by merged companies, were certified. The oldest period retroactive to 1991. The effects of these decisions were assessed by the Company and, during 2020, a total of R$438,044 (R$2,048,782 in 2019) was recognized related to PIS and COFINS taxes overpaid, with R$310,557 recorded under “Other operating income (expenses)” (R$1,904,206 in 2019) and R$127,488 under “Financial income” (R$207,582 in 2019). The balance on December 31, 2020 is R$1,002,605, recorded under current assets. The balance on December 31, 2019 was R$2,350,817 (current assets of R$783,199 and non-current assets of R$1,567,618). The Company has other lawsuits related to other acquired companies discussing the same tax matter, for which there was no final judgment (Note 24.4(ii)).

11 Investments

11 Investments	12 Months Ended
	Dec. 31, 2020
Disclosure of associates [abstract]
Investments	11 Investments See accounting policies in Notes 2.3. (a) Information on equity method investee Interest in total and Net profit (loss) voting capital (%) for the year Equity Direct and indirect 2020 2019 2018 2020 2019 Jointly-controlled investment RPR (i) 33.20 (63,525) 29,687 6,358 32,217 93,025 Odebrecht Comercializadora de Energia S.A. ("OCE") (ii) (48) Associate Borealis (iii) 20.00 6,019 17,622 (2,900) 161,363 164,086 (i) RPR – its main activities are the refine, processing and sale and import of oil, its byproducts and correlated products. (ii) Entity closed in June 2018. (iii) Borealis – its main activities are the production and commercialization of petrochemical byproducts and correlated products. (b) Changes in equity method investees Domestic associate Borealis RPR Other Total Balance at 2018 32,776 33,094 84 65,954 Dividends and interest on equity (3,002) (4,295) (7,297) Equity in results of investees 3,042 9,857 12,899 Other comprehensive income (7,769) (7,769) Other 56 56 Balance at 2019 32,816 30,887 140 63,843 Dividends and interest on equity (1,748) (164) (1,912) Equity in results of investees 1,204 (21,093) (19,889) Other comprehensive income 1,067 1,067 Other 44 44 Balance at 2020 32,272 10,697 184 43,153 (c) Impact on the consolidation of Braskem Idesa The Company is presenting the financial information of the subsidiary in which the non-controlling shareholder holds interest, and the material effects on the Company’s consolidated information. In light of the allegations of undue payments related to the Ethylene XXI project, which were originally published in the media in Mexico and were included in the testimony by the former CEO of PEMEX to the Office of the Attorney General of Mexico (“Allegations”), Braskem S.A., together with Braskem Idesa, in compliance with the standards established by Braskem's Global Compliance System Policy and Braskem Idesa's governance guidelines, approved the hiring of an U.S. law firm with proven experience in similar cases to conduct an independent internal investigation of the Allegations (“Investigation”). The investigation is ongoing. At the moment, the Company cannot estimate the conclusion date of the investigation, nor the outcome or impacts, if any, on the financial statements, including disclosures. If the investigation identifies evidence to support any of the allegations, such findings could affect the Company's business, financial condition, internal controls over financial reporting, and operating results, as well as the liquidity. Balance sheet Consolidated Braskem without the effect of Braskem Idesa consolidated(i) Eliminations Consolidated 2020 2019 2020 2019 2020 2019 2020 2019 Assets Curent Cash and cash equivalents 12,958,419 5,786,645 904,433 1,017,235 13,862,852 6,803,880 Financial investments 3,627,227 1,687,504 3,627,227 1,687,504 Trade accounts receivable 4,386,825 1,973,414 577,530 331,838 (232,376) (19,502) 4,731,979 2,285,750 Inventories 7,876,485 7,028,641 507,165 596,443 8,383,650 7,625,084 Taxes recoverable 1,144,355 1,084,055 48,310 153,956 1,192,665 1,238,011 Income tax and social contribution 1,547,916 439,933 1,547,916 439,933 Derivatives 33,769 4,712 33,769 4,712 Judicial deposits 2,571,683 2,571,683 Other receivables 688,944 393,593 121,242 339,404 810,186 732,997 32,263,940 20,970,180 2,158,680 2,438,876 (232,376) (19,502) 34,190,244 23,389,554 Non-current Financial investments 15,564 9,708 15,564 9,708 Taxes recoverable 847,399 2,257,652 225,338 66 1,072,737 2,257,718 Income tax and social contribution 72,267 239,847 72,267 239,847 Deferred tax 6,658,276 1,713,837 1,871,696 948,759 8,529,972 2,662,596 Related parties 9,122,666 6,729,486 (ii) (9,122,666) (6,729,486) Derivatives 34,091 17,877 34,091 17,877 Judicial deposits 196,911 1,508,880 196,911 1,508,880 Other receivables 251,398 295,586 17,347 505 268,745 296,091 Investments 43,153 63,843 43,153 63,843 Property, plant and equipment 22,295,803 20,488,870 14,436,012 12,537,615 (iii) (802,666) (711,304) 35,929,149 32,315,181 Intangible 2,568,869 2,568,347 259,822 193,741 2,828,691 2,762,088 Right of use of assets 2,509,484 2,309,506 392,911 296,148 2,902,395 2,605,654 44,615,881 38,203,439 17,203,126 13,976,834 (9,925,332) (7,440,790) 51,893,675 44,739,483 Total assets 76,879,821 59,173,619 19,361,806 16,415,710 (10,157,708) (7,460,292) 86,083,919 68,129,037 Liabilities and shareholders' equity Current Trade payables 9,753,762 8,903,168 424,929 233,323 (232,376) (19,502) 9,946,315 9,116,989 Borrowings 1,318,931 774,924 1,318,931 774,924 Debentures 54,436 46,666 54,436 46,666 Braskem Idesa Borrowings 7,660,128 744,408 7,660,128 744,408 Payroll and related charges 776,134 598,147 38,432 25,576 814,566 623,723 Taxes payable 927,039 306,453 25,650 16,433 952,689 322,886 Income tax and social contribution 284,129 34,856 284,129 34,856 Lease 821,695 619,217 73,414 57,074 895,109 676,291 Provision - geological event in Alagoas 4,349,931 1,450,476 4,349,931 1,450,476 Other financial liabilities 516,933 516,933 Other payables 1,947,569 1,798,865 163,371 109,143 2,110,940 1,908,008 20,233,626 15,049,705 8,385,924 1,185,957 (232,376) (19,502) 28,387,174 16,216,160 Non-current Loan agreements 40,413,192 28,242,052 40,413,192 28,242,052 Braskem Idesa Borrowings 4,399,110 9,237,318 4,399,110 9,237,318 Debentures 181,679 227,901 181,679 227,901 Accounts payable to related parties 9,140,064 6,714,236 (ii) (9,140,064) (6,714,236) Loan to non-controlling shareholders (v) 3,222,493 2,395,887 3,222,493 2,395,887 Income tax and social contribution 576,174 576,174 Deferred income tax and social contribution 1,234,398 273,036 1,234,398 273,036 Provision for losses on subsidiaries 5,283,264 3,082,173 (iv) (5,283,264) (3,082,173) Lease 1,962,235 1,767,314 350,542 233,291 2,312,777 2,000,605 Provision - geological event in Alagoas 4,825,846 1,932,591 4,825,846 1,932,591 Other payables 4,274,837 3,625,695 122,757 33,086 4,397,594 3,658,781 58,751,625 39,150,762 17,234,966 18,613,818 (14,423,328) (9,796,409) 61,563,263 47,968,171 Shareholders' equity Attributable to theCompany's shareholders (2,202,306) 4,886,089 (6,259,084) (3,384,065) 6,259,084 3,383,274 (2,202,306) 4,885,298 Non-controlling interest in subsidiaries 96,876 87,063 (1,761,088) (1,027,655) (1,664,212) (940,592) (2,105,430) 4,973,152 (6,259,084) (3,384,065) 4,497,996 2,355,619 (3,866,518) 3,944,706 Total liabilities and shareholders' equity 76,879,821 59,173,619 19,361,806 16,415,710 (10,157,708) (7,460,292) 86,083,919 68,129,037 (i) Consolidation of Braskem Idesa with its direct subsidiary Braskem Idesa Serviços. (ii) Loan from Braskem Holanda as part of shareholders’ contribution to the Braskem Idesa project. (iii) Adjustment corresponding to the capitalization of a portion of financial charges of the abovementioned loan. (iv) Provision recorded in the subsidiary Braskem Holanda for the negative shareholders' equity of Braskem Idesa. (v) Loan payable, maturing December 2029 and 7% p.a., to the non-controlling shareholders of Braskem Idesa. These proceeds were used by Braskem Idesa to fund its construction project. Statement of profit or loss Consolidated Braskem without the effect of Braskem Idesa consolidated Eliminations Consolidated 2020 2019 2018 2020 2019 2018 2020 2019 2018 2020 2019 2018 Net revenue 55,779,528 49,961,286 54,851,243 4,046,581 3,050,420 3,766,371 (1,282,615) (688,181) (617,748) 58,543,494 52,323,525 57,999,866 Cost of products sold (45,563,723) (44,111,980) (44,928,721) (3,112,129) (2,509,060) (2,314,998) 1,344,438 741,922 667,062 (47,331,414) (45,879,118) (46,576,657) 10,215,805 5,849,306 9,922,522 934,452 541,360 1,451,373 61,823 53,741 49,314 11,212,080 6,444,407 11,423,209 Income (expenses) Selling and distribution (1,609,844) (1,582,794) (1,495,507) (242,211) (200,661) (193,672) (1,852,055) (1,783,455) (1,689,179) (Loss) reversals for impairment of trade accounts receivable (55,074) (4,772) 87,008 (178) (2,297) (55,252) (7,069) 87,008 General and administrative (1,739,541) (2,082,002) (1,669,277) (179,350) (141,269) (123,576) 144 (909) (332) (1,918,747) (2,224,180) (1,793,185) Research and development (250,648) (247,730) (219,256) (250,648) (247,730) (219,256) Results from equity investments (1,026,922) (326,427) 76,821 1,007,524 336,645 (77,709) (19,398) 10,218 (888) Other income 748,923 2,102,684 656,725 1,826 305,750 370,497 750,749 2,408,434 1,027,222 Other expenses (7,573,874) (4,466,450) (502,795) (364,747) 19,508 (51,918) (7,938,621) (4,446,942) (554,713) (1,291,175) (758,185) 6,856,241 149,792 522,391 1,452,704 1,069,491 389,477 (28,727) (71,892) 153,683 8,280,218 Financial results Financial expenses (3,851,233) (3,009,471) (2,227,544) (1,505,628) (1,205,412) (1,090,019) 443,496 332,098 310,012 (4,913,365) (3,882,785) (3,007,551) Financial income 1,032,530 1,135,118 867,185 11,150 47,534 31,879 (443,496) (332,098) (310,012) 600,184 850,554 589,052 Exchange rate variations, net (4,823,269) (1,768,850) (2,014,205) (482,125) 75,610 (232,064) 6,683 (31,280) (10,714) (5,298,711) (1,724,520) (2,256,983) (7,641,972) (3,643,203) (3,374,564) (1,976,603) (1,082,268) (1,290,204) 6,683 (31,280) (10,714) (9,611,892) (4,756,751) (4,675,482) (Loss) profit before income tax and social contribution (8,933,147) (4,401,388) 3,481,677 (1,826,811) (559,877) 162,500 1,076,174 358,197 (39,441) (9,683,784) (4,603,068) 3,604,736 IR and CSL - current and deferred 2,253,684 1,873,207 (639,394) 414,794 89,463 (97,157) 2,668,478 1,962,670 (736,551) 2,253,684 1,873,207 (639,394) 414,794 89,463 (97,157) 2,668,478 1,962,670 (736,551) (Loss) profit for the year (6,679,463) (2,528,181) 2,842,283 (1,412,017) (470,414) 65,343 1,076,174 358,197 (39,441) (7,015,306) (2,640,398) 2,868,185 Statement of cash flows Consolidated Braskem without the effect of Braskem Idesa consolidated Eliminations Consolidated 2020 2019 2018 2020 2019 2018 2020 2019 2018 2020 2019 2018 (Loss) profit before income tax and social contribution (8,933,147) (4,401,388) 3,481,677 (1,826,811) (559,877) 162,500 1,076,174 358,197 (39,441) (9,683,784) (4,603,068) 3,604,736 Adjustments for reconciliation of profit (loss) Depreciation and amortization 2,995,609 2,732,181 2,228,978 1,114,439 952,916 810,581 (61,967) (52,832) (48,982) 4,048,081 3,632,265 2,990,577 Results from equity investments 1,026,922 326,427 (76,821) (1,007,524) (336,645) 77,709 19,398 (10,218) 888 Interest andmonetary and exchange variations, net 8,541,980 3,050,987 4,658,342 1,921,975 1,062,843 1,344,888 (6,683) 31,280 10,714 10,457,272 4,145,110 6,013,944 Reversal of provisions 336,838 320,439 23,725 336,838 320,439 23,725 Provision - geological event in Alagoas 6,901,828 3,383,067 6,901,828 3,383,067 PIS and COFINS credits - exclusion of ICMS from the calculation basis (310,557) (1,904,206) (519,830) (310,557) (1,904,206) (519,830) Loss (reversals) for impairment of trade accounts receivable 55,252 7,069 (87,008) 55,252 7,069 (87,008) Provision for losses and write-offs of long-lived assets 8,794 224,825 69,270 379 3,200 8,794 225,204 72,470 10,623,519 3,739,401 9,778,333 1,209,603 1,456,261 2,321,169 11,833,122 5,195,662 12,099,502 Changes in operating working capital Other financial assets 3,746,107 (3,680,460) 3,746,107 (3,680,460) Financial investments (1,860,827) 797,445 98,349 (1,860,827) 797,445 98,349 Trade accounts receivable (2,247,729) 677,176 251,683 (152,971) 325,820 (7,348) 212,874 (107,950) (20,917) (2,187,826) 895,046 223,418 Inventories (309,492) 825,236 (1,337,618) 56,958 42,581 (199,672) (252,534) 867,817 (1,537,290) Taxes recoverable 1,584,911 1,216,225 1,068,637 (52,357) (20,798) (46,395) 1,532,554 1,195,427 1,022,242 Prepaid expenses (172,027) 85,549 (67,051) 465,812 117,183 (38,112) 293,785 202,732 (105,163) Other receivables 44,513 (242,727) (12,596) 352,590 (30,938) (236,392) 397,103 (273,665) (248,988) Trade payables (2,926,585) 330,633 1,113,381 137,895 (156,138) 209,077 (212,874) 107,950 20,917 (3,001,564) 282,445 1,343,375 Taxes payable 965,191 (485,309) (828,222) (515,430) (84,484) (149,026) 449,761 (569,793) (977,248) Advances from customers 224,764 176,189 (218,623) (25,776) 21,776 18,665 198,988 197,965 (199,958) Leniency agreement (349,842) (341,605) (330,006) (349,842) (341,605) (330,006) Sundry provisions (158,915) (226,519) (116,458) 13,560 10,971 (145,355) (215,548) (116,458) Other payables (1,399,928) 348,916 415,468 33,810 13,287 417,759 (1,366,118) 362,203 833,227 Cash generated from operations 7,763,660 3,220,150 9,815,277 1,523,694 1,695,521 2,289,725 9,287,354 4,915,671 12,105,002 Interest paid (1,946,931) (1,576,526) (1,328,420) (789,890) (661,919) (588,381) (2,736,821) (2,238,445) (1,916,801) Income tax and social contribution paid (252,479) (403,614) (937,557) (5,063) (8,337) (274) (257,542) (411,951) (937,831) Net cash generated by operating activities 5,564,250 1,240,010 7,549,300 728,741 1,025,265 1,701,070 6,292,991 2,265,275 9,250,370 Proceeds from the sale of fixed assets and intangible assets 33,140 12,590 95,133 33,140 12,590 95,133 Proceeds from the sale of investments 81,000 81,000 Funds received in the investments' capital reduction 2,254 2,254 Dividends received 4,822 3,513 41,791 4,822 3,513 41,791 Acquisitions to property, plant and equipment and intangible assets (2,653,009) (2,578,558) (2,635,906) (106,780) (103,964) (70,422) (2,759,789) (2,682,522) (2,706,328) Other investments (2,167) (2,167) Net cash used in investing activities (2,615,047) (2,562,455) (2,417,895) (106,780) (103,964) (70,422) (2,721,827) (2,666,419) (2,488,317) Short-term and long-term debt Acquired 13,049,459 20,586,103 4,301,626 13,049,459 20,586,103 4,301,626 Payments (8,734,505) (17,425,409) (6,592,197) (8,734,505) (17,425,409) (6,592,197) Braskem Idesa borrowings Acquired 3,497,622 3,497,622 Payments (905,210) (4,398,453) (812,929) (905,210) (4,398,453) (812,929) Related parties Acquired loans (payment of loans ) 72,880 (37,618) (72,880) (37,618) Lease (610,392) (407,320) (51,676) (46,870) (662,068) (454,190) Dividends paid (2,380) (668,904) (1,499,900) (2,380) (668,904) (1,499,900) Other financial liabilities (534,456) 499,999 (534,456) 499,999 Cash generated (used) in financing activities 3,167,726 2,584,469 (3,717,591) (994,504) (947,701) (885,809) 2,173,222 1,636,768 (4,603,400) Exchange variation on cash of foreign subsidiaries 1,054,845 (59,659) (309,941) 259,741 80,278 (76,168) 1,314,586 20,619 (386,109) Increase in cash and cash equivalents 7,171,774 1,202,365 1,103,873 (112,802) 53,878 668,871 7,058,972 1,256,243 1,772,544 Represented by Cash and cash equivalents at the beginning for the year 5,786,645 4,584,280 3,480,407 1,017,235 963,357 294,686 6,803,880 5,547,637 3,775,093 Cash and cash equivalents at the end for the year 12,958,419 5,786,645 4,584,280 904,433 1,017,235 963,357 13,862,852 6,803,880 5,547,637 Increase in cash and cash equivalents 7,171,774 1,202,365 1,103,873 (112,802) 53,878 668,671 7,058,972 1,256,243 1,772,544

12 Property, plant and equipmen

12 Property, plant and equipment	12 Months Ended
	Dec. 31, 2020
Property, plant and equipment [abstract]
Property, plant and equipment	12 Property, plant and equipment See accounting policies regarding judgments on the useful life of assets in note 3.1(a) and impairment tests and analysis in note 3.2.2. (a) Reconciliation of carrying amount Land Buildings and Improvements Machinery, Equipment and Facilities Projects and Stoppage in Progress (i) Other Total Cost 602,299 6,676,549 43,024,738 5,102,393 1,784,807 57,190,786 Accumulated depreciation and amortization - (2,026,559) (22,238,530) - (1,165,807) (25,430,896) Balance as of December 31, 2018 602,299 4,649,990 20,786,208 5,102,393 619,000 31,759,890 Acquisitions 0 - 1,280 61,213 2,658,070 3,701 2,724,264 Capitalized financial charges 0 - - - 198,201 - 198,201 Foreign currency translation adjustment 0 11,508 289,118 675,400 105,701 3,536 1,085,263 Cost 11,508 366,939 860,672 105,701 10,109 1,354,929 Depreciation - (77,821) (185,272) - (6,573) (269,666) Transfers by concluded projects - 21,382 884,606 (993,024) 87,036 - Transfers to inventory - - - (47,696) (2,866) (50,562) Transfers to intangible - - - (6,433) - (6,433) Disposals - (634) (223,514) (7,739) (3,659) (235,546) Cost - (1,178) (392,033) (7,739) (31,264) (432,214) Depreciation - 544 168,519 - 27,605 196,668 Depreciation and amortization 0 - (388,869) (2,534,637) - (138,395) (3,061,901) Transfers to right of use of assets - - - - (97,995) (97,995) Cost 0 - - - - (125,497) (125,497) Depreciation 0 - - - - 27,502 27,502 Net book value 0 613,807 4,939,108 21,461,608 5,208,094 622,536 32,845,153 Cost 0 613,807 7,064,972 44,439,196 7,009,473 1,726,026 60,853,474 Accumulated depreciation 0 - (2,492,705) (24,789,920) - (1,255,668) (28,538,293) Balance as of December 31, 2019 0 613,807 4,572,267 19,649,276 7,009,473 470,358 32,315,181 Acquisitions - 590 60,130 2,609,565 4,030 2,674,315 Capitalized financial charges - - - 252,427 - 252,427 Foreign currency translation adjustment 69,244 818,725 1,984,408 1,136,671 27,937 4,036,985 Cost 69,244 1,132,817 2,982,072 1,136,671 74,856 5,395,660 Depreciation - (314,092) (997,664) - (46,919) (1,358,675) Transfers by concluded projects - 105,702 6,248,845 (6,542,755) 188,208 - Transfers to inventory - - - (53,903) 76,709 22,806 Transfers to intangible - - - (22,373) (18,619) (40,992) Cost - - - (22,373) (18,587) (40,960) Depreciation - - - - (32) (32) Disposals (20) (2,358) (22,652) - (1,945) (26,975) Cost (20) (22,657) (328,411) - (12,576) (363,664) Depreciation - 20,299 305,759 - 10,631 336,689 Depreciation - (372,687) (2,787,042) - (144,869) (3,304,598) Net book value 683,031 5,122,239 25,132,965 4,389,105 601,809 35,929,149 Cost 683,031 8,281,424 53,401,832 4,389,105 2,038,666 68,794,058 Accumulated depreciation - (3,159,185) (28,268,867) - (1,436,857) (32,864,909) Balance as of December 31, 2020 683,031 5,122,239 25,132,965 4,389,105 601,809 35,929,149 (i) On December 31, 2020, the amounts recorded under this item corresponded to overhaul costs with scheduled shutdowns in Brazil and at overseas plants that are either in the preparation phase or ongoing in the amount of R$924,747 (R$1,400,667 in 2019), capitalized financial charges in the amount of R$233,963 (R$419,244 in 2019), inventories of spare parts in the amount of R$405,497 (R$430,418 in 2019), strategic projects ongoing in Brazil in the amount of R$256,873 (R$98,879 in 2019) and in Braskem America in the amount of R$313,080 (R$2,611,034 in 2019). The remainder corresponds mainly to various projects for maintaining the production capacity of plants. Items of property, plant and equipment are measured at cost, which includes capitalized borrowing costs, less accumulated depreciation and any accumulated impairment losses. The machinery, equipment and facilities require inspections, replacement of components and maintenance in regular intervals. The Company makes shutdowns in regular intervals that vary from two to six years to perform these activities. These shutdowns can involve the plant as a whole, a part of it, or only relevant pieces of equipment, such as industrial boilers, turbines and tanks. Shutdowns that take place every six years, for example, are usually made to maintain industrial plants as a whole. Expenses with each scheduled shutdown are included in property, plant and equipment items that were the stoppage’s subject matter and are fully depreciated until the beginning of the following related stoppage. The expenditures with personnel, the consumption of small materials, maintenance and the related services from third parties are recorded, when incurred, as production costs. Property, plant and equipment items are depreciated on a straight-line basis (see note 3.1(b) for judgments on the useful life of assets). Projects in progress are not depreciated. Depreciation begins when the assets are available for use. Borrowing costs are capitalized into ongoing projects, using: (i) the average rate of the financings; and (ii) the exchange variation portion that corresponds to any positive difference between the average rate of financing in the domestic market and the rate cited in item (i). In 2020, the capitalized charges amounted to R$252,427 (R$198,201 in 2019). The average rate of these charges in the year was 7.85% p.a. (6.47% p.a. in 2019). At December 31, 2020, the acquisition of property, plant and equipment with payment installments is R$160,877 (R$103,315 in 2019). (b) Property, plant and equipment by country 2020 2019 s Brazil 15,105,253 15,682,081 Mexico 13,632,787 11,826,309 United States of America 6,823,655 4,545,974 Germany 363,975 258,291 Other 3,479 2,526 35,929,149 32,315,181 (c) Impairment loss The Company performed the impairment analyses, as described in Note 3.2.2(a). Management of Braskem believes that the plants will operate at or near their planning capacity, within the projected period. The prices of products manufactured by the Company are quoted in international markets, in the short or medium term, and follow the prices of raw materials to preserve the business’s historical margins. As a result, the carrying amount do not exceed its recoverable amount on December 31, 2020 and 2019.

13 Intangible assets

13 Intangible assets	12 Months Ended
	Dec. 31, 2020
Intangible assets and goodwill [abstract]
Intangible assets	13 Intangible assets Goodwill Brands Software Customers Total Cost 3,187,678 437,384 799,960 392,180 4,817,202 Accumulated amortization (1,128,804) (191,087) (565,828) (190,501) (2,076,220) Balance as of December 31, 2018 2,058,874 246,297 234,132 201,679 2,740,982 Acquisitions 112 61,414 61,526 Foreign currency translation adjustment 12,957 2,704 15,661 Cost 13,919 6,356 20,275 Amortization (962) (3,652) (4,614) Transfers from projects and stoppage in progress 6,433 6,433 Amortization (7,751) (32,747) (22,016) (62,514) Net book value 2,058,874 251,615 271,936 179,663 2,762,088 Cost 3,187,678 451,415 874,159 392,180 4,905,432 Accumulated amortization (1,128,804) (199,800) (602,223) (212,517) (2,143,344) Balance as of December 31, 2019 2,058,874 251,615 271,936 179,663 2,762,088 Acquisitions 1,789 38,660 66 40,515 Foreign currency translation adjustment 38,409 21,531 59,940 Cost 46,311 56,422 102,733 Amortization (7,902) (34,891) (42,793) Transfers from property, plant and equipment 40,992 40,992 Amortization (6,753) (46,075) (22,016) (74,844) Net book value 2,058,874 285,060 327,044 157,713 2,828,691 Cost 3,187,678 499,515 1,010,201 392,246 5,089,640 Accumulated amortization (1,128,804) (214,455) (683,157) (234,533) (2,260,949) Balance as of December 31, 2020 2,058,874 285,060 327,044 157,713 2,828,691 Average annual rates of amortization 2.96% 14.50% 6.01% The Company adopts the following accounting practice for each class of intangible assets: (a) Goodwill See accounting policies regarding impairment test and analysis in note 3.2.2(b). The existing goodwill was determined in accordance with the criteria established by the accounting practices adopted in Brazil before the adoption of the IASB pronouncements and represents the excess of the amount paid over the amount of equity of the companies acquired. Such goodwill was amortized until December 2008. From 2009 on, it has been subject to annual impairment tests. In December 2020, Braskem performed an impairment test using the value in use method (discounted cash flow), as shown below: Allocated Recoverable Book goodwill amount value (i) CF/Book value Northeastern petrochemical complex 475,780 14,846,391 3,540,498 4.2 Southern petrochemical complex 1,390,741 32,417,808 4,583,414 7.1 Vinyls unit 192,353 2,168,594 2,073,351 1.0 (i) The book value includes, in addition to goodwill, tangible and intangible assets with defined useful lives and the working capital. The assumptions adopted to determine the discounted cash flow are described in Note 3.2.3(b). The WACC used was 9.99% p.a. The inflation rate considered for perpetuity was 2.76%. Given the potential impact on cash flows of the “discount rate” and “perpetuity”, Braskem conducted a sensitivity analysis based on changes in these variables, with cash flows shown in the table below: +0.5% on -0.5% on discount rate perpetuity Northeastern petrochemical complex 13,745,276 14,209,808 Southern petrochemical complex 30,218,367 31,168,593 Vinyls unit 1,930,200 2,029,886 The main assumptions used for projecting cash flows are related to the projection of macroeconomic indicators, international prices, and global and local demand in the countries where Braskem has operational production plants. Macroeconomic indicators are provided by a widely recognized consulting firm and include items such as: exchange, inflation, and interest rates, among others. Prices for key petrochemical products are obtained from projections produced by specialized third party consulting firm, which are reviewed and supplemented based on Management´s experience. Also, final prices take into consideration meetings of specific internal committees and the knowledge of the Company’s experts in preparing the benchmarks for each market. In most cases, for the projected period, the internally projected prices have gone through a new revision compared to those originally projected by international consulting firm. Similar to prices, global demand is also contracted from a specific consulting firm. In the markets where the Company operates more directly, they consider additional variables for the local demand composition. (b) Intangible assets with definite useful lives See accounting policies regarding judgments on the useful life of assets in note 3.1(a) and impairment tests and analysis in note 3.2.2. (b.1) Brands and patents The technologies acquired from third parties, including those acquired through business combination, are recorded at the cost of acquisition and/or fair value and other directly attributed costs, net of accumulated amortization and provision for impairment, when applicable. Technologies that have definite useful lives and are amortized using the straight-line method based on the term of the purchase agreement (between 10 and 20 years). Expenditures with research are accounted for in profit or loss as they are incurred, and development expenses are capitalized when projects are viable. (b.2) Customers and suppliers’ agreements Customers and suppliers’ agreements arising from a business combination were recognized at fair value at the respective acquisition dates. These customers and suppliers’ agreements have a definite useful life and are amortized using the straight-line method over the term of the respective purchase or sale agreement (between 14 and 28 years). (b.3) Software licenses All software booked has definite useful life estimated between 5 and 10 years and is amortized using the straight-line method. Costs associated with maintaining computer software programs are recognized in profit or loss as incurred. (c) Intangible assets by country 2020 2019 Brazil 2,517,470 2,521,941 Mexico 259,822 193,741 United States of America 25,156 24,313 Germany 26,211 22,077 Other 32 16 2,828,691 2,762,088

14 Right-of-use assets and Leas

14 Right-of-use assets and Lease Liability	12 Months Ended
	Dec. 31, 2020
Right-of-use Assets And Lease Liability
Right-of-use assets and Lease Liability	14 Right-of-use assets and lease liability Beginning January 1, 2019, the Company assesses whether a contract is or contains a lease based on the definition of a lease, according to IFRS 16 Leases. The Company leases various offices, railcars, vessels, pieces of equipment and vehicles. Such leases are negotiated individually and are subject to various terms and conditions. As a lessee, the Company to determine the enforceable term of the lease, the management considers all facts and circumstances that create an economic incentive for exercising the option of extension or create economic disincentives for not exercising the option of early termination. (a) Right-of-use assets Leases are recognized as a right-of-use asset and a corresponding liability on the date on which the leased asset becomes available to the Company. For each right-of-use asset measured, an equivalent liability was recorded. The right-of-use asset is measured at the cost composed of: • The amount initially measured of the lease liabilities; • Any payment made up to the start of the lease, deducting any incentive received; • Any initial direct cost; and • Renovation costs. The right-of-use asset is subsequently depreciated using the straight-line method from the commencement date to the end of the lease term, unless the lease transfers ownership of the underlying asset to the Company by the end of the lease term or the cost of the right-of-use asset reflects that the Company will exercise a purchase option. In that case the right-of-use asset will be depreciated over the useful life of the underlying asset, which is determined on the same basis as those of property and equipment. Changes in right-of-use assets: Balance as of Foreign currency Balance as of 12/31/2019 Acquisitions Depreciation Disposal translation adjustment 12/31/2020 Buildings and constructions 212,170 65,176 (54,712) 37,262 259,896 Computer equipment and goods 12,523 9,341 (5,499) 334 16,699 Machinery and equipment 743,248 227,690 (198,441) (25,801) 3,032 749,728 Ships 865,387 258,193 (286,905) (12,687) 10,860 834,848 Rail cars 746,040 244,199 (180,146) 197,243 1,007,336 Vehicles 26,286 21,502 (14,473) 573 33,888 Total 2,605,654 826,101 (740,176) (38,488) 249,304 2,902,395 Transfers from Balance as of property, plant Initial addition Foreign currency Balance as of 12/31/2018 and equipment on 01/01/2019 Acquisitions Depreciation Disposal translation adjustment 12/31/2019 Buildings and constructions 207,524 153,771 (27,759) (122,488) 1,122 212,170 Computer equipment and goods 2,726 4,932 6,179 (1,446) 132 12,523 Machinery and equipment 7,956 526,318 344,928 (136,615) 661 743,248 Ships 906,495 150,670 (191,778) 865,387 Rail cars 87,313 633,492 103,169 (132,728) 54,794 746,040 Vehicles 35,479 1,073 (10,493) 227 26,286 Total 97,995 2,314,240 759,790 (500,819) (122,488) 56,936 2,605,654 The expense related to the low-value leases recognized in the 12-month period ended December 31, 2020 was R$981 (R$1,070 on December 31, 2019). To optimize lease costs during the lease term, the Company must provide guaranteed residual amounts for the leased asset. For certain lease agreements for freight cars, which were classified until December 31, 2018 as financial leases, the Company guaranteed any difference between the flow of contractual payments and the fair value of these assets upon the end of the enforceable term, limited to R$62,256 (US$12,559) as of December 31, 2020 and R$50,662 (US$12,559) as of December 31, 2019. (b) Lease liability The lease liability is initially measured at the present value of the lease payments that are not paid at the commencement date, discounted using the interest rate implicit in the lease, or if that rate cannot be readily determined, the Company’s incremental borrowing rate. The lease liability considers the net present value of the following lease payments: • Fixed payments discounting any incentive received; • Variable payments based on rates or indexes; • Expected payables to the lessor referring to the guaranteed residual amount; • Exercise price of a purchase option, if it is reasonably certain that lessee will exercise such option; and • Payment of fines for termination of the lease if the contractual terms provide for lessee’s exercise option. The Company’s incremental borrowing rate corresponds to the one the Company would have pay to borrow over a similar term, and with a similar security, the funds necessary to obtain an asset of a similar value to the right-of-use asset in a similar economic environment. The weighted average incremental rate applied upon December 31, 2020 was 7.30% p.a. (5.58% p.a in 2019). The lease liability is measured at amortised cost using the effective interest method. Reconciliation of lease liability carrying amount: 2019 Balance at December 31, 2018 100,557 Initial adoption IFRS 16 2,191,908 Balance at January 01, 2019 2,292,465 Acquired 911,619 Disposals (122,488) Interests and monetary and exchange variations, net 121,061 Currancy translation adjustments 56,805 Payments (454,190) Interest paid (128,376) Balance at December 31, 2019 2,676,896 2020 Balance at December 31, 2019 2,676,896 Acquired 826,101 Disposals (38,488) Interests and monetary and exchange variations, net 327,135 Currancy translation adjustments 267,493 Payments (662,068) Interest paid (189,183) Balance at December 31, 2020 3,207,886 Current liability 895,109 Non-current liability 2,312,777 Total 3,207,886 The minimum annual commitments are shown below: 2020 2021 870,587 2022 641,313 2023 494,331 2024 403,793 2025+ 1,070,768 Total 3,480,792 The above table presents the amounts of obligations related to leasing agreements, which are not discounted and shown by maturity. The lease liability disclosed in the statement of financial position is measured at the fair value of these obligations. (c) Extension Options Some leases contain extension options exercisable by the Company. The extension options held are exercisable only by the Company and not by the lessors. The Company assesses at lease commencement date whether it is reasonably certain to exercise the options if there is a significant event or significant changes in circumstances within its control. (d) Non-cash transactions The net effect of additions and disposals of leasing that does not affect the cash flow in 2020 are R$787,613 (R$580,055 in 2019). (e) Lease arrangements not yet effective The Company is part of lease arrangements not effective at the year-end. The present value of the commitments corresponds to R$828 million.

15 Trade account payables

15 Trade account payables	12 Months Ended
	Dec. 31, 2020
Trade and other payables [abstract]
Trade account payables	15 Trade account payables See accounting policies in note 20. Information about the Company’s exposure to currency and liquidity is included in Note 4. Note 2020 2019 Trade payables: Domestic market - Third parties 1,077,679 1,006,391 Third parties (drawee risk) (i) 239,512 74,685 Related parties 9 97,900 155,980 Related parties (drawee risk) (i) 546,044 - - Foreign market (ii) - - Third parties 8,023,032 7,964,536 - - Present value adjustment - foreign market (iii) (30,619) (80,766) 9,953,548 9,120,826 Current liabilities 9,946,315 9,116,989 Non-current liabilities 7,233 3,837 Total 9,953,548 9,120,826 (i) The Company participates in a finance programme under which its suppliers may elect to receive early payment of their invoices from a bank by factoring their receivable from the Company. Under the arrangement there is no change in the instruments issued by the supplier and amount and payment terms are maintained. (ii) Considers R$4.7 billion (R$6.5 billion in 2019) in raw material purchases due in up to 360 days for which the Company provides letters of credit issued by financial institutions that indicate the suppliers as beneficiaries. (iii) The rate for calculating the Present Value Adjustment (PVA) applied to the external market payments with terms equal to or longer than 90 days is calculated based on the average rate for lengthening the term of trade payables.

16 Borrowings

16 Borrowings	12 Months Ended
	Dec. 31, 2020
Borrowings [abstract]
Borrowings	16 Borrowings See accounting policies in note 20. Information about the Company’s exposure to currency and liquidity is included in Note 4. (a) Borrowings Annual financial charges 2020 2019 Foreign currency Bonds Note 16 (b) 34,963,651 24,583,325 Export prepayment Note 16 (c) 2,207,762 863,293 Investments Note 16 (d) 996,531 751,376 Other Note 16 (e) 2,755,200 1,952,667 Transactions costs (688,814) (499,194) 40,234,330 27,651,467 Current liabilities 1,206,084 676,831 Non-current liabilities 39,028,246 26,974,636 Total 40,234,330 27,651,467 Local currency Export credit notes 100.00 of CDI + 0.70 402,739 405,642 Commercial notes 100.00 of CDI + 0.85 545,171 554,307 BNDES 4.00 1,538 19,998 BNDES IPCA + 6.04 490,963 270,520 FINEP/FINISA 3.59 26,154 78,776 FINAME TLP + 6.00 324 BNB-FNE (Fundo Constitucional de Financiamentos do Nordeste) IPCA + interest between 2.39 and 2.78 5,639 5,582 Fundo de Desenvolvimento do Nordeste (FDNE) 6.50 27,196 32,152 Other 19.14 237 Transactions costs (1,607) (2,029) 1,497,793 1,365,509 Current liabilities 112,847 98,093 Non-current liabilities 1,384,946 1,267,416 Total 1,497,793 1,365,509 Foreign currency and local currency Current liabilities 1,318,931 774,924 Non-current liabilities 40,413,192 28,242,052 Total 41,732,123 29,016,976 (b) Bonds Issue date Issue amount Outstanding amount Maturity Interest 2020 2019 Oct-2010 450,000 250,000 no maturity date 7.38 1,299,175 1,025,428 Jul-2011 500,000 500,000 Jul-2041 7.13 2,679,603 2,078,372 Feb-2012 250,000 250,000 no maturity date 7.38 1,299,175 1,025,428 May-2012 500,000 286,267 May-2022 5.38 1,500,304 1,175,799 Jul-2012 250,000 250,000 Jul-2041 7.13 1,339,801 1,039,186 Feb-2014 500,000 500,000 Feb-2024 6.45 2,667,250 2,068,790 May-2014 250,000 250,000 Feb-2024 6.45 1,333,625 1,034,395 Oct-2017 500,000 195,760 Jan-2023 3.50 1,034,179 847,715 Oct-2017 1,250,000 1,250,000 Jan-2028 4.50 6,633,913 5,145,440 Nov-2019 1,500,000 1,500,000 Jan-2030 4.50 7,941,207 6,090,640 Nov-2019 750,000 750,000 Jan-2050 5.88 3,992,933 3,052,132 Jul-2020 (i) 600,000 600,000 Jan-2081 8.50 3,242,486 - - Total 7,300,000 6,582,027 34,963,651 24,583,325 (i) This Bond is recorded as a financial liability. According to the specific methodology adopted by some rating agencies, only for the purposes of calculating leverage, the referred bond is classified as a hybrid capital instrument. The Company and its subsidiaries may, from time to time, acquire in the secondary market bonds issued by the Company and/or its subsidiaries (c) Export pre-payment Initial amount Outstanding of the transaction amount Issue date (US$ thousand) US$ Maturity Charges (% per year) 2020 2019 Sep-2017 135,000 97,500 Mar-2027 US dollar exchange variation + semiannual Libor + 1.61 509,141 457,712 Oct-2019 100,000 100,000 Oct-2024 US dollar exchange variation + quarterly Libor + 1.75 521,469 405,581 Aug-2020 225,000 225,000 Feb-2031 US dollar exchange variation + semiannual Libor + 1.70 1,177,152 Total 460,000 422,500 2,207,762 863,293 (d) Capital raised for construction of new plant in United States The subsidiary Braskem America contracted a credit facility in the amount of up to US$225 million (R$1,1693.3 million) that is secured by Euler Hermes, a German export credit agency, which was used to finance a portion of the investment in the new PP plant located in La Porte, Texas. The funds will be released in accordance with the progress of the project’s construction and the remaining funding is expected to occur in the first half of 2021. Initial amount Outstanding of the transaction amount Issue date (US$) US$ Maturity Charges (% per year) 2020 2019 July-2018 (i) 203,742 191,757 Dec-2028 Us dollar exchange variation + semianual Libor + 0.65 996,531 751,376 Total 203,742 191,757 996,531 751,376 (i) US$130,650 released in July 2018, US$13,677 in September 2018, US$13,823 in December 2018, US$7,688 in March 2019, US$6,231 in June 2019, US$4,549 in September 2019, US$2,780 in December 2019, US$4,158 in March 2020, US$5,738 in June 2020, US$5,068 in September 2020, US$2,380 in December 2020 and capitalized interest in the amount of US$7,000. (e) Others Identification Issue date Initial amount Outstanding Maturity Charges (% per year) 2020 2019 SACE (i) Nov-2018 295,125 236,100 Nov-2028 Us dollar exchange variation + semianual Libor + 0.90 1,228,285 1,073,526 SACE (i) Dec-2019 150,000 135,000 Dec-2029 Us dollar exchange variation + semianual Libor + 0.90 702,027 605,448 MONFORTE (ii) Apr-2019 72,345 57,811 Apr-2026 Us dollar exchange variation + semianual Libor + 1.00 300,434 273,693 ING (iii) Jan-2020 100,000 100,000 Jan-2025 Us dollar exchange variation + semianual Libor + 1.65 524,454 Total 617,470 528,911 2,755,200 1,952,667 (i) Credit facility contracted by the subsidiary Braskem Netherlands B.V. with guarantee from SACE, an Italian export credit agency. (ii) Credit facility contracted by Braskem S.A. with a term of 7 years. To consummate this facility, certain assets of the Company’s plants were pledged to the financial institution in amount higher than financing. (iii) Credit facility contracted by the subsidiary Braskem Netherlands B.V. with a term of 5 years. (f) Payment schedule The maturity profile of the long-term amounts is as follows: 2020 2019 2021 380,324 2022 2,086,460 1,549,976 2023 1,824,477 1,416,730 2024 5,653,432 4,418,409 2025 1,121,748 369,725 2026 580,062 350,320 2027 514,819 297,382 2028 6,986,264 5,314,976 2029 217,418 71,326 2030 7,951,181 6,068,078 2031 and thereafter 13,477,331 8,004,806 Total 40,413,192 28,242,052 (g) Guarantees Braskem has given collaterals for part of its borrowings as follows: Total Total Loans Maturity debt 2020 guaranteed Guarantees BNDES Jan-2021 1,538 1,538 Mortgage of plants, land and property, pledge of machinery and equipment FINEP Jul-2024 22,736 22,736 Bank surety FINISA Dec-2023 3,418 3,418 Bank surety BNB-FNE Jun-2027 5,639 5,639 Bank surety and pledge of reserve liquidity fund. Total 33,331 33,331 Braskem S.A. has fully and unconditionally guaranteed the debt securities issued by Braskem Finance, Braskem America Finance and Braskem Netherlands Finance B.V., 100-percent-owned subsidiaries of Braskem. There are no significant restrictions on the ability of Braskem to obtain funds from these subsidiaries.

17 Braskem Idesa Financing

17 Braskem Idesa Financing	12 Months Ended
	Dec. 31, 2020
Braskem Idesa Financing
Braskem Idesa Financing	17 Braskem Idesa Financing Outstanding Principal amount US$ amount Identification US$ Maturity Charges (% per year) 2020 2019 Project finance Project finance I 700,000 467,519 feb-2027 Us dollar exchange variation + quarterly Libor + 3.25 0 2,444,515 2,149,002 Project finance II 210,000 131,591 feb-2027 Us dollar exchange variation + 6.17 0 690,311 608,260 Project finance III 600,000 409,870 feb-2029 Us dollar exchange variation + 4.33 0 2,145,326 1,849,896 Project finance IV 660,000 462,463 feb-2029 Us dollar exchange variation + quarterly Libor + 3.88 0 2,419,920 2,078,545 Total under current liabilities 2,170,000 1,471,443 7,700,072 6,685,703 Bond 900,000 900,000 nov-2029 Us dollar exchange variation + 7.45 4,729,587 3,640,381 Transactions costs (370,421) (344,358) Total 12,059,238 9,981,726 Current liabilities 7,660,128 744,408 Non-current liabilities 4,399,110 9,237,318 Total 12,059,238 9,981,726 (i) Partial prepayment of US$10,630. (ii) Partial prepayment of US$9,111. (iii) Partial prepayment of US$13,212. In line with the Company’s Financial Policy, the investment in the Braskem Idesa petrochemical complex was financed under a Project Finance model, under which the construction loan is paid exclusively using the cash generated by the Company itself and the shareholders provide limited guarantees. This financing includes the guarantees typical to Project Finance transactions, such as assets, receivables, cash generation and other rights of Braskem Idesa. The financing also contains various other covenants typical to contracts of this kind, such as: debt service reserve account and contingent equity commitment. At December 31, 2020, such guarantees corresponded to US$194 million (R$1 billion) and US$208 million (R$1.1 billion), respectively. On the reporting date of the financial statements of December 31, 2020, certain non-monetary covenants established in the contracts remained unfulfilled. As a result, the entire balance of non-current liabilities, in the amount of R$6,538,646, was reclassified to current liabilities, in accordance with IAS 1 (Presentation of Financial Statements). In accordance with the aforementioned accounting standards, reclassification is required in situations in which the breach of certain contractual obligations entitles creditors to request from Braskem Idesa the prepayment of obligations in the short term. In this context, note that none of the creditors requested said prepayment of obligations and that Braskem Idesa has been settling its debt service obligations in accordance with their original maturity schedule. Furthermore, Braskem Idesa has been negotiating the waiver of such breaches with its creditors in order to reclassify the entire amount reclassified from current liabilities back to non-current liabilities. The following amortization schedule presents the maturities considering the breach of contractual obligations and the original contractual terms: With breach of contratual obligations Original contractual maturities 2020 2019 2020 2019 2020 744,408 744,408 2021 7,660,128 800,752 1,121,482 800,752 2022 699,090 907,343 699,090 2023 892,568 1,157,584 892,568 2024 978,479 1,268,619 978,479 2025 883,333 1,145,377 883,333 2026 743,566 964,410 743,566 2027 329,718 428,750 329,718 2028 257,117 334,753 257,117 2029 4,399,110 3,652,695 4,730,920 3,652,695 Total 12,059,238 9,981,726 12,059,238 9,981,726

18 Debentures

18 Debentures	12 Months Ended
	Dec. 31, 2020
Disclosure Of Debentures Abstract
Debentures	18 Debentures Issue date Issuer Series Maturity Annual financial charges (%) 2020 2019 Mar-2013 DAC Single Mar-2025 IPCA + 6% 177,009 202,992 Sep-2013 Cetrel Single Sep-2025 126.5% of CDI 59,106 71,575 236,115 274,567 Current liabilities 54,436 46,666 Non-current liabilities 181,679 227,901 Total 236,115 274,567 (a) Payment schedule The maturity profile of the long-term debentures is as follows: 2020 2019 2021 52,078 2022 53,406 52,100 2023 53,417 52,125 2024 53,443 52,153 2025 21,413 19,445 Total 181,679 227,901 (b) Guarantees The issuers entered into agreements for the fiduciary sale of credit rights, in which attached accounts are maintained to cover debt service for the three months of the installments coming due, under the terms of the instruments of assignment.

19 Reconciliation of financing

19 Reconciliation of financing activities in statement of cash flow	12 Months Ended
	Dec. 31, 2020
Reconciliation Of Financing Activities In Statement Of Cash Flow
Reconciliation of financing activities in statement of cash flow	19 Reconciliation of borrowing activities in the statement of cash flow Current and non-current Borrowings, debentures and Braskem Idesa financing Borrowings Debentures Total borrowings Braskem Idesa Loan to Lease Dividends Other Balance at December 31, 2019 29,016,976 274,567 29,291,543 9,981,726 2,395,887 2,676,896 6,502 516,933 Acquired 13,049,459 13,049,459 Payments (8,699,033) (35,472) (8,734,505) (905,210) (37,618) (662,068) (2,380) (534,456) Cash used in financing activities 4,350,426 (35,472) 4,314,954 (905,210) (37,618) (662,068) (2,380) (534,456) Other changes Interest paid (1,754,199) (24,945) (1,779,144) (754,829) (13,665) (189,183) Interest and monetary and exchange variations, net 4,664,034 21,965 4,685,999 1,044,110 188,074 327,135 17,523 VAT on loan 68,149 Acquired 826,101 Disposal (38,488) Currency translation adjustments 5,454,886 5,454,886 2,693,441 621,666 267,493 Additional dividends of subsidiary 2,450 Prescribed dividends (1,110) Other (6) 8,364,721 (2,980) 8,361,741 2,982,722 864,224 1,193,058 1,334 17,523 Balance at December 31, 2020 41,732,123 236,115 41,968,238 12,059,238 3,222,493 3,207,886 5,456

20 Financial instruments

20 Financial instruments	12 Months Ended
	Dec. 31, 2020
Disclosure of detailed information about financial instruments [abstract]
Financial instruments	20 Financial instruments (a) Classification and subsequent measurement Financial Assets On initial recognition, a financial asset is classified as measured at: amortized cost; fair value through other comprehensive income (FVOCI) – debt investment or debt instrument; or fair value through profit or loss (FVTPL), depending on the characteristics of the contractual cash flows of the Company’s financial asset and the business model for the management of these financial assets. A financial asset is measured at amortized cost if it meets both of the following conditions and is not designated as at FVTPL: i. It is held within a business model whose objective is to hold assets to collect contractual cash flows; and ii. Its contractual terms give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. A financial asset can also be measured at FVOCI if it meets both of the following conditions and is not designated as at FVTPL: i. It is held within a business model whose objective is achieved by both collecting contractual cash flows and selling financial assets; and ii. Its contractual terms give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. All financial assets not classified as measured at amortized cost or FVOCI as described above are measured at FVTPL. This includes all derivative financial assets. Financial assets – Subsequent measurement and gains and losses Financial assets at FVTPL These assets are subsequently measured at fair value. Net gains and losses, including any interest or dividend income, are recognized in profit or loss. However, see Note 20.3 for derivatives designated as hedging instruments. Financial assets at amortized cost These assets are subsequently measured at amortized cost using the effective interest method and. The amortised cost is reduced by impairment losses. Interest income, foreign exchange gains and losses and impairment are recognized in profit or loss. Any gain or loss on derecognition is recognised in profit or loss. Financial assets at FVOCI These assets are subsequently measured at fair value. Interest income calculated using the effective interest method, foreign exchange gains and losses and, when applicable, impairment loss are recognized in profit or loss. Other net gains and losses are recognized in “Other Comprehensive Income”. On derecognition, gains and losses accumulated in OCI are reclassified to profit or loss. Equity instruments at FVOCI These assets are subsequently measured at fair value. Dividends are recognized as income in profit or loss, unless the dividend represents clearly a recovery of a portion of the investment cost. Other net gains and losses are recognized in OCI and never reclassified to profit or loss. Financial liabilities - classification, subsequent measurement and gains and losses Financial liabilities are classified as measured at amortised cost or FVTPL. A financial liability is classified as at FVTPL if it is classified as held-for-trading, it is a derivative or it is designated as such on initial recognition. Financial liabilities at FVTPL are measured at fair value and net gains and losses, including any interest expense, are recognised in profit or loss. Other financial liabilities are subsequently measured at amortised cost using the effective interest method. Interest expense and foreign exchange gains and losses are recognised in profit or loss. Any gain or loss on derecognition is also recognised in profit or loss. (b) Derecognition Financial Asset The Company derecognizes a financial asset when the contractual rights to the cash flows from the financial asset expire or when the Company transfers the rights to receive the contractual cash flows in a transaction in which either: i. substantially all of the risks and rewards of ownership of the financial asset are transferred; or ii. the Company neither transfers nor retains substantially all of the risks and rewards of ownership and it does not retain control of the financial asset. When the Company enters into transactions whereby it transfers assets recognized in its statement of financial position, but retains either all or substantially all of the risks and rewards of the transferred assets, the financial assets are not derecognized. Financial Liabilities The Company derecognizes a financial liability when its contractual obligations are discharged or cancelled, or expire. The Company also derecognizes a financial liability when its terms are modified and the cash flows of the modified liability are substantially different, in which case a new financial liability based on the modified terms is recognized at fair value. On derecognition of a financial liability, the difference between the carrying amount extinguished and the consideration paid (including any non-cash assets transferred or liabilities assumed) is recognized in profit or loss. (c) Offsetting Financial assets or financial liabilities are offset and the net amount presented in the statement of financial position when, and only when, the Company currently has a legally enforceable right to set off the amounts and it intends either to settle them on a net basis or to realize the asset and settle the liability simultaneously. (d) Derivative financial instruments and hedge accounting The Company holds derivative financial instruments to hedge its foreign currency and interest rate risk exposures. Embedded derivatives are separated from the host contract and accounted for separately if the host contract is not a financial asset and certain criteria are met. Derivatives are initially measured at fair value. Subsequent to initial recognition, derivatives are measured at fair value, and changes therein are generally recognized in profit or loss. The Company designates certain derivatives as hedging instruments to hedge the variability in cash flows associated with highly probable forecast transactions arising from changes in foreign exchange rates and interest rates and certain derivatives and non-derivative financial liabilities as hedges of foreign exchange risk on a net investment in a foreign operation. At inception of designated hedging relationships, the Company documents the risk management objective and strategy for undertaking the hedge. The Company also documents the economic relationship between the hedged item and the hedging instrument, including whether the changes in cash flows of the hedged item and hedging instrument are expected to offset each other. Refer to Note 2.4 and 4.1 for the effects due to interest rate benchmark reform. Cash flow hedges When a derivative is designated as a cash flow hedging instrument, the effective portion of changes in the fair value of the derivative is recognized in other comprehensive income (OCI). The effective portion of changes in the fair value of the derivative that is recognized in OCI is limited to the cumulative change in fair value of the hedged item, determined on a present value basis, from inception of the hedge. Any ineffective portion of changes in the fair value of the derivative is recognized immediately in profit or loss. If the hedge no longer meets the criteria for hedge accounting, or the hedging instrument is sold, expires, is terminated or is exercised, then hedge accounting is discontinued prospectively. When hedge accounting for cash flow hedges is discontinued, the amount that has been accumulated in OCI remains in equity until, for a hedge of a transaction resulting in the recognition of a non-financial item, it is included in the non-financial item’s cost on its initial recognition or, for other cash flow hedges, it is classified to profit or loss in the same period or periods as the hedged expected future cash flows affect the profit or loss. If the hedged future cash flows are no longer expected to occur, then the amounts that have been accumulated in OCI are immediately reclassified to profit or loss. 20.1 Fair Value (a) Fair value measurement Fair value is the price to be received in the sale of an asset or paid for the transfer of a liability in a transaction not forced between market players on the measurement date, in the main market or, in the case of a lack of one, the most advantageous market in which the Company has access on said date. The following methods and assumptions were used to estimate the fair value: (i) Financial assets classified as fair value through profit and loss or as fair value through other comprehensive income are measured in accordance with the fair value hierarchy (Level 1 and Level 2), with inputs used in the measurement processes obtained from sources that reflect the most recent observable market prices. (ii) Trade accounts receivable and trade payables, mostly classified as amortized cost, corresponds to their respective carrying amounts due to the short-term maturity of these instruments. When purchase or sale prices include material financial charges, the securities are adjusted to their present value. (iii) The fair value of borrowings is estimated by discounting future contractual cash flows at the market interest rate, which is available to Braskem in similar financial instruments. (iv) The fair value of bonds is based on prices negotiated in financial markets, plus the respective carrying amount of interests. The fair values of the remaining assets and liabilities correspond to their carrying amount. The assessment model for liabilities (Note 20.2) considers the present value of expected payments, discounted by a discount rate adjusted to the risk. (b) Fair value hierarchy The fair value of the Company's financial instruments mainly determined and categorized into a fair value hierarchy as follows: Level 1 – fair value obtained through prices quoted (without adjustments) in active markets for identical assets or liabilities, such as the stock exchange; and Level 2 – fair value obtained from financial models using directly observable market data, such as discounted cash flow, when the instrument is a forward purchase/sale or a swap contract, or such as the Black-Scholes model, when the instrument has the characteristics of an option. To measure the credit risk of the parties involved in derivative instruments, Braskem uses CVA (Credit Valuation Adjustment) or DVA (Debt Valuation Adjustment) models, applied flow by flow on the mark-to-market value of each instrument. The Company adopts the ratings of the other parties for positive flows and its own rating for negative flows, both available in the market and disclosed by renowned rating agencies, as a necessary assumption to define the probability of default. 20.2 Non-derivative financial instruments and other liabilities Fair value Book value Fair value Note Classification by category hierarchy 2020 2019 2020 2019 Cash and cash equivalents 5 Cash and banks Amortized cost 1,946,963 2,303,231 1,946,963 2,303,231 Financial investments in Brazil Fair value through profit or loss Level 2 8,271,312 1,963,185 8,271,312 1,963,185 Financial investments abroad Fair value through profit or loss Level 2 3,644,577 2,537,464 3,644,577 2,537,464 13,862,852 6,803,880 13,862,852 6,803,880 Financial investments 6 LFT´s and LF´s Fair value through profit or loss Level 2 2,163,042 1,588,426 2,163,042 1,588,426 Time deposit investments Amortized cost 53,941 38,759 53,941 38,759 Other Fair value through profit or loss Level 2 1,425,808 70,027 1,425,808 70,027 3,642,791 1,697,212 3,642,791 1,697,212 Trade accounts receivable 7 Amortized cost 4,677,092 2,246,248 4,677,092 2,246,248 Trade accounts receivable 7 Fair value through other comprehensive income Level 2 78,116 60,403 78,116 60,403 Trade payables 15 Amortized cost 9,953,548 9,120,826 9,953,548 9,120,826 Borrowings 16 Amortized cost Foreign currency - Bond Level 1 34,963,651 24,583,325 37,155,060 25,790,532 Foreign currency - other borrowings Level 2 5,959,493 3,567,336 6,371,070 3,218,410 Local currency Level 2 1,499,400 1,367,538 2,591,920 1,075,803 42,422,544 29,518,199 46,118,050 30,084,745 Braskem Idesa borrowings 17 Amortized cost Project Finance Level 2 7,700,072 6,685,703 11,486,114 6,116,434 Bond Level 1 4,729,587 3,640,381 4,411,259 3,892,878 12,429,659 10,326,084 15,897,373 10,009,312 Debentures 18 Amortized cost Level 2 236,115 274,567 248,778 293,282 Loan ton non-controlling Amortized cost 3,222,493 2,395,887 3,222,493 2,395,887 Leniency agreement 25 Amortized cost 1,474,350 1,742,268 1,474,350 1,742,268 Other financial liabilities (i) Amortized cost 516,933 516,933 (i) Amount received due to the assignment of an agreement to supply ethylene to the client, without recourse, settled in 2020. 20.3 Derivative financial instruments 20.3.1 Changes Operation characteristics Accumulated Net Net OCI (equity) (Asset)/ (Asset)/ Fair value Principal Extrinsic Intrinsic Fair Liability Change in Financial Liability Identification Note hierarchy exposure Derivatives value value value 2019 fair value settlement 2020 Non-hedge accounting transactions Exchange swap Level 2 Argentine peso Dollar 296 540 (839) (3) NCE swap Level 2 Real Dollar 25,604 129,297 (9,757) 145,144 Swap ACC Level 2 Dollar Real 16,259 (16,259) Swap C3/PGP Level 2 Propane Propene 66,223 (2,322) 63,901 Swap Nafta/Gasolina Level 2 Gasoline Naphtha 7,046 7,046 25,900 219,365 (29,177) 216,088 Hedge accounting transactions Dollar call and put options (a.i) Level 2 Real Dollar (43,948) (100,853) (144,801) (2,298) 594,780 (447,681) 144,801 Dollar swap (a.ii) Level 2 Real Dollar+Fixed rates 38,620 12,091 (50,711) Interest rate swaps (a.iii) Level 2 Libor Fixed rates (266,889) 26,707 162,615 (33,547) 155,775 Dollar swap CDI (a.ii) Level 2 Real Dollar+Fixed rates (566,641) 107,246 459,394 566,640 (43,948) (100,853) (978,331) 170,275 1,228,880 (531,939) 867,216 Derivatives Current assets (4,712) (33,769) Non-current assets (17,877) (34,091) Current liabilities 49,251 592,251 Non-current liabilities 169,513 558,913 196,175 1,083,304 The counterparties in these contracts are constantly monitored based on the analysis of their respective ratings and Credit Default Swaps (“CDS”). Braskem has many bilateral risk mitigators in its derivative contracts, such as the possibility of depositing or requesting deposits of a guaranteed margin from the counterparties it deems convenient. Hedge financial instruments held at December 31, 2020 were contracted on both internationally recognized stock exchanges and on Over the Counter (“OTC”) markets with large financial counterparties under global derivative contracts in Brazil or abroad. Braskem’s Financial Policy provides for the active management and continued protection against undesired fluctuations in currencies and rates arising from its operations and financial items, with the possibility of contracting derivative instruments (swaps, NDFs, options, etc.). The other market risks are addressed on a case-by-case basis for each transaction. In general, Braskem assesses the need for hedging in the analysis of prospective transactions and seeks to customize the hedge and keeps it in place for the hedged period transaction. Braskem may elect derivatives for the application of hedge accounting in accordance with IFRS 9. The hedge designation is not mandatory. In general, Braskem will elect to designate financial instruments as hedges when the application is expected to provide a significant improvement in presenting the offsetting effect on the changes in the hedged items. (a) Hedge accounting transactions (a.i) Dollar call and put option On December 31, 2020, Braskem held a total notional amount of put options of R$2.0 billion, with an average strike price of 4.33 R$/US$. Simultaneously, the Company also held a total notional amount of call options of R$1.5 billion, with an average strike price of R$/US$5.94. The operations have a maximum term of 24 months. Dollar-denominated future sales in Brazilian Real were designated for hedge accounting, with the months of revenue recognition always coinciding with the months of the options. The future elements of forward exchange contracts are excluded from the designation of hedge instrument and are separately recorded as hedging cost, which is recognized under shareholders' equity in the other comprehensive income. Operation characteristics Accumulated OCI (equity) Principal Extrinsic Intrinsic Fair Identification exposure Derivatives value value value Dollar call and put option Real Dollar (43,948) (100,853) (144,801) (a.ii) Dollar Swap In 2018, the Company contracted foreign exchange derivative operations (“swaps”) in the aggregate amount of R$1.3 billion, with annual maturities over the following 5 years starting January 2019. The amount payable in January 2020 was subject to the variation in the IPCA index. The remaining maturities are subject to the variation in the CDI. These operations were designated to cash flow hedge accounting, where the hedging instruments are foreign exchange derivatives and the hedged objects are highly probable future revenues in the domestic market subject to fluctuations in Brazilian Real/U.S. dollar price. Accordingly, the mark-to-market adjustment of the effective portion of the hedge will be recognized under shareholders equity in the line “Other comprehensive income” and will be recognized in the financial result only upon the maturity of each installment. The future elements of forward exchange contracts are excluded from designation of hedge instrument and are separately recorded as hedging cost, which is recognized under shareholders' equity in the hedge cost reserve. (a.iii) Hedge operation by the subsidiary Braskem Idesa related to Project Finance Interest rate swap linked to Libor Identification Nominal value Hedge Maturity Fair value, net US$ (interest rate per year) 2020 2019 Swap Libor I to VI 616,519 1.9825% Aug-2025 155,775 26,707 Total 616,519 155,775 26,707 Derivatives Current liabilities 53,838 5,768 Non-Current liabilities 101,937 20,939 Total 155,775 26,707 Braskem Idesa contracted swap operations with the purpose of offsetting part of the Libor variation arising from the financings mentioned in Note 15. This hedge operation shares the same guarantees with the Project Finance. 20.4 Non-derivative financial liabilities designated to hedge accounting (a.i) Future exports in U.S. dollars On May 1, 2013, Braskem S.A. designated non-derivative financial instrument liabilities, denominated in U.S. dollars, as a hedge for the flow of its highly probable future exports. Thus, the impact of exchange rates on future cash flows in dollars derived from these exports is offset by the foreign exchange variation on the designated liabilities, partly eliminating the volatility of results. The exchange rate on the date of the designation was US$ 1: R$2.0017. Additionally, on October 10, 2017, Braskem S.A. designated new financial instruments for the future sales hedging, which mature in 2028. The hedged exchange rate was US$1: R$3.1688. In 2019, three new designations were made, as follows: with maturity in 2025, at an initial rate of US$1: R$3.6694; with maturity in 2025, at an initial rate of US$1: R$3.9650; and with maturity between 2030 and 2031, at an initial rate of US$1: R$3.9786. The main actions carried out in 2020 are detailed below: • January 2, 2020: Designation of US$600 million of future sales with maturity in 2032 (hedged exchange rate of US$1: R$4.0213); • March 31, 2020: Discontinuation of hedge accounting of U$$362 million of flows in 2020 (discontinuation rate of US$1: R$5.1987). On December 31, 2020, the exports that were designated not yet realized and not discontinued are shown below: Total nominal value US$ 2021 336,000 2023 200,000 2024 688,854 2025 400,000 2028 1,250,000 2030 800,000 2031 800,000 2032 800,000 5,274,854 The following table shows the changes in financial instruments designated for this hedge in the year: US$ Hedge Realizated discontinued 2019 discontinued hedge Designations 2020 Designated balance 5,398,854 (1,086,000) 362,000 600,000 5,274,854 The Company considers these exports in the selected period (2021/2032) as highly probable, based on the following factors: • In recent years, Braskem S.A. exported an average US$2.8 billion per year, which represents around 3 to 4 times the annual exports of the hedged exports. • Hedged exports represent between 20% and 30% of the export flows planned by the Company. The exports of the Company are not sporadic or occasional but constitute an integral part of its strategy and of the petrochemical business, in which competition is global. On December 31, 2020, the maturities of financial liabilities designated, within the scope of the consolidated statement of financial position, were as follows: Total nominal value US$ 2021 336,000 2023 200,000 2024 688,854 2025 400,000 2028 1,250,000 2030 800,000 2031 800,000 2032 800,000 5,274,854 The following table provides the balance of discontinued hedge accounting in the year ended December 31, 2020 (US$1,617,372), which is recorded in shareholders’ equity under “Other comprehensive income” and will be transferred to financial income (expenses) in accordance with the schedule of future hedged sales: Conversion rate Total nominal at Inception Closing rate Gross nominal value US$ R$/US$ R$/US$ value Hedge descontinued - From third to fourth quarter 2021 380,000 2.0017 3.9786 751,222 Hedge descontinued - From first to fourth quarter 2022 719,000 2.0017 3.9786 1,421,391 Hedge descontinued - From first to third quarter 2023 518,372 2.0017 3.9786 1,024,770 1,617,372 3,197,383 To ensure the continuity of the hedging relationship, the Company refinances and/or replaces these hedge instruments to adjust them to the hedged exports’ schedule and value depending on the availability of financial liabilities designated as hedging item. The following table provides the balances of exchange variation recognized in the Company’s net financial income (expenses) due to the realization of exports designated, for this hedge in the 12-month period ended December 31, 2020: Conversion rate Total nominal at Inception Closing rate Gross nominal value US$ R$/US$ R$/US$ value First quarter 181,000 2.0017 4.2119 400,047 Second quarter 181,000 2.0017 5.1987 578,657 Third quarter 181,000 2.0017 5.1987 578,657 Fourth quarter 181,000 2.0017 5.5194 636,698 724,000 2,194,059 The changes in foreign exchange variation and Income Tax and Social Contribution under “Other comprehensive income” of this hedge are as follows: Exchange Net variation IR and CSL effect At December 31, 2019 (8,408,164) 2,858,775 (5,549,389) Exchange variation recorded in the period on OCI / IR and CSL (6,881,183) 2,339,602 (4,541,581) Exchange variation transferred to profit or loss / IR and CSL 2,194,059 (745,980) 1,448,079 At December 31, 2020 (13,095,288) 4,452,397 (8,642,891) The realizations expected for 2021 will occur in conformity with the initial designation schedule, and the exchange variation recorded in “Other comprehensive income” will be recycled to the financial results. For the two first quarters of the year, realizations will be made at the weighted average exchange rate of exports in the corresponding period; for the remaining quarters, they are made at the discounted cash flow rates. The quarterly schedule of hedged exports in the following quarters of 2021 follows: Total nominal value US$ First quarter 150,000 Second quarter 186,000 Third quarter 180,000 Fourth quarter 200,000 716,000 (a.ii) Liabilities related to the Project Finance of future sales in U.S. dollar On October 1, 2014, the subsidiary Braskem Idesa designated its liabilities in the amount of R$2,878,936 related to Project Finance, denominated in U.S. dollar, as hedge instruments to protect highly probable future sales flows. Due to the disbursements by the project's lenders in 2015, Braskem Idesa designated new amounts in April and September 2015, of US$290,545 and US$23,608, respectively, for hedge accounting. Therefore, the impact of exchange variation on future flows of sales in U.S. dollar derived from these sales in dollar will be offset by the exchange variation on the designated liabilities, partially eliminating the volatility in the results of the subsidiary. The Management of Braskem Idesa believes these future sales are highly probable, based on the following: • In Mexico, domestic sales can be made in U.S. dollar. In 2016, the Company began to operate and sell products, including sales in U.S. dollar in the domestic and international markets. • The hedged flow corresponds to less than 35% of the planned revenue flow of the project over the quarterly designation period. The current amount of sales already meets the volume of designated hedge, which confirms the highly probable nature of the designated cash flow. • The financing was obtained through a Project Finance structure and will be repaid exclusively through the cash generation of the project (Note 17). Therefore, the existence of the debit is directly associated with the highly probable nature of the future sales in U.S. dollar. As of December 31, 2020, designated and unrealized sales were as follows: Nominal value US$ 2021 208,946 2022 183,318 2023 230,992 2024 251,884 2025 227,775 2026 192,651 2027 89,516 2028 71,341 2029 15,020 2030 225,000 2031 225,000 2032 225,000 2033 225,000 2,371,443 The following table shows the changes in financial instruments designated for this hedge in the year: US$ Discontinued Rebalanced New 2019 hedge hedge designations 2020 Designated balance 2,552,407 (267,577) 86,613 2,371,443 In 2020, the designated financial liabilities to hedge future sales were distributed as follows: Nominal value US$ 2021 208,946 2022 183,318 2023 230,992 2024 251,884 2025 227,775 2026 192,651 2027 89,516 2028 71,341 2029 15,020 2030 225,000 2031 225,000 2032 225,000 2033 225,000 2,371,443 The following table provides the total amount of hedge accounting discontinued up to December 31, 2020 (US$752,870), which was transferred from “Other comprehensive income” to “profit and loss” of Braskem Idesa: Conversion rate Total nominal at Inception Closing rate Total nominal Gross nominal value US$ MXN/US$ MXN/US$ value MXN value Hedge discontinued in May 16, 2016 10,493 13.4541 17.9915 47,611 10,160 Hedge discontinued in December 2, 2019 712,823 13.6664 19.6113 4,237,661 904,317 Hedge discontinued in December 10, 2019 28,740 13.4541 19.3247 168,721 36,005 Hedge discontinued in February 18,2020 814 13.4541 18.5712 4,165 889 752,870 4,458,158 951,371 The following table provides the balances of exchange variation recognized in Braskem Idesa’s financial income (expenses) due to the realization of sales designated and discontinued for this hedge in the 12-month period ended December 31, 2020: Conversion rate Total nominal at Inception Closing rate Total nominal Gross nominal value US$ MXN/US$ MXN/US$ value MXN value First quarter 61,369 13.6555 18.9637 325,759 75,162 Second quarter 65,612 13.6539 22.4746 578,744 139,205 Third quarter 69,855 13.6542 21.4351 543,535 133,798 Fourth quarter 69,855 13.6534 20.3032 464,522 123,563 266,691 1,912,560 471,728 The changes in foreign exchange variation and Income Tax and Social Contribution under “Other comprehensive income” are as follows: Exchange Net variation IR effect At December 31, 2019 (2,560,436) 768,865 (1,791,571) Exchange variation recorded in the period on OCI / IR (445,427) 133,632 (311,795) Exchange variation transferred to profit or loss / IR 471,728 (141,518) 330,210 At December 31, 2020 (2,534,135) 760,979 (1,773,156) Effectiveness tests were conducted and all operations were deemed effective in reducing the dispersion of revenue from sales designated for hedge, when evaluated in Pesos. The realizations expected for 2021 will occur in accordance with the initial designation schedule, and the exchange variation recorded in “Other comprehensive income” will be written off to the financial results. Below is the quarterly schedule of hedged sales in U.S. dollars in 2021: Nominal value US$ First quarter 69,855 Second quarter 75,848 Third quarter 77,094 Fourth quarter 80,594 303,391 20.5 Credit quality of financial assets (a) Trade accounts receivable Virtually none of Company’s clients have risk ratings assigned by credit rating agencies. For this reason, the Company developed its own credit rating system for all accounts receivable from clients in Brazil and abroad. On December 31, 2020 and 2019, considering the stages 1, 2 and 3 of expected credit losses, the percentage of trade accounts receivable by risk ratings was as follows: (%) 2020 2019 1 Minimal Risk 67.52 74.23 2 Low Risk 20.08 14.89 3 Medium Risk 10.43 7.82 4 High Risk 1.10 1.06 5 Very High Risk (i) 0.86 1.99 (i) Most clients in this group are inactive and the respective accounts are in the process of collection actions in the courts. Clients in this group that are still active buy from Braskem and pay in advance. Default indicators: Last 12 months Domestic Export market market December 31, 2020 0.05% 0.14% December 31, 2019 0.05% 0.17% December 31, 2018 0.08% 0.45% This calculation considers the accounts receivable figure overdue more than 30 days, divided by consolidated gross revenue in the last 12 months. For the export market, around 80% of the portfolio has guarantees, consisting primarily of credit insurance. For the domestic market, around 27% of the portfolio has guarantees, mainly surety from the partners of counterparties, complemented by credit insurance. (b) Other financial assets In order to determine the credit ratings of counterparties of financial assets classified under cash and cash equivalents, and financial investments, the Company uses the risk rating of agencies Standard& Poor’s, Moody’s and Fitch Ratings, within the limits established in its financial policy approved by the Board of Directors. 2020 2019 Financial assets with risk assessment AAA 13,639,273 5,475,075 AA+ 412,612 109,933 AA 735,755 AA- 199,405 1,458,424 A+ 1,336,334 159,848 A 53,941 121,132 A- 91,487 1,171,746 BBB+ 982,225 BBB 49 17,451,081 8,496,158 Financial assets without risk assessment Other financial assets with no risk assessment (i) 54,562 4,934 54,562 4,934 Total 17,505,643 8,501,092 (i) Investments approved by the Management of the Company, in accordance with the financial policy. 20.6 Sensitivity analysis Financial instruments, including derivatives, may be subject to changes in their fair value as a result of the variation in commodity prices, foreign exchange rates, interest rates, shares and share indexes, price indexes and other variables. The sensitivity of the derivative and non-derivative financial instruments to these variables are presented below: (a) Selection of risks On December 31, 2020, the main risks that can affect the value of Company’s financial instruments are: • U.S. dollar/Brazilian Real exchange rate; • Mexican peso/Brazilian Real exchange rate; • Libor floating interest rate; • IPCA inflation rate; • Selic interest rate; and • CDI interest rate. For the purposes of the risk sensitivity analysis, the Company presents the exposures to currencies as if they were independent, that is, without reflecting in the exposure to a foreign exchange rate the risks of the variation in other foreign exchange rates that could be directly influenced by it. (b) Value at risk The value at risk of the derivatives held by the Company which is defined as the loss that could result in one month as from December 31, 2020, with a probability of 5%, and under normal market conditions, was estimated by the Company at US$91,437 for put options and call options (Note 20.3.1 (a.i)), US$1.280 for the swap of Libor related to Braskem Idesa project (Note 20.3.1 (a.iii)), US$29,511 for Dollar swap (Note 20.3.1(a.ii)) and US$8,623 for NCE swap. (c) Selection of scenarios The Focus Market Readout published by the Central Bank of Brazil (“BACEN”) was used to create the probable scenario for the U.S. dollar/Brazilian Real exchange rate, the Selic interest rate and the CDI interest rate as at December 31, 2020. The Selic rate is used as benchmark for sensitivity analysis of the CDI rate. According to the Market Readout, at the end of 2021, the U.S. dollar will remain at approximately R$5.14, while the Selic rate should remain at 2.00% p.a. The Selic rate is used as benchmark for sensitivity analysis of the CDI rate. Since the Market Readout survey does not include consensus forecasts for the Libor rate, the average projection of the U.S. Federal Reserve for the Federal Funds rate at the end of the year was used, published in December

21 Taxes payable

21 Taxes payable	12 Months Ended
	Dec. 31, 2020
Taxes Payable
Taxes payable	21 Taxes payable 2020 2019 Brazil IPI 125,338 58,945 ICMS 403,422 184,728 PIS and COFINS 284,944 150,664 Other 43,560 37,857 Other countries Value-added tax 16,027 11,933 Other 80,768 8,112 Total 954,059 452,239 Current liabilities 952,689 322,886 Non-current liabilities 1,370 129,353 Total 954,059 452,239

22 Income tax (''IR'') and soci

22 Income tax (''IR'') and social contribution (''CSL'')	12 Months Ended
	Dec. 31, 2020
Income Tax Ir And Social Contribution
Income tax (''IR'') and social contribution (''CSL'')	22 Income tax (“IR”) and social contribution (“CSL”) Income tax expense comprises current and deferred tax. It is recognised in profit, or items recognised directly in equity or in OCI. (a) Current income tax and social contribution Current tax comprises the expected tax payable or receivable on the taxable income or loss for the year and any adjustment to the tax payable or receivable in respect of previous years. The amount of current tax payable or receivable is the best estimate of the tax amount expected to be paid or received that reflects uncertainty related to income taxes, if any. It is measured using tax rates enacted or substantively enacted at the reporting date. Current tax assets and liabilities are offset only if certain criteria are met. Income tax and social contribution, presented in current assets, amount to R$1,547,916 on December 31, 2020. Out of this total, R$982 million relates to the tax refund from a U.S. Government program. On March 27, 2020, the U.S. government approved a program to assist U.S. companies that were enacted in response to the economic impacts caused by Covid-19, called the Coronavirus Aid, Relief, and Economic Security Act (“CARES” Act). The act enables Braskem America to opt for a tax benefit involving the deduction of 100% of the depreciation of the costs of assets put into operation in 2020 (“bonus depreciation”), which enabled taxpayers to offset the tax losses generated as from January 1, 2021, or in the five prior fiscal years. With the benefit from the bonus depreciation, Braskem America determined a tax refund of R$982 million, recorded as income tax recoverable. (b) Amounts recognized in profit and loss 2020 2019 2018 (Loss) before IR and CSL (9,683,784) (4,603,068) 3,604,736 IR and CSL at the rate of 34% 3,292,487 1,565,043 (1,225,610) Permanent adjustments to the IR and CSL calculation basis IR and CSL on equity in results of investees 6,595 3,469 (302) Thin capitalization (695,741) (221,337) Effect of the refund of Braskem America's tax benefit (i) (737,841) Difference of rate applicable to each country (ii) 252,323 293,647 468,129 Fine in leniency agreement - (25,390) Effect from the retrospective tax rate on bonus depreciation of Braskem America 334,460 Other permanent adjustments 216,195 347,238 21,232 Effect of IR and CSL on results of operations 2,668,478 1,962,670 (736,551) Breakdown of IR and CSL: Current IR and CSL expense Current year (52,830) (251,641) (512,951) Changes in estimates related to prior years - 22,696 3,177 (52,830) (228,945) (509,774) Deferred IR and CSL expense Origination and reversal of temporary differences 2,677,328 2,062,501 (369,546) Tax losses (IR) and negative base (CSL) - 129,114 142,769 Recognition of previously unrecognised deductible temporary differences 43,980 2,721,308 2,191,615 (226,777) Total 2,668,478 1,962,670 (736,551) Effective rate 27.6% 42.6% 20.4% (i) Considering Universal Basis Taxation (“TBU”), the tax refund provided by U.S. Government affects the tax calculation of Braskem S.A. arising from the offsetting of Income Tax and Social Contribution Tax (IRPJ/CSLL) in the years of use of the bonus depreciation benefit. The amount calculated was R$738 million, which was recorded under current and non-current liabilities, in the item income tax and social contribution tax. (ii) Includes the impact from the difference between IR/CSL tax rate in Brazil (34%) used for the preparation of this note and the tax rates in countries where the subsidiaries abroad are located, as follows: Official rate - % Headquarters (Country) 2020 2019 2018 Braskem Alemanha Germany 31.18 31.18 31.18 Braskem America e Braskem America Finance USA 21.00 21.00 21.00 Braskem Argentina Argentina 30.00 30.00 30.00 Braskem Chile Chile 27.00 27.00 27.00 Braskem Holanda, Braskem Holanda Finance and Braskem Holanda Inc Netherlands 25.00 25.00 25.00 Braskem Idesa, Braskem Idesa Serviços, Braskem México - Braskem México Serviços and Braskem México Proyectos Mexico 30.00 30.00 30.00 Braskem India India 30.00 (c) Deferred income tax and social contribution Refer to Note 3.2.1 for the uncertainties on assumptions and estimates regarding deferred tax assets. Deferred tax is recognised in respect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. Deferred tax assets are recognised for unused tax losses, unused tax credits and deductible temporary differences to the extent that it is probable that future taxable profits will be available against which they can be used. Future taxable profits are determined based on the reversal of relevant taxable temporary differences. If the amount of taxable temporary differences is insufficient to recognise a deferred tax asset in full, then future taxable profits, adjusted for reversals of existing temporary differences, are considered, based on the business plans for individual subsidiaries in the Company. Deferred tax assets are reviewed at each reporting date and are reduced to the extent that it is no longer probable that the related tax benefit will be realised; such reductions are reversed when the probability of future taxable profits improves. Unrecognised deferred tax assets are reassessed at each reporting date and recognised to the extent that it has become probable that future taxable profits will be available against which they can be used. Deferred tax is measured at the tax rates that are expected to be applied to temporary differences when they reverse, using tax rates enacted or substantively enacted at the reporting date, and reflects uncertainty related to income taxes, if any. The measurement of deferred tax reflects the tax consequences that would follow from the manner in which the Company expects, at the reporting date, to recover or settle the carrying amount of its assets and liabilities. Deferred tax assets and liabilities are offset only if certain criteria are met. (b.i) Changes in balances of deferred tax assets and liabilities Assets As of December 31, 2018 Impact on the P&L Impact on the equity Other As of December 31, 2019 Impact on the P&L Other As of December 31, 2020 Tax losses (IR) and negative base (CSL) 2,021,578 129,114 2,150,692 1,127,492 3,278,184 Goodwill amortized 39,282 (17,605) 21,677 (15,157) 6,520 Exchange variations 39,959 1,092,392 1,132,351 2,685,264 3,817,615 Temporary adjustments (i) 802,170 1,555,097 2,357,267 2,639,070 4,996,337 Business combination 159,572 (74,033) 85,539 (29,328) 56,211 Tax credits 176,290 110,080 (236,537) 49,833 27,199 77,032 Other 62,288 62,288 (16,922) 45,366 3,238,851 2,857,333 (236,537) 5,859,647 6,417,618 12,277,265 Liabilities Amortization of goodwill based on future profitability 723,336 (651) 722,685 (463) 722,222 Tax depreciation 1,009,912 893,115 1,903,027 1,834,142 3,737,169 Temporary adjustments 276,700 155,887 432,587 (274,355) 158,232 Business combination 1,302 1,302 1,302 Present value adjustment and amortized cost 57,167 (45,891) 11,276 68,644 79,920 Hedge accounting (419,269) 419,269 1,788,568 (1,788,568) Amortization of fair value adjustments on 444,075 (50,302) 393,773 (114,452) 279,321 Long term incentive plan - LTI (5,843) 5,843 (4,823) 4,823 Health care 43,734 (43,734) (8,020) 8,020 Other 3,783 94,938 (93,284) 5,437 407,069 (408,981) 3,525 2,516,275 665,718 288,094 3,470,087 3,696,310 (2,184,706) 4,981,691 Net 722,576 2,191,615 (288,094) (236,537) 2,389,560 2,721,308 2,184,706 7,295,574 Presentation in the balance sheet: Non-current assets 1,104,158 2,662,596 8,529,972 (-) Non-current liabilities 381,582 273,036 1,234,398 (i) Temporary provisions include the deferred tax on provision for geological event in Alagoas (R$3,190 million), contingencies (R$424 million), among other provisions. (b.ii) Offset for the purpose of presentation in the statement of financial position 2020 Headquarters (Country) Tax calculation Offsetting Balance Assets Braskem S.A. Brazil 8,626,703 (2,090,002) 6,536,701 Braskem Argentina Argentina 2,850 2,850 Braskem America USA 293,942 (293,942) Braskem Alemanha Germany 47,277 47,277 Braskem Chile Chile 287 287 Braskem Idesa Mexico 3,213,624 (1,356,693) 1,856,931 Braskem Idesa Serviços Mexico 14,765 14,765 Braskem México Serviços Mexico 8,503 8,503 Cetrel Brazil 23,645 (5,269) 18,376 DAC Brazil 45,669 (1,387) 44,282 12,277,265 (3,747,293) 8,529,972 Liabilities Braskem S.A Brazil 2,090,002 (2,090,002) Braskem America USA 1,528,340 (293,942) 1,234,398 Braskem Idesa Mexico 1,356,693 (1,356,693) Cetrel Brazil 5,269 (5,269) DAC Brazil 1,387 (1,387) 4,981,691 (3,747,293) 1,234,398 2019 Headquarters (Country) Tax calculation Offsetting Balance Assets Braskem S.A. Brazil 3,679,547 (2,072,130) 1,607,417 Braskem Argentina Argentina 1,010 1,010 Braskem Alemanha Germany 28,176 28,176 Braskem Chile Chile 162 (162) Braskem Idesa Mexico 2,056,723 (1,117,641) 939,082 Braskem México Serviços Mexico 9,677 9,677 Cetrel Brazil 24,313 (5,846) 18,467 DAC Brazil 60,039 (1,272) 58,767 5,859,647 (3,197,051) 2,662,596 Liabilities Braskem S.A Brazil 2,072,130 (2,072,130) Braskem America USA 271,285 271,285 Braskem Chile Chile 1,913 (162) 1,751 Braskem Idesa Mexico 1,117,641 (1,117,641) Cetrel Brazil 5,846 (5,846) DAC Brazil 1,272 (1,272) 3,470,087 (3,197,051) 273,036 (b.iii) Realization of deferred income tax and social contribution Balance at Realization December 31, 2026 2029 Assets Note 2020 2021 2022 2023 2024 2025 to 2028 thereafter Tax losses (IR) and negative base (CSL) (i) 3,278,184 223,932 362,165 419,451 566,290 629,925 1,076,421 Goodwill amortized 6,520 4,020 323 323 323 323 968 240 Exchange variations (ii) 3,817,615 1,002,396 155,813 81,553 422,587 88,013 1,050,218 1,017,035 Temporary adjustments (iii) 4,996,337 1,444,987 1,033,617 627,483 39,853 17,380 1,432,993 400,024 Business combination (iv) 56,211 28,963 27,248 Tax credits (v) 77,032 77,032 Other 45,366 45,366 12,277,265 2,781,330 1,579,166 1,128,810 1,029,053 735,641 3,560,600 1,462,665 Liabilities Amortization of goodwill based on future profitability (vi) 722,222 330 303 280 913 1,370 1,917 717,109 Tax depreciation (vii) 3,737,169 857,451 666,224 528,555 528,929 311,245 158,330 686,435 Temporary differences (viii) 158,232 17,581 17,581 17,581 17,581 17,581 52,745 17,582 Business combination (ix) 1,302 1,302 Present value adjustment and amortized cost (x) 79,920 3,826 12,279 1,744 8,967 10,494 22,386 20,224 Amortization of fair value adjustments on the assets from the acquisiton of Braskem Qpar 279,321 35,445 35,445 35,445 35,445 35,445 102,096 Other 3,525 3,525 4,981,691 914,633 731,832 583,605 591,835 376,135 337,474 1,446,177 Net 7,295,574 1,866,697 847,334 545,205 437,218 359,506 3,223,126 16,488 Basis for constitution and realization: (i) In Brazil, the use of tax losses is limited to 30% of the taxable profit for the year; however, the balance does not expire. Meanwhile, in Mexico there is no limit on the amount that can be used in the year; however, the tax losses expire in 10 years. The realization of Tax Losses in the consolidated results consider the taxable profit expected by the Company over a 10-year horizon. For the Braskem S.A., this realization is associated with the completion of administrative processes related to years in which such tax losses were sustained. (ii) In Brazil, the Company opted to tax exchange variation of assets and liabilities denominated in foreign currency under the cash method. Thus, this variation will be realized as assets and liabilities are received/paid. For accounting purposes, exchange variation is recognized under the accrual basis, which results in the recognition of deferred IR and CSL. (iii) Accounting expenses not yet deductible for calculating income tax and social contribution, whose recognition for tax purposes occurs in subsequent periods. In 2019 and 2020, the provisioning of expenses arising from the geological event in Alagoas produced a material impact. (iv) Refers to: tax-related goodwill and contingencies recognized from business combinations. Tax realization of goodwill occurs upon the merger of the investments and contingencies arising from write-offs due to the settlement or reversal of the processes involved. (v) Tax credits arising from the balance of tax paid on profit abroad and the worker’s food program. (vi) Goodwill for the future profitability of the merged companies is not amortized since the adoption of Law 11.638/07. Tax realization is associated with the write-off of goodwill due to impairment or upon divestment. (vii) For calculation of IR and CSL, assets are depreciated at rates higher than those used for accounting purposes. As tax depreciation is exhausted, these deferred IR and CSL start to be realized. (viii) Accounting provisions of transaction costs in financing acquisitions. (ix) Fair value adjustments on property, plant and equipment and intangible assets identified in business combinations, whose tax realization is based on the depreciation and amortization of these assets. (x) Additional adjustment, upon adoption of Law 11.638/07, of property, plant and equipment, whose tax realization is based on the depreciation of assets. Annually, the Company revises its projection of taxable income based on its Business Plan (Note 3.2.1). If this projection indicates that the taxable income will not be sufficient to realize the deferred taxes, the amount corresponding to portion of the deferred tax that will not be recovered is written off.

23 Sundry provisions

23 Sundry provisions	12 Months Ended
	Dec. 31, 2020
Sundry Provisions
Sundry provisions	23 Sundry provisions See accounting policies in Note 3.2.3. 2020 2019 Provision for environmental damages (a) 602,490 365,155 Provision for customers rebates (b) 123,465 84,110 Other 148,253 55,941 Total 874,208 505,206 Current liabilities 362,407 203,134 Non-current liabilities 511,801 302,072 Total 874,208 505,206 (a) Provision for recovery of environmental damages Braskem operates in several countries and is subject to different environmental laws and regulations inherent to the operations and activities areas. Remediation expenses are incurred during several years due to their complexity and extension. New information on websites, new technologies or future developments, such as involvement in investigations by regulatory agencies, may require that we reevaluate our potential exposure related to environmental matters. The Company has identified areas where remediation actions will be necessary. Due to the high complexity in identifying potential environmental impacts, alternative solutions and recovery costs estimations, these estimates can only be made with reasonable assurance after the completion of all phases of the process to identify and investigate environmental liabilities, which are in accordance with the phases and protocols established by environmental agencies. The Company monitors the areas under study to capture any new facts and changes in circumstances that change the prognosis of actions to be adopted and consequently affect the estimation of provision for environmental remediations. (b) Rebates Some sales agreements of Braskem provide for a rebate, in products, should certain sales volumes be achieved within the year, six-month period or three-month period, depending on the agreement. The bonus is recognized monthly in a provision, assuming that the minimum contractual amount will be achieved. As it is recognized based on contracts, the provision is not subject to significant uncertainties with respect to their amount or settlement. (c) Changes in provisions Recovery of environmental Rebate damage Other Total December 31, 2018 88,026 307,546 28,970 424,542 Additions, monetary adjustments and exchange variation 74,299 144,617 34,194 253,110 Write-offs through usage and payments (78,215) (87,008) (7,223) (172,446) December 31, 2019 84,110 365,155 55,941 505,206 Additions, monetary adjustments and exchange variation 150,132 306,274 119,831 576,237 Write-offs through usage and payments (110,777) (68,939) (27,519) (207,235) December 31, 2020 123,465 602,490 148,253 874,208

24 Contingencies

24 Contingencies	12 Months Ended
	Dec. 31, 2020
Disclosure Of Contingencies Abstract
Contingencies	24 Contingencies Braskem is a defendant in lawsuits and administrative proceedings arising from the normal course of its business. These claims are of a tax, labor and social security, civil and corporate nature. Proceedings assessed as having a probable chance of loss are provisioned for, as described in Note 3.2.3. Proceedings assessed as having a possible chance of loss are not provisioned for. In addition, Braskem also is a plaintiff to several lawsuits. In these cases, the Company discloses the contingent asset when the receipt of economic benefits is probable. However, when the realization of the benefit is virtually certain, the related asset no longer constitutes a contingent asset, and as such amount is recognized. Any changes in the court’s understanding of the position could cause future impacts on the financial statements of the Company due to such proceedings. 24.1 Claims with probable chance of loss and contingent liabilities arising from business combinations 2020 2019 Labor claims (a) 280,066 315,437 Tax claims (b) Normal operations IR and CSL 57,662 22,284 PIS and COFINS (i) 226,742 196,356 ICMS 14,104 70,645 Other tax claims 19,759 18,475 318,267 307,760 Business Combination IR and CSL 3,680 3,581 PIS and COFINS (ii) 65,041 63,291 ICMS - interstate purchases (iii) 305,747 297,456 374,468 364,328 Corporate claims (c) 126,057 118,485 Civil claims and other 52,229 45,514 1,151,087 1,151,524 (a) Labor claims The provision on December 31, 2020 is related to 529 labor claims, including occupational health and security cases (604 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors, estimate that the term for the termination of these types of claims in Brazil exceeds five years. The estimates related to the outcome of proceedings and the possibility of future disbursement may change in view of new decisions in higher courts. (b) Tax claims On December 31, 2020, the main claims are the following: (i) Non-cumulative PIS and COFINS The Company is charged amounts arising from compensation of Non-Cumulative PIS and COFINS tax credits in the years from 2005 to 2010 and from 2012 to 2016 that were not approved by the Federal Revenue Service of Brazil ("RFB"), mainly related to the following topics: · Offsetting Statements (“DCOMPs”), with credits in amounts that exceeded those declared in the respective Statement of Calculation of Social Contributions (“DACONs”); · freight expenses: not associated with sales operations and/or operations without proven association and contracted in the country, but concerning imported products; · credits arising from the acquisition of property, plant and equipment mostly related to acquired companies, whose documentation was not found; · taxation of taxable revenues incorrectly classified as tax exempt, subject to zero tax rate or not taxed. On December 31, 2020, the balance of this provision was R$197,707 (R$193,139 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors and considering the precedents on the matters at the Administrative Council of Tax Appeals (“CARF”), estimates that the administrative procedures will be concluded in 2025. (ii) PIS and COFINS taxes The Company is assessed for the payment of these taxes in many legal and administrative claims, such as: · Insufficient payment of COFINS for the period from March 1999 to December 2000, from February 2001 to March 2002, from May to July 2002 and September 2002 due to alleged calculation errors, and non-compliance with the widening the tax calculation base and increasing the contribution rate envisaged in Law 9.718/98; · Offset of the COFINS dues relating to September and October 1999 using the credit resulting from the addition of 1% to the COFINS rate; · Rejection of the offset of PIS and COFINS dues relating to the period from February to April 2002 using the PIS credits under Decree-Laws 2.445 and 2.449, calculated between June 1990 and October 1995, under the argument that the time period for using said credits had expired; and · Alleged non-taxation of revenue from foreign exchange variations, determined as a result of successive reductions in the capital of the associated company. On December 31, 2020, the balance of this provision was R$65,041 (R$63,291 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors. Management estimates the administrative procedures will conclude in 2023 and the court decisions in 2030. Guarantees were offered for court claims in the form of bank guarantee and finished products, which, together, cover the amount of claims. (iii) ICMS - interstate purchases In 2009, the merged company Braskem Qpar was assessed by the Finance Department of the State of São Paulo for the payment of ICMS in view of allegedly committing the following violations: · Undue use of ICMS tax credits in the amount of R$58,164, due to the recording of credits indicated in the invoices for the sale of “acrylonitrile,” “methyl acrylate” and “methyl methacrylate,” issued by Acrinor Acrilonitrila do Nordeste S/A and Proquigel Química S/A, since the products were to be exported, and were therefore exempt from payment of ICMS tax; · The fine for the abovementioned tax offense corresponds to 100% of the principal value recorded, as per Article 527, item II, sub-item “j” jointly with paragraphs 1 and 10 of RICMS/SP; · Fine in the amount of 30% on R$480,389, which corresponds to the sum of the amounts indicated in tax documents whose outflow of goods was not identified by the tax authority, entered based on the provisions of Article 527, item IV, sub-item “b” jointly with paragraphs 1 and 10 of RICMS/SP; and · Fine due to lack of presentation of tax documents requested under a specific deficiency notice, as per Article 527, item IV, sub-item “j” jointly with paragraphs 8 and 10 of RICMS/SP. After ending the discussions in the administrative sphere in 2015 with the partial reduction in contingency, the Company proposed lawsuits to continue the discussion. On December 31, 2020, the balance of this provision was R$305,747 (R$297,456 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors. Management estimates the legal procedures will conclude in 2026. These lawsuits are secured by a guarantee insurance. (c) Corporate claims It is an ordinary collection claim combined with a request for damages for losses, in which a former shareholder requests the payment of dividends and a share bonus arising from the class "A" preferred shares of the dissolved company Salgema Indústrias Químicas S.A. Once the claims were granted, the amount effectively owed by Braskem began to be calculated. During this phase, the judge recognized that dividends and bonus related to the years prior to 1987 had become time-barred. However, the Alagoas State Court of Appeals reviewed the decision to include that the amounts related to such period also were owed by Braskem. Against the decision, Braskem filed a Special Appeal with the Superior Court of Justice (“STJ”), which was partially granted. Currently, the Company awaits the decision of the STJ regarding the merits of the appeal (i.e., the time-barring of the right of the shareholder to receive dividends for said period). On December 31, 2020, Braskem recognized a provision for a possible negative ruling of R$66,957 (R$64,305 in 2019). (d) Changes in claims with probable chance of loss Corporate Civil claims Labor claims Tax claims claims and other Total December 31, 2018 177,751 607,079 111,049 69,438 965,317 Additions, monetary adjustments and exchange variation 322,102 98,618 7,436 11,465 439,621 Payments (83,189) (6,348) (3,918) (93,455) Reversals (101,227) (27,261) (31,471) (159,959) December 31, 2019 315,437 672,088 118,485 45,514 1,151,524 Additions, inflation adjustments and exchange variation 140,386 130,302 10,242 32,207 313,137 Payments (42,174) (21,649) (9,166) (72,989) Reversals (133,583) (88,006) (2,670) (16,326) (240,585) December 31, 2020 280,066 692,735 126,057 52,229 1,151,087 24.2 Claims and contingent liabilities with possible chance of loss Note 2020 2019 Tax claims (a) 11,911,746 6,199,283 Civil claims - Alagoas 26 796,712 33,973,320 Civil claims - Other (b) 708,120 769,126 Labor claims (c) 663,448 642,229 Environmental claims (d) 507,973 166,897 Social security claims (e) 326,730 29,830 Other lawsuits (f) 530,927 350,016 Total 15,445,656 42,130,701 (a) Tax IR and CSL – Exchange variation on naphtha imports In December 2017 and December 2020, the Company received a tax deficiency notice related to the disallowance of exchange variation expenses between the due date of commercial invoices and the effective payment of obligations related to naphtha imports, related to calendar years 2012 and 2015, respectively. Regarding calendar year 2012, disallowances led to the adjustment of tax losses and social contribution tax loss carryforwards. For 2015, a tax credit was registered accompanied by a qualified fine corresponding to 150% of the amount of the tax deficiency notice. The tax deficiency notice issued in December 2020 also resulted in partial disallowance of the cost of naphtha imported from its subsidiary abroad, in an amount corresponding to the profit margin calculated by the subsidiary in the naphtha resale operations, carried out in 2014 and 2015. The adjusted amount as of December 31, 2020 of said uncertain tax treatment is approximately R$1 billion. Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that: i) the probability of loss is possible given the regularity of using trading in import operations; the exchange variation expense is accessory to the principal and, therefore, deductible; fluctuations in exchange rates are not predictable; there are errors in the calculation of the subsidiary’s profit margin; ii) the administrative proceedings will be concluded in 2026. ICMS – Credit reversal on output with tax deferral In July and December 2020, the Company was notified, by the State of Alagoas, due to the lack of ICMS tax payment arising from the alleged lack of reversal of the tax credited in operations prior to outflows with tax deferral. On December 31, 2020, the adjusted value of these cases was R$569 million. Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that: i) the probability of loss is possible due to court precedents and evidence produced; and that the deferral is not a tax benefit and the establishment notified does not receive incentives, therefore the credit reversal is not necessary (whose maintenance, in addition, is assured by the legislation in force on said date); ii) the administrative proceedings should be concluded by 2025. Tax on Financial Operations (“IOF”) The Company was a party to claims for the collection of IOF tax debits in administrative proceedings and lawsuits, which claimed: (i) non-payment of IOF on operations relating to Advances for Future Capital Increase (AFAC) and checking accounts conducted by the merged companies Quattor Participações S.A. and Quattor Química S.A., which were considered loans by Brazilian Federal Revenue; and (ii) requirement to pay IOF/credit on fund transfers and receipts between the Company and CPN Incorporated through a checking account contract and the single cash management related to the period from May 2002 to April 2004. In April 2020, the administrative decision that deemed invalid the claim discussing the characterization of loans in AFAC operations and checking accounts became final and unappealable, reducing this contingency by R$108 million. On December 31, 2020, the updated value of the remaining claims related to the topic corresponded to R$59 million. The external legal advisors of the Company estimate that the administrative proceedings should be concluded by 2027. The Company offered guarantee that cover the full amount in litigation. IRPJ and CSLL – Foreign earned income – Braskem America In July 2020, the Company was notified by the Federal Revenue Service for not subjecting to taxation the income earned abroad by its subsidiary Braskem America Inc. in fiscal year 2015, given the nonconsideration of the tax credits obtained by this foreign subsidiary. The notification also involves allegations of undue offset of social contribution tax loss carryforwards for fiscal year 2016, due to the nonexistence of balances, given the disallowances arising from tax deficiency notices and the applications under tax amnesty programs. At December 31, 2020, the updated amount of the taxes and tax effects from disallowances of income tax losses and social contribution tax loss carryforwards under said tax deficiency notice was R$279 million. Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that this administrative proceeding should be concluded by 2025. IRPJ and CSLL – Foreign earned income – Braskem Holanda The Company received a deficiency notice from Brazilian Federal Revenue Service, referring to fiscal years 2015 and 2016, stating its disagreement with the application of the Agreement between Brazil and the Netherlands to avoid double taxation, which establishes that profits earned by Dutch companies cannot be taxed in Brazil. Braskem’s management, based on the assessment of its external legal advisors, understands that the profits earned by its subsidiary abroad are exempt from taxation in Brazil under Article 7 of said Agreement between Brazil and the Netherlands to avoid double taxation. It is pending in the administrative sphere. The updated amount as of December 31, 2020 of the uncertain tax treatment is approximately R$3.7 billion. The administrative proceeding should be concluded by 2025. PIS, COFINS: taxation of liability reductions settled in connection with the installment plan under Provisional Executive Order (“MP”) 470/09 The Company received notice for not applying to PIS and COFINS taxes the reductions for fines and interest, in view of the adoption of the installment plan offered under MP 470/09. On December 31, 2020, the updated value of this proceeding amounted to R$892 million. Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that the probability of loss is possible, since the liability reductions arising from the amnesty and tax installment program, offered by the Federal Government, are not income taxable by PIS and COFINS and, even if so, should be considered financial income taxable, at the time, at a rate of zero. The administrative proceeding should be concluded by 2021. IR and CSL – Charges with goodwill amortization The Company was served by the RFB for deducting amortization charges, from 2007 to 2013, relating to goodwill originated from acquisitions of shareholding interests in 2002. In that year, several business groups divested their petrochemical assets, which enables the consolidation of those petrochemical assets and consequently the formation of Braskem. After definitive reductions made in the administrative instance, on December 31, 2020, the updated contingency is R$1 billion. Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that: (i) the probability of loss is possible, since the equity interests were acquired with effective payment, a business purpose and the participation of independent parties; (ii) these administrative proceedings should be concluded by 2022, while the only current court proceeding should be concluded by 2030. The Company offered a performance bond that covers the total amount involved in the court proceeding. Non-cumulative PIS and COFINS taxes The Company received a deficiency notice from the RFB due to the use of non-cumulative PIS and COFINS tax credits in the acquisition of certain goods and services consumed in its production process. The matters whose chance of loss is deemed as possible are mainly related to the following: (i) effluent treatment services; (ii) charges on transmission of electricity; (iii) freight for storage of finished products; (iv) extemporaneous credits from various acquisitions; and (v) property, plant and equipment. These matters have already been contested at the administrative and court level and comprise the period from 2006 to 2016. On December 31, 2020, the amount under discussion of these notices is R$1.3 billion (R$1.2 billion in 2019). The Management of Braskem, based on its assessment and of its external legal advisors, estimates that: (i) the administrative proceedings should be concluded by 2025, while the lawsuits should be concluded by 2030; and (ii) in the event of an adverse ruling for the Company, which is not expected, these contingencies could be settled for up to 50% of the amounts in dispute. These estimates are based on the probability of loss of the Company's defense thesis, based on previous administrative and court precedents. The Company offered a performance bond that covers the total amount involved in the only current court proceeding. Income Tax (IR) and Social Contribution (CSL) – Unlimited offsetting In December 2009 and March 2017, the Company received tax deficiency notices claiming that the methodology used to offset tax losses and tax loss carryforwards that failed to observe the limit of 30% of the Taxable Profit and Social Contribution calculation base when offsetting such liabilities with Corporate Income Tax and Social Contribution liabilities in merger operations, respectively, in November 2017 and August 2013. On December 31, 2020, the updated value of the contingency amounted to R$352 million (R$348 million in 2019). Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that: (i) the probability of loss is possible for these proceedings, since the noncompliance with the 30% limit mentioned above was exclusively due to the last Corporate Income Tax Statements (DIPJ) submitted by the Company, which was dissolved due to its merger into Braskem S.A.; (ii) the court proceedings should be concluded by 2030. The Company offered performance bonds that cover the total amount involved in the court proceeding. ICMS The Company is involved in many ICMS collection claims drawn up in the States of São Paulo, Rio de Janeiro, Rio Grande do Sul, Bahia, Pernambuco and Alagoas, which materialized in administrative and court proceedings. The matters assessed as possible losses include the following topics: · ICMS credit on the acquisition of assets that are considered by the Revenue Services as being of use and consumption. The Revenue Service understands that the asset has to be a physically integral part of the final product to give rise to a credit. Most of the inputs questioned do not physically compose the final product. However, the Judicial branch has a precedent that says that the input must not necessarily be an integral part of the finished product, and can be consumed in the production process. · ICMS credit arising from the acquisition of assets to be used in property, plant and equipment, which is considered by the Revenue Services as not being related to the production activity, such as laboratory equipment, material for the construction of warehouses, security equipment, etc. · internal transfer of finished products for an amount lower than the production cost; · omission of the entry or shipment of goods based on physical count of inventories; · lack of evidence that the Company exported goods so that the shipment of the goods is presumably taxed for the domestic market; · non-payment of ICMS on the sale of products subject to tax substitution method and credit from acquisitions of products subject to tax substitution; · fines for the failure to register invoices; · nonpayment of ICMS tax on charges related to the use of the electricity transmission system in operations conducted in the Free Market of the Electric Power Trading Chamber; and · usage of ICMS tax base below the level envisaged in legislation for internal transfers to another unit in the State of Alagoas of DCE (dichloroethane), between January 2013 and May 2016, which is a product that is not subject to deferral in such transactions. The payment represents 30% of the total contingency. On December 31, 2020, the adjusted value of these proceedings was R$883 million (R$740 million in 2019). The Management of Braskem, based on its assessment and of its external legal advisors, estimates that: (i) these administrative proceedings are expected to be terminated in 2025, while the court proceedings are expected to be terminated in 2030; and (ii) in the event of an unfavorable decision to the Company, which is not expected, these contingencies could be settled for up to 50% of the amounts in dispute. This estimate is based on the probability of loss of the Company’s defense theory taking into consideration the case law at the administrative and judicial levels. The Company offered performance bonds that cover the total amount involved in the current court proceedings. PIS and COFINS sundry The Company is involved in collection actions related to PIS and COFINS assessments in the administrative and judicial courts, with possible probability of loss, which discuss the alleged undue offsetting of credits arising from other administrative proceedings and lawsuits, including: (i) Income Tax prepayments; (ii) FINSOCIAL; (iii) tax on net income (ILL); (iv) PIS-Decrees – Federal Laws 2.445 and 2.449; and (v) the COFINS tax arising from the undue payment or payment in excess. On December 31, 2020, the adjusted amounts involved of these assessments total R$130 million. The Management of Braskem, based on its assessment and of its external legal advisors, estimates that: (i) these judicial proceedings are expected to be terminated in 2024; and (ii) in the event of an unfavorable decision to the Company, these contingencies could be settled for up to 50% of the amounts in dispute. This estimate is based on the probability of loss of the Company’s defense theory taking into consideration the case law at the administrative and judicial levels. The Company offered guarantees that cover the total amount involved in the current court proceedings. IRRF, IR and CSL – Commission expenses In December 2017, the Company received a tax deficiency notice from the Brazilian Federal Revenue arising from: (i) the disallowance of commission expenses paid by Braskem in 2011; (ii) the disallowance of commission expenses paid by Braskem Inc. in 2013 and 2014; (iii) lack of payment of withholding income tax (IRRF) on the payments referred to in the previous item; and (iv) the disallowance of advertising expenses incurred in 2013. On December 31, 2020, the updated amount of taxes and tax effects from disallowances of income tax losses and social contribution tax loss carryforwards through said tax deficiency notice is R$139 million (R$133 million in 2019). The assessment of possible loss in this claim is based on the following: (i) the expenses incurred in 2011 already are subject to the statute of limitations. Furthermore, the tax credit recognized by the Brazilian Federal Revenue considered the sum of the disallowances disputed in other administrative proceedings that are pending a final decision, which do not belong in the claim in question; (ii) the expenses incurred by Braskem INC already were paid by the Company itself, which led only to the reduction of its tax loss backlog, without the need to pay additional taxes; (iii) the IRRF claimed by the Brazilian Federal Revenue aims to reach a taxpayer located abroad, which as such is not subject to Brazilian tax law; and (iv) the disallowed advertising expenses are related to the Company’s business activities. Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that this administrative proceeding should be concluded by 2022. Isolated fine – failure to ratify DCOMPS In 2016 through 2020, the Company received notifications of individual fines imposed due to the use of credits from: (i) non-cumulative PIS/COFINS taxes; (ii) negative balances of IRPJ/CSLL taxes; (iii) REINTEGRA credits; and iv) other credits, for offsets not approved by the Brazilian Federal Revenue. On December 31, 2020, the updated value of these deficiency notices amounted to R$345 million (R$289 million in 2019). Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that: (i) the probability of loss is possible, due to favorable court precedents, especially in the judicial sphere; (ii) these administrative proceedings should be concluded by 2025, while the only current lawsuit should be concluded by 2030. The Company offered a performance bond that covers the total amount involved in the judicial proceeding. IRPJ/CSLL – Negative Balance – Offset The Company claims, at the administrative and judicial levels, that RFB denies offsets seeking to settle federal taxes with credits arising from negative balance of IRPJ and CSLL. On December 31, 2020, the updated value of the taxes whose offset was not approved amounted to R$182 million (R$196 million in 2019). Braskem’s Management, based on its evaluation and that of its external legal advisors, estimates that: (i) the probability of loss is possible, given the court precedents and the evidence produced in records; (ii) the administrative proceedings should be concluded by 2024, while the court proceedings should be concluded by 2023. The Company offered guarantees that cover the total amount involved in the current court proceedings. PIS and COFINS – DCide-Fuels Tax Offset The Company is a party to lawsuits claiming PIS and COFINS tax liabilities arising from their offset using Cide-Fuels tax credits, as authorized under Federal Law 10.336/2001. On December 31, 2020, the adjusted value of these cases was R$116 million. Braskem’s Management, based on its evaluation and of its external legal advisors, estimates that this proceeding should be concluded by 2030. The Company offered guarantee that cover the total amount involved in the current court proceedings. Foreign exchange gains and deduction of interest paid to related parties – Braskem Mexico In November 2020, the Mexican Tax Administration Services issued their observations from the tax audit performed for the fiscal year 2016 on Braskem México Proyectos S.A. de C.V., SOFOM ENR, regarding two matters: (i) the calculation of foreign exchange gains; and (ii) the deduction of interest paid to foreign related parties. The tax audit observation letter received from the tax authority is not a tax assessment nor a conclusion of the audit inspection procedures. Management, based on its assessment and of its external legal advisors, considers that there are reasonable arguments for defending the methodology applied, which is in accordance with the applicable tax rules. The updated amount as of December 31, 2020 of said uncertain tax treatment is R$96.1 million. (b) Civil Excess weight Public-Interest Civil Action filed by the Federal Prosecution Office in Brasilia (“MPF”), with the objective of holding the company liable for damages caused to federal roads by trucks carrying excess weight, involving the amount of R$61.8 million at December 31, 2020 (R$61.2 million in 2019). The action seeks to indemnify the country for collective pecuniary damages and pain and suffering. A decision was rendered in the principal case denying all claims made by the MPF. The case is awaiting judgment of appeal filed by MPF at the STJ. Caustic soda transportation The Company is the defendant in civil lawsuits filed by the owner of a former distributor of caustic soda and by the shipping company that provided services to this former distributor. The claimants seek indemnity for damages related to the alleged non-performance of the distribution agreement by the Company. In June 2020, the parties entered into an agreement in which Braskem undertakes to pay, as indemnification, the amount of R$7.4 million (R$65.8 million in 2019). The agreement was approved and paid in October 2020 and, for such reason, said proceedings were concluded. Resale of solvents In January 2017, the Company became defendant in a civil lawsuit filed by former reseller of solvents, claiming alleged breach of a tacit distribution agreement. The lawsuit is pending judgment. On December 31, 2020, the claims prepared by the other party amounted to R$222.8 million (R$204.6 million in 2019). The risk of this claim is assessed as possible. Recourse action of insurer Action for indemnity filed by the insurer of a client of the Company. The insurer seeks, in recourse, reimbursement for the amount paid to the client under the insurance agreement entered into with the client, whose amount adjusted as of December 31, 2020 is R$84.9 million (R$77.7 million in 2019). According to the Insurer, the losses sustained by the client, reimbursed by the insurer, allegedly were caused by products supplied by Braskem outside of specifications. The action is pending judgment. Hashimoto Public-Interest Civil Action The Public-Interest Civil Action was filed in June 2018 by the São Paulo State Public Prosecutor’s Office against the Company and other firms that operate in the Capuava Petrochemical Complex, claiming the reparation and/or remediation of environmental damages supposedly arising from the emission of pollutants into the air, as well as the joint judgement of companies that comprise said complex seeking environmental moral damages in the inflation-adjusted amount of R$144.4 million (R$126.5 million in 2019). Braskem filed its defense in December 2020. The defense of the other defendants and the subsequent decision of the judge is pending. The Management of Braskem, based on its assessment and of its external legal advisors, believes that the lawsuit possibly will be dismissed within a period of eight years. (c) Environmental Public-Interest Civil Action filed in September 2011 by the Local Government of the city Ulianópolis in Pará State against Braskem and other companies, claiming reparation and/or remediation of environmental damages allegedly resulting from the delivery of waste to the company CBB, which had not disposed of it properly, polluting an area of the Municipality of Município de Ulianópolis, as well as the joint and several liability of these companies for the payment of indemnification for environmental damage in the adjusted amount of approximately R$277 million. The companies filed their defense and the judge’s decision is pending. Management of Braskem, based on its assessment and of its external legal advisors, believes that the lawsuit possibly will be dismissed within a period of eight years. (d) Social security In 2012, the Company withdrew sponsorship of the plans Petros Copesul and Petros PQU, whose private pension entity was Petros, remaining the obligation established under the Sponsorship Withdrawal Instrument to pay the mathematical reserves of Members, pursuant to Complementary Law 109/2001, which was met in 2015. However, after the payment, several beneficiaries filed individual and collective action regarding various claims, such as: (i) Difference of the Individual Withdrawal Fund; (ii) Change in base date; (iii) age limiter; (iv) 90% of supplementation; (vi) Return of Contributions; (vii) Difference in Savings Account Reserve; (viii) Objection against legality of Sponsorship Withdrawal. Currently, this portfolio is composed of 801 (771 in 2019) active cases deemed as possible in terms of financial contingency, representing an estimated disbursement of R$326.7 million (R$29.4 million in 2019). (e) Other lawsuits Incentivized Preferred Shares The Company currently is subject to the liquidation of an award related to a lawsuit filed in 1988, whose decision required Polialden Petroquímica S.A., a company merged into Braskem, to pay certain non-controlling shareholders that hold preferred shares in Polialden the distribution of the remaining net profit of the company. The liquidation of award aims to determine the value of the dividends to be paid in accordance with the terms of the decision. The process is awaiting the start of the expert evidence. This plaintiff is split into several matters. The Company recorded a provision of R$16.9 million for matters whose possibility of an outflow of resources is probable. The ones whose chance of loss is assessed as possible amounted to R$206.4 million. Social security – hazardous agents The Company is a party to other administrative pr

25 Leniency agreement

25 Leniency agreement	12 Months Ended
	Dec. 31, 2020
Leniency Agreement
Leniency agreement	25 Leniency agreement Global Settlement with authorities In the context of allegations of undue payments in connection with Operation Car Wash in Brazil, the Company hired external experts in investigation to conduct an independent investigation into such allegations (“Investigation”) and to report their findings. The Company cooperated and continues to cooperate with government authorities from various jurisdictions, including the Department of Justice of the United States (DoJ), the Securities and Exchange Commission of the United States (SEC), the Federal Prosecution Office (MPF) and the Swiss Office of the Attorney General (OAG). In December 2016, the Company entered into Leniency Agreements with the Federal Prosecution Office (“MPF Agreement”) and with U.S. and Swiss authorities (“Global Settlement”), in the approximate amount of US$957 million (approximately R$3.1 billion, at the time), which were officially ratified as follows: 1. In Brazil, the MPF Agreement was ratified by the 5 th th 2. The agreement with the U.S. Department of Justice (“DoJ”) was confirmed by a U.S. court ruling on January 26, 2017 (“Plea Agreement”). 3. The agreement with the Securities and Exchange Commission (“SEC”) was confirmed on February 28, 2017. 4. The agreement with the Swiss authorities did not require ratification to produce effects; on December 21, 2016, the OAG concluded its investigations and issued an order to conclude the case based on the Company’s collaboration. As disclosed to the market on July 10, 2018 and as per the material fact notice on May 27, 2019, the Company engaged in a process of cooperation and negotiation with the Ministry of Transparency and the Office of The Federal Controller General (“CGU”) and the Office of the Attorney General (“AGU”), which culminated in the execution of the leniency agreement with such authorities on May 31, 2019 (“CGU/AGU Agreement” and, jointly with the Global Settlement, “Agreements”). The CGU/AGU Agreement addresses the same facts that are the subject of the Global Settlement entered into in December 2016 and provides for an additional disbursement of R$409,877 million due to the calculations and parameters adopted by CGU/AGU. As ratified by the Federal, funds under the MPF Agreement were allocated to the payment of the CGU/AGU Agreement (the outstanding installments of the MPF Agreement will benefit from CGU/AGU Agreement and will be updated by SELIC from the signed date of the CGU/AGU Agreement). The AGU, CGU and MPF agreed to allocate most of the amounts received under the Agreements to the reparation of victims of the wrongdoings, including other public authorities and agencies, and to adopt monitoring measures of such third parties with which Braskem comes to start negotiations in connection with the matters under the Agreements, seeking to avoid the duplication of compensation. Of the aggregate amount of the Agreements, the Company already has paid approximately R$2.7 billion, as follows: 1. US$94,894 (R$296,591) to the DoJ, paid on February 8, 2017; 2. US$65,000 (R$206,460) to the SEC, paid on April 27, 2017; 3. CHF30,240 (R$104,307) to the Swiss Office of the Attorney General, paid on June 27, 2017; 4. R$736,445 to the MPF, paid on July 6, 2017; 5. R$267,985 to the MPF, related to the first of six annual installments due by 2023, paid on January 30, 2018; 6. CHF16,065 (R$62,021) to the Swiss Office of the Attorney General, related to the first of four annual installments due by 2021, paid on June 28, 2018; 7. R$278,034 to the MPF, related to the second of six annual installments payable until 2023, paid on January 30, 2019; 8. CHF16,065 (R$58,034) to the Swiss Office of the Attorney General, related to the second of four annual installments payable until 2021, paid on June 27, 2019; 9. R$257,256 paid on January 30, 2020 to the Federal Government corresponding to the annual installment of the leniency agreements entered into with the MPF and with the CGU and AGU, as described above; 10. CHF16,065 (R$92,586) to the Swiss Office of the Attorney General, related to the third of four annual installments payable until 2021, paid on June 30, 2020; and 11. R$302,640 paid on February 1, 2021 to the Federal Government corresponding to the annual installment of the leniency agreements entered into with the MPF and with the CGU and AGU. The amount of outstanding installments is approximately R$1.1 billion and will be paid as follows: 1. CHF16,065 to the Swiss Office of the Attorney General, corresponding to last outstanding annual installments, due on June 30, 2021; 2. Approximately R$1 billion under the MPF Agreement and CGU/AGU Agreement, in four annual installments adjusted by the variation in the SELIC rate and payable until January 30 of 2025. To guarantee payment of the installments of these installments coming due, Braskem gave as collateral assets from its property, plant and equipment corresponding to one annual installment. In 2019, the Company also began negotiations with the Bahia State and Rio Grande do Sul State Prosecution Offices. Both adhered to the MPF Agreement. No additional payments are expected to be made by the Company. The Agreements do not exempt the company from other third parties, with legitimate interest, seeking indemnity for damages caused by the facts covered by the Agreements, including other authorities that seek to impose new pecuniary sanctions or fines or initiate new investigations into the Company. Therefore, even if the Company does not anticipate the need for any additional payment, it cannot guarantee that the total amount agreed will be sufficient for full reparation of all any injured parties. The Company will continue to cooperate with the competent public authorities, while improving its compliance and anti-corruption practices. For the last three years, the Company was subject to external independent monitoring as a result of the Agreements. The monitors were responsible for verifying compliance with the Global Settlement, as well as the efficacy of internal controls, policies and procedures of the Company in reducing the risk of noncompliance with anti-corruption laws. In March 2020, based on the certification report issued by the independent monitors, the MPF confirmed the end of the monitorship, the effectiveness of the Company’s compliance program and the fulfillment of the obligations under the MPF Agreement. Subsequently, on May 13, 2020, the DoJ and the SEC confirmed the conclusion of the monitorship established under the agreements signed on December 21, 2016 (“Agreements”) with said authorities. As per the Material Fact notice disclosed by the Company at the time, “the decision of the DoJ and SEC was based on a final report by the independent monitors that attested to the implementation, by the Company, of all the recommendations for structuring and executing its compliance program and that found said program in compliance with the standards established in the Agreements.” The Company is in compliance with all of its obligations under the Agreements.

26 Geological event - Alagoas

26 Geological event - Alagoas	12 Months Ended
	Dec. 31, 2020
Geological Event - Alagoas
Geological phenomenon - Alagoas	26 Geological event - Alagoas See accounting police in Note 3.2.3. The Company operated, until May 2019, salt mining wells located in the city of Maceió, state of Alagoas, with the purpose of supplying raw material to its chlor-alkali and dichloroethane plant. Right after a geological phenomenon in the region in March 2018, the Company started studies through independent specialist institutions to identify the causes of the geological phenomenon and measures to be taken. In May 2019, the Brazilian Geological Service (“CRPM”) issued a report on the phenomenon claiming its causes were related to Braskem’s salt mining operations. Despite this, the geological phenomenon of unknown causes continued to be investigated, and a series of studies were conducted. In view of these events, on May 9, 2019, Braskem decided to suspend its salt mining activities and the operation of its chlor-alkali and dichloroethane plant. With the support of independent institutions and nationally and internationally renowned specialists, the Company conducted and has been conducting a series of studies focusing on: (i) understanding the geological phenomenon and possible surface effects; and (ii) analyzing the situation of the wells. The studies have been shared with the National Mining Agency (“ANM”) and other pertinent authorities, with which the Company has been maintaining constant dialogue. On November 14, 2019, Braskem presented to the ANM measures for shutting down its salt mining fronts in Maceió, with measures for the closure of its wells, and proposed the creation of a protective area surrounding certain wells as a precautionary measure to ensure public safety. These measures are based on a study conducted by the Institute of Geomechanics of Leipzig (“IFG”), in Germany, an international reference in the geomechanical analysis of areas of salt extraction by dissolution, and are being adopted in coordination with the Brazilian Civil Defense and other authorities. On January 3, 2020, the 3 rd In June 2020, the Company received from the Authorities an official letter informing it of the updating of the Map of Sectors of Damages and Priority Action Lines by the Civil Defense of Maceió (“Civil Defense Map”), which expanded the area to be relocated. On July 15, 2020, the Company and the Authorities signed the First Amendment to the Agreement to incorporate this expansion into the PCF. In September 2020, specialized and independent technical studies commissioned by the Company and carried out by internationally recognized entities (“Studies”) were concluded. The Studies presented the potential impacts from the geological event on the surface of the region, bringing an analysis of scenarios in the short and long run, which include areas identified by the Civil Defense Map of June 2020. The Studies were submitted to the competent Authorities for definition of possible actions to be taken under mutual agreement. Given the update of the Civil Defense Map, in September 2020, the Company and the Authorities agreed to include additional properties in the PCF, with the execution of the Instrument of Resolutions in October 2020. In parallel, as previously disclosed, the Company has been negotiating with the competent authorities the Public-Interest Civil Action for Socio-environmental Reparation proposed by the MPF, related to the geological event in Alagoas. On December 30, 2020, the Company and the Authorities executed: (i) the Second Amendment to the Agreement dated January 3, 2020 (“Agreement for Compensation of Residents”) through which the parties agreed to include in the Financial Compensation and PCF the relocation of additional properties defined by the Map of Sectors of the Civil Defense, which was updated in December 2020 to consider, among other information, the areas with future surface impacts, including in the long term, according to the Studies and comprising the area affected and with potential to be affected by the geological event according to these documents; and (ii) the “Agreement to Dismiss the Public-Interest Civil Action on Socio-Environmental Reparation” and the “Agreement to define the measures to be adopted regarding the preliminary injunctions of the Public-Interest Civil Action on Socio-Environmental Reparation” with the MPF and MPE, the latter as intervening-consenting party (jointly referred to as "Agreement for Socio-Environmental Reparation"), both detailed in Note 26.1(ii). Moreover, the Agreement for Socio-Environmental Reparation envisages the inclusion of other parties, and should be negotiated in the coming months. As assessed by the Company and its external advisors, considering the short- and long-term effects of technical studies and the existing information and better estimates of expenses for implementing several measures connected with the geological event in Alagoas, the provision recorded on December 31, 2020 is R$9,175,777 with R$4,349,931 under current liabilities and R$4,825,846 under non-current liabilities. On December 31, 2019, the provision was R$3,383,067, with R$1,450,476 under current liabilities and R$1,932,591 under non-current liabilities. The following table shows the changes in the provision in the fiscal year: Consolidated Balance at December 31, 2019 3,383,067 Provisions 7,116,146 Constitution of present value adjusment (214,319) 6,901,827 Write-offs (*) (1,181,931) Realization of present value adjusment 72,814 Balance at December 31, 2020 9,175,777 Current liability 4,349,931 Non-current liability 4,825,846 9,175,777 (*) Of this amount, R$1,137,736 refers to payments made and R$44.195 was reclassified to suppliers. The amounts included in the provision may be divided among the following action fronts: a. Support for relocating and compensating the residents and owners of the properties located in the risk protection and monitoring areas, including properties that require special measures for their relocation, such as hospitals, schools and public equipment. For this action front, a provision was accrued in the amount of R$5,227,254 (R$5,194,627 net of adjustment to present value), which comprises expenses related to the relocation actions, such as relocation allowance, rent allowance, household goods transportation and the negotiation of individual agreements for compensation the residents and third parties affected. b. Actions for closing and monitoring the salt wells. Based on the findings of sonar and technical studies, Braskem has defined stabilization and monitoring actions for all 35 existing salt mining wells. For four of them, the recommendation is to be filled with solid material, a process that should take three years. For the other 31 wells, the recommended actions are: conventional closure using the buffering technique, which consists of pressuring the cavity, a method adopted worldwide for cavities post-operation; confirmation of natural filling status; and, for certain wells, monitoring using sonar. The monitoring system implemented by Braskem provides for actions to be developed during and after the closure of wells, which basically are as follows: (i) monitoring using sonar or through pressure and temperature measurement in salt cavities; (ii) subsidence monitoring system; (iii) monitoring of vibrations using seismographs and microseismographs; and (iv) monitoring by tiltmeter and e inclinometer. The actions conducted by the Company are based on technical studies by contracted experts, with the recommendations presented to the competent authorities. The Company is implementing the actions approved by ANM. The plans to close wells have a certain level of uncertainty, given that they may be updated until the cavities reach stabilization. Continuous monitoring is essential for confirming the results of the current recommendations. In addition, the conclusion of the studies to confirm the natural filling of certain cavities and the assessment of the future behavior of cavities to be monitored using sonar could indicate the need for certain additional measures to stabilize them. The total provision for implementing the measures defined for the 35 wells is R$1,610,095 (R$1,585,366 net of adjustment to present value). The amount was calculated based on existing techniques and solutions planned for the current conditions of the wells, including expenses with technical studies and their monitoring. The amount provisions could be changed in the future, in accordance with the results of the monitoring of the wells, the progress of implementing the plans to close wells, the monitoring of the ongoing measures and other possible natural alterations. The definition of the necessary measures for the recovery of areas potentially impacted by the geological phenomena depends on a more concrete diagnosis of the situation of the area and further discussion between the Company and the competent authorities (including the ANM). c. Social and urban actions, in accordance with the Agreement for Socio-environmental Reparation signed on December 30, 2020, allocating R$1,580,000 (R$1,515,498 net of adjustment to present value) for the adoption of actions and measures in vacated areas, urban mobility and social compensation actions, with R$300 million going to indemnification for social damages and collective pain and suffering and possible contingencies related to the actions in the vacated areas and urban mobility actions. d. Additional measures, for which the provision amounts to R$899,934 (R$880,286 net of adjustment to present value), for expenses with: (i) actions related to the Technical Cooperation Agreements entered into with the Civil Defense; (ii) the hiring of external advisors to support the execution of the relocation actions and compensation of the families; (iii) infrastructure to provide services to residents (Residents Center); (iv) expenses with managing the event in Alagoas related to communication, compliance, legal services, etc.; and (v) other matters classified as a present obligation for the Company, even if not yet formalized. The Company’s provisions are based on current estimates and assumptions and may be updated in the future due to new facts and circumstances, including timing changes, extension and way of execution; effectiveness of action plans, and the conclusion of current and future studies that indicate recommendations of experts, and other new developments on the topic. Braskem continues to face and could still face various lawsuits filed by individuals or legal entities not included in the PCF or that disagree with the individual proposal of the agreement, as well as potential claims by public utility concessionaires. The measures related to the mine closure plan are subject to the analysis and approval of ANM, the monitoring of results of the measures and implementation, as well as the changes related to the dynamic nature of geological events. The actions to repair, mitigate or offset potential environmental impacts and damages, as provided for in the Socio-environmental Reparation Agreement, to be financed by Braskem, will be defined after the conclusion of the Environmental Diagnosis, to be conducted by a specialized and independent company. At this time, it is impossible to predict the outcome of these Environmental Diagnosis studies or their potential implications for additional disbursements to the costs already provisioned for by the Company. Furthermore, the Socio-Environmental Reparation Agreement envisages the potential adherence by other parties, including the municipality of Maceió, which is under negotiation and will continue over the coming months. To date, the Company cannot predict the results of any discussions or any of their associated costs. Therefore, the Company cannot eliminate the possibility of future developments related to the topic or related expenses, and the costs to be incurred by Braskem may differ from its estimates. The Company is negotiating with its insurers the coverage of its insurance policies. The payment of compensation will depend on technical assessment of the insurance coverage under these policies, taking into consideration the complexity of the subject. For this reason, no payment of compensation was recognized in the financial statements of the Company. 26.1 Lawsuits pending In the context of this event, the following lawsuits were filed against the Company: (i) Public-Interest Civil Action (ACP) filed by the Alagoas State Prosecution Office (MPE) and the Alagoas State Public Defender’s Office – Reparation for Residents Public-Interest Civil Action for Socio-environmental Reparation claiming the payment of indemnification for damages caused to the buildings and the residents of areas affected in the Pinheiros district and surrounding areas (currently includes the Mutange, Bebedouro and Bom Parto districts), in the total minimum amount of R$6.7 billion, with initial request for provisional measure to freeze the Company’s financial and other assets in the same amount. Successive orders to freeze funds resulted in the court blocking of R$3.7 billion (*) in assets, with the issue by the Company of a performance bond in the total amount of R$6.4 billion. Once the case reached the Federal Courts, the Federal Prosecution Office started to participate in the action. (*) The unfreezing occurred in January 2020. On December 31, 2019, the updated amount is presented in the caption judicial deposits in current assets in the amount of R$2,571,683 and in non-current assets in the amount of R$1,174,424 corresponding to the long-term portion of the payment schedule. The first agreement under the Public-Interest Civil Action for Socio-environmental Reparation was approved on January 3, 2020. The Agreement to Support the Relocation of People in Risk Areas (“Agreement”), entered into by Braskem and the State Prosecution Office (“MPE”), the State Public Defender’s Office (“DPE”), the Federal Prosecution Office (“MPF”) and the Federal Public Defender’s Office (“DPU”, and jointly with the MPE, DPE and MPF, the “Authorities”), establishes cooperative actions for relocating people in risk areas and guaranteeing their safety, which provides support, under the Financial Compensation and Support for Relocation Program (“PCF”) implemented by Braskem, for the population in specified risk areas. The Agreement enabled the unfreezing of the Company’s assets, the replacement of the former performance bond policies for two new policies in the aggregate amount of R$3 billion (with R$2 billion as guarantee of this ACP and R$1billion for guaranteeing the ACP described in item (ii) below) and the cessation of new asset freezing orders. In July 2020, the first Amendment to the Agreement was executed to include properties in the relocation area and support under the PCF, based on the update of the Map of Sectors of Damages and Priority Action Lines by the Civil Defense of Maceió (“Civil Defense Map”). The Company and the Authorities agreed to include properties in the service area in October, as a result of a new update of the Civil Defense Map after the conclusion of the independent technical and specialized studies engaged by the Company, which indicated potential impacts from the geological event on the region’s surface (“Studies”). On December 30, 2020, the Company and the Authorities executed a second amendment to the Agreement (“Agreement for Compensation of Residents”) to dismiss the Public-Interest Civil Action, through which the parties agreed to include in PCF the relocation of additional properties defined in the most recent version of the Civil Defense Map and in the Studies. The Agreement for Compensation of Residents includes the area currently affected by the geological event, according to the Civil Defense, and the areas with potential future impacts indicated in the Studies. The Company estimates that the total number of properties covered by PCF after the execution of the second amendment is around 15,000 properties. Moreover, the Company and the Authorities agreed to: (i) created a technical group to monitor the geological event and study the areas adjacent to the Civil Defense Map for a period of five years; (ii) transfer R$1 billion to Braskem’s bank account specifically to cover the costs of the PCF, in ten monthly installments of R$100 million each, starting in January 2021; and (iii) reduce the performance bond in force, from R$2 billion to R$1.8 billion. With the approval by the courts of the Agreement for Compensation of Residents on January 6, 2021, this Public-Interest Civil Action was dismissed. To implement the actions envisaged in the Agreement, the Company undertook to maintain R$2.7 billion in a checking account (R$1.7 billion under the Agreement and an additional R$1 billion under the Amendment), with minimum working capital of R$100 million, whose transactions will be verified by an external audit company. On December 31, 2020, arising from the costs incurred during 2020 related to the PCF, the balance of this checking account corresponded to R$1,322,725 under current assets. During 2021, the Company will allocate R$1 billion to this checking account, in ten monthly installments of R$100 million starting January 2021, as provided for in the Agreement for Compensation of Residents. (ii) Public-Interest Civil Action filed by the Alagoas State Federal Prosecution Office (MPF-AL) – Social-environmental reparation Public-Interest Civil Action claiming the payment by the Company of indemnification for socio-environmental damages and other collective damages, as well as the adoption of corrective and environmental compliance measures, with preliminary injunction requiring the freezing of assets, suspension of borrowings with the BNDES, formation of an own private fund in the initial amount of R$3.1 billion and the pledging of guarantees in the amount of R$20.5 billion. The original amount of the action, initially at R$28.3 billion, was adjusted by a court decision to R$27.6 billion. In January 2020, the judge of the 3 rd On December 30, 2020, the Agreement for Socio-environmental Reparation was executed, with the Company mainly undertaking to: (i) adopt the necessary measures to stabilize the cavities and monitor the soil; (ii) repair, mitigate or compensate potential impacts and environmental damages arising from salt mining in the municipality of Maceió; and (iii) repair, mitigate or compensate potential impacts and social and urban damages arising from salt mining in the municipality of Maceió, as detailed below: (i) To stabilize the cavities and monitor the soil, the Company will continue to implement the action plans involving the closure of mines prepared by Braskem and pending approval by the ANM, whose measures can be adjusted until the stability of cavities is verified. (ii) Regarding the potential environmental impacts and damages resulting from salt mining in the municipality of Maceió: as agreed with the MPF, the Company hired a specialized independent company to identify and recommend measures for recovering, mitigating or compensating any environmental impacts identified as the result of salt mining activities in Maceió. After the study is concluded, the Company will implement and pay for any measures recommended by the study and agreed upon between the Company and the MPF. Since the study is in progress, we cannot anticipate its outcome or if it will entail additional provisions. (iii) Regarding potential impacts and social and urban damages arising from salt mining in the city of Maceió: to allocate the total amount of R$1,280 million to adopt actions and measures in vacated areas, urban mobility actions and social compensation actions. Moreover, the Company and the MPF agreed to: (i) allocate the additional amount of R$300 million for indemnification for social and collective pain and suffering and possible contingencies related to actions in vacated areas and in urban mobility actions; (ii) constitute a security interest on certain assets of the Company in the amount of R$2.8 billion to replace the performance bond of R$ 1 billion; and (iii) engage specialized consulting firms to support the definition of actions established in the Agreement for Socio-environmental Reparation and the update of the Company’s socio-environmental compliance program. With court approval of the Agreement for Socio-environmental Reparation on January 6, 2021, the Public-Interest Civil Action for Socio-environmental Reparation was dismissed with regard to Braskem. Moreover, this agreement provides for the possibility of including other parties, at the discretion of the main parties. (iii) Action for Damages – Pinheiro District Property Action for Damages filed by Construtora H. Lobo (under court-supervised reorganization), a Contractor that claimed it suffered damages and loss of profits due to an agreement to purchase from Braskem a property in the District of Pinheiro. Said agreement was terminated by Braskem due to lack of payment by the Contractor. Nevertheless, the Contractor claims that Braskem omitted information on the existence of structural problems in the deactivated salt mining wells located on said property. As of December 31, 2020, the amount of this action is R$181 million. The Management, supported by the opinion of the external legal advisors, classifies the probability of loss in this case as possible. (iv) Civil Investigation – Urban Damages On June 19, 2020, the Company took cognizance of the Civil Investigation launched by the Alagoas State Prosecution Office (MPE) to: (i) calculate the extent of the urban damages caused by the geological event that occurred in Maceió; (ii) seek, jointly with those entitled, necessary and adequate architectural solutions for the destination, restoration and or use of the cited empty spaces left in the districts impacted; (iii) calculate, if applicable, potential compensatory liabilities for the damages caused to the urban order. On July 13, 2020, the Company was requested to provide preliminary information on the planned use of the region. The object of this Investigation is similar to that of the Public-Interest Civil Action filed by the Federal Prosecution Office in Alagoas related to socio-environmental damages referred to in item (ii) above. In the Socio-environmental Reparation Agreement, executed on December 30, 2020 with the intervenience of the MPE, the extinction of the investigation was agreed. On January 21, 2021, was determinated the dismissal and the establishment of an administrative procedure was determined, with a view to monitoring and inspecting compliance with the Socio-environmental Reparations Agreement. (v) Individual actions – Indemnifications related to the impacts of subsidence and relocation of areas affected On December 31, 2020, Braskem was defendant in several actions, that, in aggregate, involve the amount of approximately R$573 million, filed by individuals in Brazil and abroad, seeking the payment of indemnifications related to the geological event in Maceió. (vi) Indemnifying actions - Companhia Brasileira de Trens Urbanos (“CBTU”) According to Note 37(c), on February 2, the Company was notified of a preliminary injunction requested by the Brazilian Company of Urban Trains ( Companhia Brasileira de Trens The Management, supported by the opinion of the external legal advisors, classifies the probability of loss in this case as possible. No judicial deposit or any other type of guarantee has been made. 26.2 Industrial activity Since the shutdown of its salt mining activities, the Company has been working to adapt its chlor-alkali plant to operate with solid salt to be acquired in the domestic market and/or imported from other regions. The Company resumed its industrial activities in December 2020.

27 Benefits offered to team mem

27 Benefits offered to team members	12 Months Ended
	Dec. 31, 2020
Disclosure of defined benefit plans [abstract]
Benefits offered to team members	27 Benefits offered to team members 27.1. Short-term benefits The obligations of short-term benefits for employees are recognized as personnel expenses as the corresponding service is rendered. The liability is recognized at the amount of the expected payment if the Company has a legal or constructive obligation to pay the amount due to services rendered by an employee in the past and the obligation can be reliably estimated. 2020 2019 2018 Health care 197,683 181,466 162,338 Private pension 94,302 90,687 84,525 Transport 66,752 67,761 64,714 Feeding 38,400 35,677 33,537 Life insurance 9,875 7,997 5,964 Training 14,892 26,261 27,463 Other 14,117 12,164 12,307 436,021 422,013 390,848 Long-term incentive plan (“ILP Plan”) The fair value at the issue date of share-based payments granted to employees is recognized as personnel expenses, with a corresponding increase in shareholders' equity, during the period the employees acquire the full right to the award. The amount recognized as an expense is adjusted to reflect the number of awards for which there is an expectation that the service and performance requirements will be fulfilled, so that the final amount recognized as an expense is based on the number of awards that effectively fulfill the service and performance conditions on the vesting date. For share-based payment awards with non-vesting conditions, the fair value at the grant date of the share-based awards is measured to reflect such conditions and no further adjustments are made for the differences between the expected and actual results. The fair value of the amount payable to employees related to rights on stock price appreciation, which are settled in cash, is recognized as an expense with a corresponding increase in liabilities during the period in which the employees acquire the full right to the payment. The liabilities are remeasured on each reporting date and on the settlement date, based on the fair value of the rights to stock price appreciation. Any changes in the fair value of the liability are recognized in the income statement as personnel expenses. On March 21, 2018, the Extraordinary Shareholders Meeting approved the Long-Term Incentive Plan to align the interests of its participants with the interests of the Company’s shareholders, as well as to encourage the participants to stay at the Company, with the purpose to provide eligible participants with an opportunity to receive restricted shares in the Company by means of voluntary investment using own funds and their maintenance until the end of the 3-year vesting period. On March 28, 2018, the Board of Directors approved a new program, the “Long-Term Incentive Plan 2018 Program,” under the terms and conditions of the Long-Term Incentive Plan, which includes a list of eligible people, the period for acquisition of own shares by the participants and the number of restricted shares to be delivered to participants as consideration for each share acquired. The maximum number of shares the Company expects to deliver to the participants of the Long-Term Incentive 2019 Program, after the vesting period and provided that the necessary requirements are met, is approximately 728,000 shares. The grant date of the program was April 6, 2018. On March 13, 2019, the Board of Directors approved a new program, the “Long-Term Incentive Plan 2019 Program,” under the terms and conditions of the Long-Term Incentive Plan, which includes a list of eligible people, the period for acquisition of own shares by the participants and the number of restricted shares to be delivered to participants as consideration for each share acquired. The maximum number of shares the Company expects to deliver to the participants of the Long-Term Incentive 2019 Program, after the vesting period and provided that the necessary requirements are met, is approximately 582,000 shares. The grant date of the program was March 19, 2019. On March 19, 2020, the Board of Directors approved a new program, the “ILP Plan 2020,” in accordance with the terms and conditions of th7e ILP Plan, which includes the list of eligible persons, the deadline for acquiring own shares by participants and the number of restricted shares to be delivered to participants as matching contribution for each own share acquired. The maximum number of shares the Company expects to deliver to the participants of the ILP Program 2020, after the vesting period and subject to compliance with all necessary requirements, is approximately 1.82 million shares. The program’s grant date is April 1, 2020. The shares to be delivered by the Company to participants of the ILP Program 2018 are those currently held in treasury or acquired through repurchase programs, and in the event said shares cannot be delivered, the Company will pay participants in cash the amount corresponding to the shares, based on the quote on the stock exchange on the second business day immediately prior to the respective payment date. The fair value of the Company’s consideration is calculated in accordance with the agreed terms. For the eligible people of the Braskem S.A., the fair value considers the price of the class A preferred shares (R$16.27, referring exclusively to the ILP 2020 grant). For the eligible people of subsidiaries abroad, the fair value considers the price of the American Depository Receipts - ADR (US$9.01) on December 31, 2020. The fair value, net of taxes, recorded under shareholders equity on December 31, 2020 is R$11,629 (R$13,573 on December 31, 2019). 27.2. Post-employment benefits 27.2.1. Retirement plans and health plans The Company’s net obligation for defined benefit plans is calculated for each of the plans based on the estimated amount of future benefit that employees will receive in return for services rendered in the current and prior periods. Such amount is discounted to its present value and is reported net of the fair value of any of the plan’s assets. The calculation of the obligation of the defined benefit plan is made annually by a qualified accountant using the projected unit credit method. When calculations result in a potential asset for the Company, the asset to be recognized is limited to the present value of economic benefits available as future plan reimbursements or as a reduction in future contributions to the plan. To calculate the present value of economic benefits, any applicable minimum cost requirements are taken into account. Remeasurements of net obligation, which include: actuarial gains and losses, return on plan assets (excluding interest) and the effects of the asset cap (if any, excluding interest), are immediately recognized in other comprehensive income. The obligations for contributions to defined contribution plans are recognized in profit or loss as personnel expenses when the related services are provided by employees. The contributions paid in advance are recognized as an asset to the extent that a cash reimbursement or a reduction in future payments is possible. For each of the below plans, the Company engaged a specialized company to prepare an actuarial report for measuring its future obligations. (a) Braskem America The subsidiary Braskem America administers the Novamont, which is a closed defined benefit pension plan for the employees of a plant located in the State of West Virginia. On December 31, 2020, there were 37 active participants, 151 employees with deferred benefits along with 170 participants (38 active participants, 157 employees with deferred benefits and 171 assisted participants in 2019) receiving benefits as stated within the current year actuarial report. Due to the current funding levels of the pension plan, Braskem America was not required to contribute to the plan during the 2020 plan year and, therefore, there were no additional cash contributions made by the subsidiary or the participants in 2020 and 2019. (b) Braskem Alemanha (“Germany”) The subsidiary Braskem Alemanha is the sponsor of the defined benefit plans and defined contribution plans of its employees. At December 31, 2020, the plan has 158 participants (158 in 2019) and no contributions were made by Braskem Alemanha of the participants in 2020 and 2019. (c) Braskem Holanda (“Netherlands”) The subsidiary Braskem Holanda is the sponsor of the defined contribution plans of its employees. At December 31, 2020, the plans have 8 participants (8 in 2019) and no contributions were made by Braskem Holanda or the participants in 2020 and 2019. (d) Braskem Idesa The subsidiary Braskem Idesa is the sponsor of defined benefit plans for its team members. At December 31, 2020, the plan was composed of 833 active participants (823 in 2019).The contributions Braskem Idesa made in the year amounted to R$3,037 (R$2,056 in 2019).During 2020 and 2019, there were no contributions from participants. (e) Health plan According to Brazilian laws, the type of health plan offered by the Company, named contributory plan, ensures to the participant who retires or is dismissed without cause the right to remain in the plan with the same assistance coverage conditions they had during the employment term, provided they assume the full payment of the plan (Company’s part + participant’s part). (i) Amounts in statement of financial position 2020 2019 Defined benefit Novamont Braskem America 113,662 80,593 Braskem Idesa 17,243 11,408 Braskem Alemanha and Netherlands 239,955 153,564 370,860 245,565 Health care Bradesco saúde 217,089 224,852 Total obligations 587,949 470,417 Fair value of plan assets Novamont Braskem America (113,662) (79,784) Braskem Alemanha (2,213) (1,558) (115,875) (81,342) Consolidated net balance (non-current liabilities) 472,074 389,075 (ii) Change in obligations Consolidated 2020 2019 2018 Health Benefit Health Benefit Health Benefit insurance plans Total insurance plans Total insurance plans Total Balance at beginning of year 224,852 245,487 470,339 90,679 183,609 274,288 83,233 156,957 240,190 Current service cost 4,678 12,486 17,164 2,698 8,233 10,931 1,398 5,842 7,240 Interest cost 17,097 6,482 23,579 8,663 6,133 14,796 8,293 4,906 13,199 Benefits paid (5,949) (7,409) (13,358) (5,817) (4,677) (10,494) (2,669) (3,845) (6,514) Change plan 8,068 8,068 1,391 1,391 Actuarial losses (gain) (23,589) 25,803 2,214 128,629 38,437 167,066 424 (3,713) (3,289) Exchange variation 87,933 87,933 5,684 5,684 22,149 22,149 Balance at the end of the year 217,089 370,782 587,871 224,852 245,487 470,339 90,679 183,687 274,366 (iii) Change in fair value plan assets 2020 2019 2018 Balance at beginning of year 81,342 67,993 46,415 Actual return on plan assets 15,791 14,329 (3,200) Employer contributions 285 20,544 Benefits paid (4,973) (3,966) (3,712) Exchange variation 23,715 2,701 7,868 Balance at the end of the year 115,875 81,342 67,915 (iv) Amounts recognized in profit and loss Consolidated 2020 2019 2018 Health Benefit Health Benefit Health Benefit insurance plans Total insurance plans Total insurance plans Total Current service cost 4,678 12,486 17,164 2,698 8,233 10,931 1,398 5,842 7,240 Interest cost 17,097 6,482 23,579 8,663 6,133 14,796 8,293 4,906 13,199 Actuarial losses 15,461 15,461 28,936 28,936 2,500 2,500 21,775 34,429 56,204 11,361 43,302 54,663 9,691 13,248 22,939 (v) Actuarial assumptions (%) 2020 2019 2018 Health United Health United Health United insurance States Mexico Germany Netherlands insurance States Mexico Germany Netherlands insurance States Germany Netherlands Discount rate 3.99 2.60 7.25 0.70 0.70 3.60 3.35 7.25 2.00 2.00 5.03 4.45 2.00 2.00 Inflation rate 3.25 n/a 4.00 2.00 2.00 4.00 n/a 4.00 2.00 2.00 4.50 n/a 2.00 2.00 Expected return on plan assets n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Rate of increase in future salary levels n/a n/a 5.00 3.00 3.00 n/a n/a 5.00 3.00 3.00 n/a n/a 3.00 3.00 Rate of increase in future pension plan n/a n/a n/a 1.75 1.75 n/a n/a n/a 1.75 1.75 n/a n/a 1.75 1.75 Aging factor 2.50 n/a n/a n/a n/a 2.50 n/a n/a n/a n/a 2.50 n/a n/a n/a Medical inflation 3.50 n/a n/a n/a n/a 3.50 n/a n/a n/a n/a 3.50 n/a n/a n/a Duration 14.99 n/a n/a n/a n/a 15.32 n/a n/a n/a n/a 19.66 n/a n/a n/a (vi) Fair value of assets hierarchy On December 31, 2020, the balance of the fair value of assets is represented by the assets of the Novamont defined benefit plan, which has a level-1 fair value hierarchy. (vii) Sensitivity analysis Impact on the defined benefit obligation Premise change Premise increase Premise reduction Health United Health United Health United insurance States Mexico Germany Netherlands insurance States Mexico Germany Netherlands insurance States Mexico Germany Netherlands Discount rate 1.0% 1.0% 1.0% 0.5% 0.5% 26,427 15,262 1,502 23,415 1,248 (32,925) (13,210) (1,796) (27,317) (1,446) Real medical inflation n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Rate of increase in future salary levels n/a n/a n/a 0.5% 0.5% n/a n/a n/a 14,158 740 n/a n/a n/a (13,353) (698) Rate of increase in future pension plan 1.0% n/a n/a 0.25% 0.25% (5,335) n/a n/a 6,978 365 5,391 n/a n/a (6,772) (354) Life expectancy 1.0% n/a n/a 1 year 1 year 41,186 n/a n/a 5,985 313 (32,503) n/a n/a (6,247) (327) Mortality rate n/a 10.0% n/a n/a n/a n/a 6,215 n/a n/a n/a n/a (1,662) n/a n/a n/a Health insurance - Impact on cost of services and interests costs Premise change Premise increase Premise reduction Cost of Iterests Cost of Iterests Cost of Iterests services costs services costs services costs Discount rate 1.0% 1.0% 774 22 (1,017) 112 Life expectancy 1.0% 1.0% 654 3,035 (543) (2,395) Rate of increase in future pension plan 1.0% 1.0% 116 393 (120) (397) 27.2.2. Retirement plan - defined contribution The Company and the subsidiaries in Brazil sponsor a defined contribution plan for its team members managed by Vexty, a private pension plan entity. Vexty offers its participants, which are employees of the sponsoring companies, an optional defined contribution plan in which monthly and additional participant contributions and monthly and annual sponsor contributions are made to individual pension savings accounts. For this plan, the sponsors pay contributions to private pension plan on contractual or voluntary bases. As soon as the contributions are paid, the sponsors do not have any further obligations related to additional payments. At December 31, 2020, the number of active participants in Vexty sums 5,834 (5,764 in 2019) and the contributions made by the sponsors in the year amount to R$46,689 (R$50,888 in 2019) and the contributions made by the participants amounted to R$74,980 (R$74,814 in 2019).

28 Equity

28 Equity	12 Months Ended
	Dec. 31, 2020
Shareholders' equity
Equity	28 Equity (a) Capital On December 31, 2020 and 2019, the Company's subscribed and paid up capital stock amounted to R$8,043,222 and comprised 797,218,554 shares with no par value, distributed as follows: Amount of shares Preferred Preferred Common shares shares shares % class A % class B % Total % Novonor 226,334,623 50.11 79,182,498 22.95 305,517,121 38.33 Petrobras 212,426,952 47.03 75,761,739 21.96 288,188,691 36.15 ADR (i) 29,268,378 8.48 29,268,378 3.67 Other 12,907,077 2.86 159,612,179 46.26 500,230 100.00 173,019,486 21.70 Total 451,668,652 100.00 343,824,794 99.65 500,230 100.00 795,993,676 99.85 Treasury shares 1,224,878 0.35 1,224,878 0.15 Total 451,668,652 100.00 345,049,672 100.00 500,230 100.00 797,218,554 100.00 Authorised 535,661,731 616,682,421 593,818 1,152,937,970 (i) American Depositary Receipts traded on the New York Stock Exchange (USA). Changes in shares during the year: Amount of shares Note 2019 Changes 2020 Outstanding shares Common shares 451,668,652 451,668,652 Preferred shares class A (d) 343,823,073 1,721 343,824,794 Preferred shares class B 500,230 500,230 795,991,955 1,721 795,993,676 Treasury shares Preferred shares class A (d) 1,226,599 (1,721) 1,224,878 Total 797,218,554 797,218,554 (b) Capital reserves This reserve includes part of the shares issued in Subsidiary’s several capital increases. This reserve can be used to absorb losses, to redeem, reimburse or purchase shares, and to incorporate into the capital stock. The Company used the balance of this reserve to absorb the loss of the year 2020. (c) Profit reserves (i) Legal reserve Under Brazilian Corporation Law, companies must transfer 5% of net profit for the year to a legal reserve until this reserve is equivalent to 20% of the paid-up capital. The legal reserve can be used for capital increase or absorption of losses. The Company used the balance of this reserve to absorb the accumulated losses of the year of 2020. (ii) Profit retention Under Brazilian Corporation Law, portions of the net income of the year not allocated for distribution to the shareholders or other reserve accounts must be allocated to the income retention account. The Company used the balance of this reserve to absorb the accumulated losses of the year of 2020. (d) Share rights Preferred shares carry no voting rights, but they ensure priority, non-cumulative annual dividend of 6% of their unit value, according to profits available for distribution. The unit value of the shares is obtained through the division of capital by the total number of outstanding shares. As common shares, only class “A” preferred shares will have the same claim on the remaining profit that exceed the minimum mandatory dividend of 6% and will be entitled to dividends only after the priority dividend is paid to preferred shareholders. Only class “A” preferred shares also have the same claim as common shares on the distribution of shares resulting from capitalization of other reserves. Class “A” preferred shares can be converted into common shares upon resolution of majority voting shareholders present at a General Meeting. Class “B” preferred shares can be converted into class “A” preferred shares at any time, at the ratio of two class “B” preferred shares for one class “A” preferred share, upon a simple written request to the Company, provided that the non-transferability period provided for in specific legislation that allowed for the issue and payment of such shares with tax incentive funds has elapsed. In the period, the Company transferred to former employees 1,721 treasury shares as payment for the LTI Program (8,159 in 2019). (e) Accumulated losses The balance of accumulated losses in the year was partially absorbed by the profit reserves and capital reserves, as follows: 2020 Loss for the year (6,691,720) Equity valuation adjustments: 27,043 Other (2,585) Adjusted loss (6,667,262) Absorption through the use of reserves: Revenue reserves Retention of profits 1,174,301 Tax incentive 153,478 Legal reserve 577,476 1,905,255 Capital reserve 232,460 Accumulated losses for the year (4,529,547) (f) Other comprehensive income Attributed to shareholders' interest Deemed cost Defined Foreign and additional Gain (loss) Foreign benefit currency Total indexation of Fair value on interest sales Cash flow plans actuarial translation Braskem Non-controlling PP&E adjustments in subsidiary hedge hedge Gain (loss) adjustment shareholders' interest in (ii) (iii) (i) (iv) (iv) (v) (vi) interest Braskem Idesa Total On December 31, 2017 178,893 (9,404) (6,358,242) (145,267) (52,005) 1,220,533 (5,165,492) (477,975) (5,643,467) Additional indexation Realization by depreciation or write-off assets (40,481) (40,481) (40,481) Income tax and social contribution 13,764 13,764 13,764 Deemed cost of jointly-controlled investment Realization by depreciation or write-off assets (1,458) (1,458) (1,458) Income tax and social contribution 496 496 496 Fair value adjustments Accounts receivable (449) (449) (449) Foreign sales hedge Exchange rate (3,133,346) (3,133,346) 4,170 (3,129,176) Transfer to result 1,200,209 1,200,209 59,143 1,259,352 Income tax and social contribution 664,864 664,864 (18,994) 645,870 Fair value of Cash flow hedge Change in fair value (196,790) (196,790) 7,722 (189,068) Transfer to result 26,964 26,964 10,386 37,350 Income tax and social contribution 59,914 59,914 (5,433) 54,481 Fair value of cash flow hedge from jointly-controlled (RPR) (2,329) (2,329) (2,329) Actuarial loss with post-employment benefits, net of taxes (1,569) (1,569) (1,569) ILP PLan fair value Change in fair value 9,297 9,297 133 9,430 Income tax and social contribution (2,891) (2,891) (2,891) Foreign currency translation adjustment 946,342 946,342 (145,119) 801,223 (Loss) gain from investments (65) (65) 65 On December 31, 2018 151,214 5,957 (9,469) (7,626,515) (257,508) (53,574) 2,166,875 (5,623,020) (565,902) (6,188,922) Additional indexation Realization by depreciation or write-off assets (40,481) (40,481) (40,481) Income tax and social contribution 13,764 13,764 13,764 Deemed cost of jointly-controlled investment Realization by depreciation or write-off assets (1,338) (1,338) (1,338) Income tax and social contribution 455 455 455 Fair value adjustments Accounts receivable 15 15 15 Foreign sales hedge Exchange rate (507,464) (507,464) 116,202 (391,262) Transfer to result 1,585,480 1,585,480 66,787 1,652,267 Income tax and social contribution (344,567) (344,567) (54,897) (399,464) Fair value of Cash flow hedge Change in fair value 7,150 7,150 (23,078) (15,928) Transfer to result 54,450 54,450 16,752 71,202 Income tax and social contribution (21,703) (21,703) 1,898 (19,805) Fair value of cash flow hedge from jointly-controlled (RPR) (978) (978) (978) Actuarial loss with post-employment benefits, net of taxes (109,492) (109,492) (109,492) ILP PLan fair value Change in fair value 19,415 19,415 348 19,763 Income tax and social contribution (5,842) (5,842) (5,842) Foreign currency translation adjustment 220,228 220,228 (83,506) 136,722 (Loss) gain from investments (50) (50) (34) (84) Effect of CPC 42 / IAS 29 - hyperinflation (3,561) (3,561) (3,561) On December 31, 2019 123,614 19,545 (9,469) (6,893,066) (218,589) (163,066) 2,383,492 (4,757,539) (525,430) (5,282,969) Attributed to shareholders' interest Deemed cost Defined Foreign and additional Gain (loss) Foreign benefit currency Total indexation of Fair value on interest sales Cash flow plans actuarial translation Braskem Non-controlling PP&E adjustments in subsidiary hedge hedge Gain (loss) adjustment shareholders' interest in (ii) (iii) (i) (iv) (iv) (v) (vi) interest Braskem Idesa Total On December 31, 2019 123,614 19,545 (9,469) (6,893,066) (218,589) (163,066) 2,383,492 (4,757,539) (525,430) (5,282,969) Additional indexation Realization by depreciation or write-off assets (39,853) (39,853) (39,853) Income tax and social contribution 13,551 13,551 13,551 Deemed cost of jointly-controlled investment Realization by depreciation or write-off assets (1,123) (1,123) (1,123) Income tax and social contribution 382 382 382 Fair value adjustments Accounts receivable 113 113 113 Foreign sales hedge Exchange rate (7,215,247) (7,215,247) (111,363) (7,326,610) Transfer to result 2,547,855 2,547,855 117,932 2,665,787 Income tax and social contribution 1,587,701 1,587,701 (1,965) 1,585,736 Fair value of Cash flow hedge Change in fair value (545,038) (545,038) 7,613 (537,425) Transfer to result (47,223) (47,223) (15,742) (62,965) Income tax and social contribution 200,393 200,393 2,439 202,832 Fair value of cash flow hedge from jointly-controlled (RPR) 1,260 1,260 1,260 Actuarial loss with post-employment benefits, net of taxes (648) (648) 1 (647) ILP PLan fair value Change in fair value 16,452 16,452 (415) 16,037 Income tax and social contribution (4,823) (4,823) (4,823) Foreign currency translation adjustment 3,054,126 3,054,126 (396,084) 2,658,042 Other 3,695 3,695 3,695 Effect of CPC 42 / IAS 29 - hyperinflation 8,077 8,077 8,077 On December 31, 2020 96,571 31,287 (5,774) (9,972,757) (609,197) (163,714) 5,445,695 (5,177,889) (923,014) (6,100,903) (i) Transfer to the income statement when divestment or transfer of control of subsidiary. (ii) Transfer to retained earnings as the asset is depreciated or written-off/sold. (iii) For receivables classified as fair value through other comprehensive income, transfer to the income statement when attainment of jurisdiction or early liquidation. For the ILP Plan, Transfer to retained earnings according to the grace period of the plan. (iv) Transfer to the income statement when maturity, prepayment or loss of efficacy for hedge accounting. (v) Transfer to retained earnings when the extinction of the plan. (vi) Transfer to the income statement when write-off of subsidiary abroad.

29 Earnings per share

29 Earnings per share	12 Months Ended
	Dec. 31, 2020
Earnings per share [abstract]
Earnings per share	29 Earnings per share Basic and diluted earnings (loss) per share is calculated by means of the division of profit for the year attributable to the Company’s common and preferred shareholders by the weighted average number of these shares held by shareholders, excluding those held in treasury and following the rules for the distribution of dividends provided for in the Company’s bylaws, as described in Note 28(d), particularly in relation to the limited rights enjoyed by class “B” preferred shares. In view of these limited rights, this class of share does not participate in losses. In this case, the diluted result takes into account the conversion of two class "B" preferred shares into one class “A” preferred share, as provided for in the bylaws of the Company. Class A preferred shares participate in dividends with common shares after the mandatory dividends has been attributed in accordance with the formula provided for in the Company’s bylaws, as described in Note 28(d) and there is no highest limit for their participation. Diluted and basic earnings (losses) per share are equal when there is profit in the year, since Braskem has not issued convertible financial instruments. The table below show the reconciliation of profit (loss) for the period adjusted to the amounts used to calculate basic and diluted earnings (loss) per share. The table below shows the reconciliation of profit or loss for the period adjusted for the amounts used to calculate basic and diluted earnings per share. Basic and diluted 2020 2019 2018 Profit (loss) for the year attributed to Company's shareholders (6,691,720) (2,540,995) 2,827,650 Distribution of priority dividends attributable to: Preferred shares class "A" 208,450 Preferred shares class "B" 303 208,753 Distribution of 6% ​​of unit price of common shares 273,840 Distribution of excess profits, by class: Common shares 1,331,513 Preferred shares class "A" 1,013,544 2,345,057 Reconciliation of income available for distribution, by class (numerator): Common shares (3,797,070) (1,441,839) 1,605,353 Preferred shares class "A" (2,890,444) (1,097,559) 1,221,994 Preferred shares class "B" (4,205) (1,597) 303 (6,691,719) (2,540,995) 2,827,650 Weighted average number of shares, by class (denominator): Common shares 451,668,652 451,668,652 451,668,652 Preferred shares class "A" 343,823,811 343,820,162 343,808,699 Preferred shares class "B" 500,230 500,230 512,660 795,992,693 795,989,044 795,990,011 (Loss) profit per share (in R$) Common shares (8.4068) (3.1922) 3.5543 Preferred shares class "A" (8.4068) (3.1922) 3.5543 Preferred shares class "B" (8.4068) (3.1922) 0.5910 Weighing of shares 2020 Preferred shares Class "A" Outstanding Weighted shares average Amount at beginning of year 343,823,073 343,823,073 Incentive long term plan payments with treasury shares 1,721 738 Amount at the end of the year 343,824,794 343,823,811 2019 Preferred shares Class "A" Outstanding Weighted shares average Amount at beginning of year 343,814,914 343,814,914 Incentive long term plan payments with treasury shares 8,159 5,248 Amount at the end of the year 343,823,073 343,820,162 2018 Preferred shares Class "A" Class "B" Outstanding Weighted Outstanding Weighted shares average shares average Amount at beginning of year 343,775,864 343,775,864 578,330 578,330 Conversion of preferred shares class "B" to "A" 39,050 32,835 (78,100) (65,670) Amount at the end of the year 343,814,914 343,808,699 500,230 512,660

30 Net revenues

30 Net revenues	12 Months Ended
	Dec. 31, 2020
Revenue [abstract]
Net revenues	30 Net revenues 2020 2019 2018 Sales revenue Domestic market Revenue 43,356,596 38,391,132 42,189,365 Rebates (99,786) (57,315) (45,290) 43,256,810 38,333,817 42,144,075 Foreign market Revenue 26,362,457 23,998,067 26,577,433 Rebates (49,966) (47,723) (58,188) 26,312,491 23,950,344 26,519,245 69,569,301 62,284,161 68,663,320 Sales and services deductions Taxes Domestic market (10,726,404) (9,704,712) (10,219,138) Foreign market (40,383) (31,427) (36,562) Sales returns Domestic market (161,207) (138,749) (148,918) Foreign market (97,813) (85,748) (258,836) (11,025,807) (9,960,636) (10,663,454) Net sales and services revenue 58,543,494 52,323,525 57,999,866 Revenue from sales of products is recognized when the control of assets is transferred to the customer for an amount that reflects the consideration to which the Company expects to be entitled in exchange of these assets. The performance obligations are met at a specific moment in time. The Company does not make sales with continued management involvement. Most of Braskem’s sales are made to industrial customers and, in a lower volume, to resellers. The specific moment when the legal right, as well as the risks and benefits, are substantially transferred to the client is determined as follows: (i) for contracts under which the Company is responsible for the freight and insurance, the legal right and the risks and benefits are transferred to the client when the risk of the goods is delivered at the destination established in the contract; (ii) for agreements under which the freight and insurance are a responsibility of the client, risks and benefits are transferred when the products are delivered to the client’s carrier; and (iii) for contracts under which product delivery involves the use of pipelines, especially basic petrochemicals, the risks and benefits are transferred immediately after the Company’s official markers, which is the point of delivery of the products and transfer of their ownership. The cost of freight services related to sales, transfers to storage facilities and finished product transfers between Braskem establishments are included in cost of sales. (a) Net revenue by country 2020 2019 2018 Brazil 32,369,199 28,523,327 31,801,222 United States 10,848,609 9,416,558 9,887,701 Mexico 2,765,815 2,335,198 4,168,140 Argentina 1,267,967 1,104,044 1,166,191 Singapore 1,183,838 1,162,432 756,069 Germany 1,106,877 1,157,431 1,385,482 Italy 811,787 690,422 650,605 Switzerland 633,512 759,189 315,254 Japan 618,940 240,579 245,208 Luxembourg 592,777 526,768 546,524 Chile 544,329 610,454 686,646 China 496,920 542,209 884,233 Peru 471,847 551,967 540,495 Netherlands 432,897 516,409 293,315 Uruguay 405,946 359,049 155,571 South Korea 360,704 279,900 314,517 Sweden 310,984 296,601 270,062 Canada 297,756 201,635 290,453 Poland 285,714 200,563 260,449 Spain 282,362 344,433 329,458 Paraguay 254,255 194,859 214,959 France 247,062 225,986 135,094 United Kingdom 204,953 359,937 366,328 Bolivia 190,447 231,848 250,048 Taiwan 176,400 191,593 274,566 Colombia 174,381 200,370 363,497 Other 1,207,216 1,099,764 1,447,779 58,543,494 52,323,525 57,999,866 (b) Net revenue by product 2020 2019 2018 PE/PP 41,137,288 34,287,597 37,979,148 Ethylene, Propylene 3,600,276 3,743,581 4,283,709 Naphtha, condensate and crude oil 915,807 676,044 476,311 Benzene, toluene and xylene 3,051,752 2,503,667 2,785,400 PVC/Caustic Soda/EDC 3,134,617 2,692,778 3,167,390 ETBE/Gasoline 2,170,289 2,319,253 2,928,993 Butadiene 1,372,428 1,609,264 2,023,465 Cumene 636,635 723,469 909,409 Solvents 654,793 505,804 248,313 Other 1,869,609 3,262,068 3,197,728 58,543,494 52,323,525 57,999,866 (c) Main clients The Company does not have any revenue arising from transactions with only one client that is equal to or higher than 10% of its total net revenue. In 2020, the most significant revenue from a single client amounts to approximately 2.2% of total net revenues of the Company and refers to the sale of resins.

31 Tax incentives

31 Tax incentives	12 Months Ended
	Dec. 31, 2020
Tax Incentives
Tax incentives	31 Tax incentives (a) Income Tax Since 2015, the Company obtained grant in lawsuits claiming the reduction of 75% of IR on income from the following industrial units: (i) PVC and Chlor-Alkali ( Cloro Soda (b) PRODESIN - ICMS The Company has ICMS tax incentives granted by the state of Alagoas, through the state of Alagoas Integrated Development Program – PRODESIN, which are aimed at implementing and expanding a plant in that state. This incentive is considered an offsetting entry to sales taxes. In 2020, the amount was R$68,893 (R$67,796 in 2019).

32 Other income (expenses), net

32 Other income (expenses), net	12 Months Ended
	Dec. 31, 2020
Other Income Expenses Net
Other income (expenses), net	32 Other income (expenses), net Note 2020 2019 2018 Other income 0 PIS and COFINS credits - exclusion of ICMS from the calculation basis 24.4 310,557 1,904,206 235,919 Tax Credits recovery 0 219,254 3,094 46,179 Fixed assets disposal results 0 - 11,140 93,814 Fine on supply contract of raw material, net (i) 41,134 375,020 386,020 Other 0 179,804 114,974 265,290 0 750,749 2,408,434 1,027,222 0 Other expenses 0 Provision for damages - Alagoas 26 (6,901,828) (3,383,067) - Provision for repairing environmental damage 0 (306,275) (141,536) (89,396) Shutdowns and other plants expenses 0 (67,735) (108,192) (91,380) Provision for losses on the fixed asset 0 (51,590) (158,320) (44,420) Fine on sales contracts 0 (42,322) (104,179) (49,487) Allowance for judicial claims, net of reversals 0 (4,008) (136,135) (83,280) Other 0 (564,863) (415,513) (196,750) (7,938,621) (4,446,942) (554,713) (i) The contractual penalty charged from a supplier for failing to supply feedstock to the subsidiary Braskem Idesa at December 31, 2019 is R$335,281 (R$338,125 in 2018).

33 Financial results

33 Financial results	12 Months Ended
	Dec. 31, 2020
Financial Results
Financial results	33 Financial results 2020 2019 2018 Financial income Interest income 481,059 708,542 530,007 Other 119,125 142,012 59,045 600,184 850,554 589,052 Financial expenses Interest expenses (2,928,803) (2,191,765) (2,084,780) Monetary variations on fiscal debts (138,410) (232,612) (33,429) Discounts granted (81,920) (80,404) (141,223) Loans transaction costs - amortization (172,269) (465,000) (89,982) Adjustment to present value - appropriation (225,889) (348,930) (296,065) Interest expense on leases (164,166) (137,903) Losses on derivatives (809,150) (115,050) (58,102) Other (392,758) (311,121) (303,970) (4,913,365) (3,882,785) (3,007,551) Exchange rate variations, net On financial assets 336,527 (31,137) 1,268,741 On financial liabilities (5,635,238) (1,693,383) (3,525,724) (5,298,711) (1,724,520) (2,256,983) Total (9,611,892) (4,756,751) (4,675,482)

34 Expenses by nature and funct

34 Expenses by nature and function	12 Months Ended
	Dec. 31, 2020
Expenses by nature [abstract]
Expenses by nature and function	34 Expenses by nature and function 2020 2019 2018 Classification by nature: Raw materials other inputs (37,913,921) (37,380,310) (38,889,949) Personnel expenses (3,074,305) (3,004,762) (2,412,118) Outsourced services (2,219,413) (3,242,373) (2,306,048) Depreciation and amortization (4,048,081) (3,632,265) (2,990,577) Freights (2,321,740) (2,204,453) (2,275,375) Costs of idle industrial plants (518,528) (309,742) (138,242) Provision - geological event in Alagoas (6,901,828) (3,383,067) PIS and COFINS credits - exclusion of ICMS from the calculation basis 310,557 1,904,206 235,919 Other general and administrative expenses (1,908,729) (927,294) (942,370) Total (58,595,988) (52,180,060) (49,718,760) Classification by function: Cost of products sold (47,331,414) (45,879,118) (46,576,657) Selling and distribution (1,852,055) (1,783,455) (1,689,179) (Loss) reversals for impairment of trade accounts receivable (55,252) (7,069) 87,008 General and administrative (1,918,747) (2,224,180) (1,793,185) Research and development (250,648) (247,730) (219,256) Other income 750,749 2,408,434 1,027,222 Other expenses (7,938,621) (4,446,942) (554,713) Total (58,595,988) (52,180,060) (49,718,760)

35 Segment information

35 Segment information	12 Months Ended
	Dec. 31, 2020
Disclosure of operating segments [abstract]
Segment information	35 Segment information The Company made changes to its organizational structure with a view to capturing synergies in all regions in which it operates for a more integrated operating performance. As a result of these changes, the Management revised the structure of its internal reporting with a focus on its operational expansion and internationalization with a view to simplifying and streamlining the work and decision-making processes, which led it to adopt a new structure for reporting segments by region. Starting in 2020, Braskem’s organizational structure was formed by the following segments: · Brazil: includes: (i) the production and sale of chemicals at the Camaçari Petrochemical Complex in Bahia, the Triunfo Petrochemical Complex in Rio Grande do Sul, the Capuava Petrochemical Complex in the state of São Paulo, and the Duque de Caxias Petrochemical Complex in the state of Rio de Janeiro; (ii) the supply of electricity and other inputs produced in these complexes to second-generation producers located in the petrochemical complexes; (iii) the production and sale of PE, including the production of green PE made from renewable resources, and of PP; and (iv) the production and sale of PVC and caustic soda. · United States and Europe: operations related to PP production and sale in the United States and Europe, through the subsidiaries Braskem America and Braskem Alemanha, respectively. · Mexico: comprises the activities relation to the PE production and sale in Mexico, through the subsidiary Braskem Idesa. (a) Presentation, measurement and reconciliation of segment results Information by segment is generated in accounting records, which are reflected in the consolidated financial statements. The eliminations stated in the operating segment information, when compared with the consolidated balances, are represented by transfers of inputs between segments that are measured as arm’s length sales. The operating segments are stated based on the results of operations, which does not include financial results, and current and deferred income tax and social contribution expenses. The Company does not disclose assets by segment since this information is not presented to its Chief Operating Decision Maker (“CODM”). Corporate Unit comprises items not allocated directly to the reportable segments and are disclosed to reconcile the segments to the consolidated financial information. (b) Results by segment 2020 Operating expenses Net Cost of Selling, general Results from Other operating sales products Gross and distribuition equity income Consolidated revenue sold profit expenses investments (expenses), net Reporting segments Brazil 40,794,387 (32,498,003) 8,296,384 (1,471,722) - (7,082,604) (257,942) USA and Europe 14,638,660 (12,337,486) 2,301,174 (721,191) - (82,695) 1,497,288 Mexico 4,000,805 (3,075,001) 925,804 (436,859) - (364,259) 124,686 Total 59,433,852 (47,910,490) 11,523,362 (2,629,772) - (7,529,558) 1,364,032 Other segments 302,374 (188,350) 114,024 63,874 (19,398) (320) 158,180 Corporate unit (i) - - - (1,493,479) - 359,071 (1,134,408) Braskem consolidated before 59,736,226 (48,098,840) 11,637,386 (4,059,377) (19,398) (7,170,807) 387,804 Eliminations and reclassifications (1,192,732) 767,426 (425,306) (17,325) - (17,065) (459,696) (Loss) profit before net financial expenses and taxes 58,543,494 (47,331,414) 11,212,080 (4,076,702) (19,398) (7,187,872) (71,892) (i) Includes the amount of R$310,557 related to PIS and COFINS tax credits – exclusion of ICMS from the calculation base (Note 10.c). For the purposes of comparability of the new structure of reportable segments, the Company is presenting the fiscal year ended December 31, 2019 and 2018, as follows: 2019 Operating expenses Net Cost of Selling, general Results from Other operating sales products Gross and distribuition equity income Consolidated revenue sold profit expenses investments (expenses), net Reporting segments Brazil 39,142,561 (35,245,941) 3,896,620 (1,852,908) (4,151,901) (2,108,189) USA and Europe 10,044,263 (8,217,515) 1,826,748 (525,701) (23,859) 1,277,188 Mexico 3,051,440 (2,504,012) 547,428 (351,199) 324,682 520,911 Total 52,238,264 (45,967,468) 6,270,796 (2,729,808) (3,851,078) (310,090) Other segments 296,285 (188,335) 107,950 40,306 10,218 4,175 162,649 Corporate unit (i) (1,533,590) 1,773,267 239,677 Braskem consolidated before 52,534,549 (46,155,803) 6,378,746 (4,223,092) 10,218 (2,073,636) 92,236 Eliminations and reclassifications (211,024) 276,685 65,661 (39,342) 35,128 61,447 Profit before net financial expenses and taxes 52,323,525 (45,879,118) 6,444,407 (4,262,434) 10,218 (2,038,508) 153,683 (i) Includes the amount of R$1,904,206 million related to PIS and COFINS tax credits – exclusion of ICMS tax from the calculation base (Note 10.c). 2018 Operating expenses Net Cost of Selling, general Results from Other operating sales products Gross and distribuition equity income Consolidated revenue sold profit expenses investments (expenses), net Reporting segments Brazil 42,078,175 (35,271,203) 6,806,972 (996,754) (78,912) 5,731,306 USA and Europe 11,725,622 (9,195,745) 2,529,877 (464,567) 68,734 2,134,044 Mexico 4,408,814 (2,958,343) 1,450,471 (337,394) 322,076 1,435,153 Total 58,212,611 (47,425,291) 10,787,320 (1,798,715) 311,898 9,300,503 Other segments 292,435 (173,608) 118,827 (33,728) (888) (103) 84,108 Corporate unit (i) (1,807,033) 470,241 (1,336,792) Braskem consolidated before 58,505,046 (47,598,899) 10,906,147 (3,639,476) (888) 782,036 8,047,819 Eliminations and reclassifications (505,180) 1,022,242 517,062 24,864 (309,527) 232,399 Profit before net financial expenses and taxes 57,999,866 (46,576,657) 11,423,209 (3,614,612) (888) 472,509 8,280,218 (i) Includes the amount of R$501.357 (R$265,438 in “Net revenue" and R$235,919 in “Other operating income (expenses), net”) related to PIS and COFINS tax credits – exclusion of ICMS from the calculation basis (Note 10.c). (c) Property, plant and equipment and intangible assets by segment 2020 2019 Reporting segments Brazil 17,299,352 17,863,336 USA and Europe 7,242,262 4,852,760 Mexico 13,892,609 12,020,051 Total 38,434,223 34,736,147 Unallocated amounts 323,617 341,122 Total 38,757,840 35,077,269

36 Insurance coverage (Unaudite

36 Insurance coverage (Unaudited)	12 Months Ended
	Dec. 31, 2020
Disclosure of types of insurance contracts [abstract]
Insurance coverage	36 Insurance coverage (Unaudited) Braskem contracts Operating Risk insurance policies to cover the domestic and international operations of its plants, as detailed below. In addition, also contracts other insurance policies, including general civil liability, the civil liability of directors and offices (D&O) and Environmental Risks, domestic and international charter operations, charter's liability, etc. The Insurance Program maintained by the Company is consistent with the standards adopted by petrochemical companies operating globally. The policies composing Operating Risk insurance ensure coverage of pecuniary damages and consequent loss of profits of all Braskem plants through a set of clauses named “All Risks.” This insurance is composed of different policies that guarantee the operation in Brazil, Mexico and the USA /Germany, which are effective to October 2021. The table below shows information on the Operating Risk policies in effect. The Maximum Indemnification Limits (“LMI”) by event are determined based on studies of maximum loss scenarios prepared by external consultants, considering the nature of the Company’s activity. Additionally, benchmarks with companies from the same segment are conducted for comparison purposes. Maximum indemnity limit Amount insured (i) Maturity US$ million R$ million US$ million R$ million Units in Brazil October 8, 2021 3,500 18,188 27,961 145,305 Units in United States and Germany October 8, 2021 655 3,404 2,680 13,927 Units in Mexico October 8, 2021 2,742 14,249 5,679 29,512 Total 36,320 188,744 (i) Amount for replacement of assets, inventories and loss of profits; (ii) USA LMI was increased with the startup of Delta’s capacity; (iii) Adjusted amounts in renovation dated April 8, 2020. The risk assumptions adopted are not part of the audit scope and, therefore, were not subject to audit by our independent auditors. These policies provide coverage for material losses arising from fire, explosion and machinery breakdown, etc., and consequential loss of profit, with maximum indemnity periods ranging from 12 and 34 months, depending on the plant and/or coverage. Braskem also carries an insurance policy against general civil liability that guarantees any damages caused to third parties from its operations and products, including any losses caused by sudden pollution. The Company’s new projects are covered by specific Engineering Risk policies and/or construction and assembly clauses included in both Operational Risks and Environmental and General Civil Liability policies.

37 Subsequent events

37 Subsequent events	12 Months Ended
	Dec. 31, 2020
Disclosure of non-adjusting events after reporting period [abstract]
Subsequent events	37 Subsequent events (a) On January 6, 2021, judicial settlements were approved for the dismissal of the Public-Interest Civil Action of Reparation for Residents (Note 26.1(i)) and Public-Interest Civil Action for Socio-environmental Reparation (Note 26.1(ii)) related to the Company. As provided for in the Agreement to dismiss the Public-Interest Civil Action on Socio-Environmental Reparation, the MPE determined, on January 21, 2021, the dismissal of the Investigation related to urban damages (Note 26.1(iv)), with the consequent filing of an administrative procedure to monitor and supervise the compliance with said Agreement. (b) In February and March 2021, lawsuits of the Company involving the exclusion of ICMS tax from the PIS/COFINS tax basis were certified as final and unappealable, which represents the approximate amount of R$1.2 billion to be recognized in the first quarter of 2021, as federal tax credits, presented in Note 10. (c) In February 2021, according to Note 26.1(vi), CBTU presented an amendment to the preliminary injunction to claim the payment of damages in the amount of R$ 222,100, as well as obligations to do, including the construction of a new rail line to substitute the stretch that passes through the vacated area. CBTU attributes to the claim the approximate amount of R$1.3 billion. (d) Due to its strong cash position and with the objective of reducing gross debt, the Company announced in March 2021, the total redemption of the perpetual bond, at face value in the amount of US$500 million, as stated in Note 16(b). (e) As announced by the Company on March 1st, 2021, Braskem Idesa signed the documents disclosed in Note 1 with PEMEX and CENAGAS to allow the continuity of its operations. As a result, the natural gas transportation service was reestablished from this date. The existing ethane supply agreement between Braskem Idesa and PEMEX has not been modified and remains in place.

2 Accounting policies (Policies

2 Accounting policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies
Basis of preparation and presentation of the financial statements	2.1 Basis of preparation and statement of compliance The consolidated financial statements have been prepared under the historical cost convention and were adjusted, when required, to reflect the fair value of assets and liabilities. The preparation of financial statements requires the use of certain estimates. It also requires Management to exercise its judgment in the process of applying the Company’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the financial statements are disclosed in Note 3. The issue of these financial statements was authorized by the Executive Board on May 13, 2021. 2.1.1 Consolidated financial statements The consolidated financial statements were prepared and presented in accordance with the International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”). (a) List of subsidiaries The consolidated information comprises the financial statements of the Braskem S.A. and the following entities: Total and voting interest - % Headquarters 2020 2019 2018 Direct and Indirect subsidiaries BM Insurance Company Limited ("BM Insurance") Bermuda 100.00 100.00 100.00 Braskem America Finance Company ("Braskem America Finance") EUA 100.00 100.00 100.00 Braskem America, Inc. (“Braskem America”) EUA 100.00 100.00 100.00 Braskem Argentina S.A. (“Braskem Argentina”) Argentina 100.00 100.00 100.00 Braskem Europe GmbH ("Braskem Alemanha") Germany 100.00 100.00 100.00 Braskem Finance Limited (“Braskem Finance”) Cayman Islands 100.00 100.00 100.00 Braskem Idesa S.A.P.I. ("Braskem Idesa") Mexico 75.00 75.00 75.00 Braskem Idesa Servicios S.A. de CV ("Braskem Idesa Serviços") Mexico 75.00 75.00 75.00 Braskem Incorporated Limited ("Braskem Inc") Cayman Islands 100.00 100.00 100.00 Braskem India Private Limited ("Braskem India") (i) Índia 100.00 Braskem Mexico Proyectos S.A. de C.V. SOFOM ("Braskem México Sofom") Mexico 100.00 100.00 100.00 Braskem Mexico, S. de RL de CV ("Braskem México") Mexico 100.00 100.00 100.00 Braskem Mexico Servicios S. RL de CV ("Braskem México Serviços") Mexico 100.00 100.00 100.00 Braskem Netherlands B.V. ("Braskem Holanda") Netherlands 100.00 100.00 100.00 Braskem Netherlands Finance B.V. (“Braskem Holanda Finance”) Netherlands 100.00 100.00 100.00 Braskem Netherlands Inc. B.V. (“Braskem Holanda Inc”) Netherlands 100.00 100.00 100.00 Braskem Petroquímica Chile Ltda. (“Braskem Chile”) Chile 100.00 100.00 100.00 Cetrel S.A. ("Cetrel") Brazil 63.70 63.70 63.66 Distribuidora de Água Camaçari S.A. ("DAC") Brazil 63.70 63.70 63.66 Lantana Trading Co. Inc. (“Lantana”) Bahamas 100.00 100.00 100.00 Specific Purpose Entity ("SPE") Fundo de Investimento Caixa Júpiter Multimercado Brazil 100.00 100.00 100.00 Fundo de Investimento Santander Netuno Multimercado Longo Prazo ("FIM Netuno") Brazil 100.00 100.00 100.00 (i) Subsidiary incorporated in May 2020.
Functional and foreign currency	2.2 Functional and foreign currency (a) Functional and presentation currency The functional currency of the Company is the Real. The presentation currency is also Real. All amounts have been rounded to the nearest thousand, unless otherwise indicated. (b) Functional currency other than the Brazilian Real Transactions in foreign currencies are translated into the respective functional currency of the Braskem’s entities at the exchange rates on the transaction dates. Monetary assets and liabilities denominated and measured in foreign currency on the reporting date are re-translated into the functional currency at the exchange rate on said date. Non-monetary assets and liabilities measured at fair value in foreign currency are re-translated into the functional currency at the exchange rate on the date on which the fair value was determined. Non-monetary items that are measured based on the historical cost in foreign currencies are translated at the exchange rate on the date of the transaction. The differences in foreign currencies resulting from conversion are generally recognized in the profit or loss. Assets and liabilities from foreign operations are translated into Brazilian Real at the exchange rates determined on the reporting date. Revenues and expenses from foreign operations are translated into Brazilian Real at the exchange rates determined on the transaction dates. Differences in foreign currencies generated by translation into the reporting currency are recognized in other comprehensive income and accrued in asset valuation adjustments in equity. The results and financial position of an entity whose functional currency is not the currency of a hyperinflationary economy must be translated into the reporting currency. The assets and liabilities for each statement of financial position reported (including the comparative balance sheets) must be translated using the closing quote of the exchange rate on the respective reporting dates, and the income and expenses for each comprehensive statement of operations or statement of operations reported (including comparative statements) must be translated using the exchange rates in effect on the transaction dates. All exchange variation gains and losses must be recognized in other comprehensive income. The subsidiaries with a functional currency different from that of the Braskem S.A. are listed below: Functional currency Subsidiaries Braskem Alemanha Euro BM Insurance, Braskem America, Braskem America Finance, Braskem Holanda, U.S.dollar Braskem Idesa, Braskem Idesa Serviços, Braskem México and Braskem México Serviços Mexican peso Braskem Argentina Argentinean peso Braskem Chile Chilenean peso Braskem India Rupee (c) Exchange variation effects The effects from exchange variation on the Company’s transactions are mainly due to the variations in the following currencies: End of period rate at December 31 Average rate Variation 2020 2019 Variation 2020 2019 2018 2020-2019 2019-2018 U.S. dollar - Brazilizan real 5.1967 4.0307 28.93% 5.1578 3.9461 3.6558 30.70% 7.94% Euro - Brazilizan real 6.3779 4.5305 40.78% 5.8989 4.4159 4.3094 33.58% 2.47% Mexican peso - Brazilizan real 0.2610 0.2134 22.31% 0.2402 0.2049 0.1901 17.22% 7.80% U.S. dollar - Mexican peso 19.9240 18.8858 5.50% 21.5098 19.2568 19.2363 11.70% 0.11% U.S. dollar - Euro 0.8166 0.8926 -8.52% 0.8775 0.8930 0.8471 -1.74% 5.42% (d) Hyperinflationary economy Non-monetary assets and liabilities, Equity and the statement of income of subsidiaries operating in highly inflationary economies are adjusted by the change in the Consumer Price Index of the currency. The non-monetary assets and liabilities recorded at historical cost and the Equity and the results of the subsidiary in Argentina were updated for inflation. The impacts of changes in general purchasing power are reported as finance costs in the statements of profit or loss.
Consolidation	2.3 Consolidation 2.3.1 Business combinations Business combinations are recognized using the acquisition method when control is transferred to the Company. The consideration transferred generally is measured at fair value, as is the identifiable net assets acquired. Any goodwill arising from the transaction is tested annually for impairment loss. Gains on bargain purchase are immediately recognized in the profit or loss. Transaction costs are recognized into the result as incurred, except any costs associated with issuances of debt or equity instruments. Any contingent consideration payable is measured at its fair value on the acquisition date. If the contingent consideration is classified as an equity instrument, it is not remeasured, and the settlement is recognized in equity. Other contingent considerations are remeasured at fair value on each reporting date and subsequent changes to fair value are recognized in the income statement for the fiscal year. 2.3.2 Subsidiaries The Company controls an entity when it is exposed to, or entitled to, the variable returns originating from its involvement with the entity and has the capacity to affect such returns by exercising its power over the entity. The financial statements of subsidiaries are included in the consolidated financial statements as from the date the Company obtains control until the date of the loss of control. 2.3.3 Equity method Investees The Company’s investments in entities with accounting treatment using the equity method consist of their interests in associates. Associates are those in which the Company, directly or indirectly, has significant influence, but not control or joint control, over the financial and operating policies. A joint venture is an arrangement in which the Company has joint control, whereby the Company has rights to the net assets of the arrangement, rather than rights to its assets and obligations for its liabilities. Interests in associates and the joint venture are accounted for using the equity method. They are initially recognized at cost, which includes transaction costs. Subsequent to initial recognition, the consolidated financial statements include the Company’s share of the profit or loss and other comprehensive income of equity-accounted investees, until the date on which significant influence or joint control ceases to exist. 2.3.4 Transactions eliminated in consolidation Intragroup balances and transactions and any unrealized revenues or expenses arising from intragroup transactions are eliminated. Unrealized gains originating from transactions with investees recorded using the equity method are eliminated against the investment proportionately to the Company’s interest in the investee. Unrealized losses are eliminated in the same way as unrealized gains, but only to the extent that there is no evidence of impairment loss.
New or revised pronouncements not yet in effective	2.4 New or revised pronouncements New accounting standards currently in force: - Rental concessions related to COVID-19 (amendments to IFRS 16). - Definition of a Business (amendments to IFRS 3). - Definition of Material (amendments to IAS 1 and IAS 8). - Interest Rate Benchmark Reform (amendments to IFRS 9, IAS 39, and IFRS 7). The Company had no significant impact on its financial statements due to such amendments. Additionally, a series of new standards are effective for annual periods beginnings after January 1, 2020. The Company did not early adopt these standards in the preparation of these financial statements. The following new or amended standards are not expected to have a significant impact on the Company’s financial statements: - Onerous Contracts: costs of fulfilling a contract (amendments to IAS 37). - Property, Plant and Equipment: revenue before intended use (amendments to IAS 16). - Reference to the Conceptual Framework (amendments to IFRS 3). - Classification of Liabilities as Current or Non-Current (amendments to IAS 1). - Annual improvements to IFRS Standards 2010-2020. - Interest Rate Benchmark Reform – Phase 2 (amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16). The amendments address issues that might affect financial reporting as a result of the reform of an interbank offered rate (IBORs), including the effects of changes to contractual cash flows or hedging relationships arising from the replacement of an interest rate benchmark with an alternative benchmark rate. The amendments provide practical relief for certain requirements in IFRS 9, IAS 39, IFRS 7, IFRS 4, and IFRS 16 relating to: (i) changes in the basis for determining contractual cash flows of financial assets, financial liabilities, and lease liabilities; and (ii) hedge accounting. (i) change in the basis for determining contractual cash flows The amendments will require an entity to account for a change in the basis for determining the contractual cash flows of a financial asset or financial liability that is required by interest rate benchmark reform by updating the effective interest rate of the financial asset or financial liability. At December 31, 2020, the Company had loans whose interest rates are based on LIBOR, as disclosed in Note 16, and will be subject to IBOR reform. The Company expects that the benchmark interest rate of these loans will be changed to Security Overnight Financing Rate (“SOFR”) until 2023. (ii) Hedge accounting The amendments provide exceptions to the hedge accounting requirements in the following areas: - Allow amendment of the designation of a hedging relationship to reflect the changes required by the reform. - When a hedged item in a cash flow hedge is amended to reflect the changes required by the reform, the amount accumulated in the cash flow hedge reserve is deemed to be based on the alternative benchmark interest rate applied to the hedged item. At December 31, 2020, the Company has cash flow hedges based on LIBOR. The Company expects that indexation of the hedged items and hedging instruments to sterling LIBOR will be replaced by Sterling Overnight Interbank Average Rate (“SONIA”) in 2021 (refer to note 4.1). Whenever the replacement occurs, the Company expects to apply the amendments relating to hedge accounting. However, there are uncertainties as to how and when a replacement may occur. The Company does not expect the amounts accumulated in the cash flow hedge reserve will be reclassified immediately to the profit or loss due to the transition to IBOR. (iii) Disclosures The amendments will require the Company to disclose additional information on the entity’s exposure to risks arising from the interest rate benchmark reform and the related risk management activities. (iv) Transition The Company plans to apply the amendments from January 1, 2021. The adoption will not affect the amounts reported for 2020 or prior periods.
Main measures and impacts due to COVID-19	2.5 Main measures and impacts due to COVID-19 Braskem has been closely monitoring the impacts from the COVID-19 pandemic on its business and surrounding communities. Braskem has formed a crisis committee to establish global procedures focusing mainly on the health and safety of people and the continuity of its operations. Updates on the measures taken by the Company follow: (i) Determining that all team members and contractors from the Company vulnerable to COVID-19 work remotely until the last phase of return; (ii) Determining that all team members and contractors not directly related to the safe continuity of operations work remotely until the criteria for the start of flexible measures for a safe return are met; (iii) Reducing the number of team members and contractors working on its industrial assets, with operations using the smallest possible teams, while considering all rules for ensuring personal safety and maintaining operational reliability; (iv) Restricting visits by non-routine third parties and suppliers to Braskem’s facilities; (v) Creating agendas jointly with clients and local communities to verify if there are products in its portfolio to help combat the pandemic; (vi) Creating, implementing, and monitoring the indicators of the Plan for Safe Return to Braskem plants and offices. The capacity utilization rates of Brazilian and North American plants reduced in the second quarter of 2020 due to the weaker demand for our products and the destocking trend in the petrochemical and plastics production chain. The demand for resins increased in the third quarter of 2020; therefore, both regions' capacity utilization rates returned to normal levels and kept similar levels up to the end of the year. In Europe and Mexico, the capacity utilization rates returned to their normal levels in the second quarter, following the gradual recovery in demand, resulting in capacity utilization rates of 83% and 80%, respectively. As disclosed in note 1, operational activities in Mexico were termporarilly interrupted in December. With regard to the fourth quarter, despite the recovery in demand begun in the previous quarter, the capacity utilization rate in Europe was 64% due to the scheduled shutdown. During 2020, the Company adopted cash-preservation measures to ensure the financial stability and resilience of its business, which include: • Drawing down a revolving credit facility in the amount of US$1 billion (R$5.2 billion) in April 2020, which comes due in 2023. At the end of July 2020, the Company prepaid the facility in full, in an amount corresponding to R$5.5 billion; • Issuing bonds in the international market by the subsidiary Braskem Holanda, in July 2020, in the amount of US$600 million (R$3.2 billion); • Reducing fixed costs by approximately 9% compared to the same period of 2019; • Reducing the investments planned for 2020 from US$721 million (R$3.9 billion) to US$555 million (R$2.8 billion); • Postponing the payment of social contribution charges in Brazil; and • Optimizing working capital. The Company also highlights the actions carried out jointly with its clients and partner companies to transform chemicals and plastic resins into items that are essential for combatting COVID-19, which include surgical masks, packaging for liquid and gel alcohol, bleach and 3D printing of bands for protective face shields; donations of LPG (cooking gas) to field hospitals; actions to support the chain of clients and suppliers, particularly small and midsized companies; and donations of hygiene kits and food staples to local communities. The Company’s Management reviewed the accounting estimates for the realization of assets, including the estimates for losses on trade accounts receivables, inventory impairment loss, deferred tax assets and other assets, or those related to the provision for liabilities in the financial statements given the significant changes in the risks to which the company is exposed (see more information in note 20.6). The review considered events after the reporting period that occurred up to the reporting date of these financial statements, and no significant effects were identified that should be reflected in the financial statements for the fiscal year ended December 31, 2020. Due to the uncertainties arising from the COVID-19 pandemic with regard to the global economy, it is impossible to accurately predict the adverse impacts on the equity and financial position of the Company and its subsidiaries after the reporting date. With the recovery in demand for resins, the Company has no expectations of additional provisions for impairment testing of its assets in the near future arising from a scenario of demand constraints.

2 Accounting policies (Tables)

2 Accounting policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies
Schedule of subsidiaries and specific purpose entities	The consolidated information comprises the financial statements of the Braskem S.A. and the following entities: Total and voting interest - % Headquarters 2020 2019 2018 Direct and Indirect subsidiaries BM Insurance Company Limited ("BM Insurance") Bermuda 100.00 100.00 100.00 Braskem America Finance Company ("Braskem America Finance") EUA 100.00 100.00 100.00 Braskem America, Inc. (“Braskem America”) EUA 100.00 100.00 100.00 Braskem Argentina S.A. (“Braskem Argentina”) Argentina 100.00 100.00 100.00 Braskem Europe GmbH ("Braskem Alemanha") Germany 100.00 100.00 100.00 Braskem Finance Limited (“Braskem Finance”) Cayman Islands 100.00 100.00 100.00 Braskem Idesa S.A.P.I. ("Braskem Idesa") Mexico 75.00 75.00 75.00 Braskem Idesa Servicios S.A. de CV ("Braskem Idesa Serviços") Mexico 75.00 75.00 75.00 Braskem Incorporated Limited ("Braskem Inc") Cayman Islands 100.00 100.00 100.00 Braskem India Private Limited ("Braskem India") (i) Índia 100.00 Braskem Mexico Proyectos S.A. de C.V. SOFOM ("Braskem México Sofom") Mexico 100.00 100.00 100.00 Braskem Mexico, S. de RL de CV ("Braskem México") Mexico 100.00 100.00 100.00 Braskem Mexico Servicios S. RL de CV ("Braskem México Serviços") Mexico 100.00 100.00 100.00 Braskem Netherlands B.V. ("Braskem Holanda") Netherlands 100.00 100.00 100.00 Braskem Netherlands Finance B.V. (“Braskem Holanda Finance”) Netherlands 100.00 100.00 100.00 Braskem Netherlands Inc. B.V. (“Braskem Holanda Inc”) Netherlands 100.00 100.00 100.00 Braskem Petroquímica Chile Ltda. (“Braskem Chile”) Chile 100.00 100.00 100.00 Cetrel S.A. ("Cetrel") Brazil 63.70 63.70 63.66 Distribuidora de Água Camaçari S.A. ("DAC") Brazil 63.70 63.70 63.66 Lantana Trading Co. Inc. (“Lantana”) Bahamas 100.00 100.00 100.00 Specific Purpose Entity ("SPE") Fundo de Investimento Caixa Júpiter Multimercado Brazil 100.00 100.00 100.00 Fundo de Investimento Santander Netuno Multimercado Longo Prazo ("FIM Netuno") Brazil 100.00 100.00 100.00 (i) Subsidiary incorporated in May 2020.
Schedule of functional currencies	The subsidiaries with a functional currency different from that of the Braskem S.A. are listed below: Functional currency Subsidiaries Braskem Alemanha Euro BM Insurance, Braskem America, Braskem America Finance, Braskem Holanda, U.S.dollar Braskem Idesa, Braskem Idesa Serviços, Braskem México and Braskem México Serviços Mexican peso Braskem Argentina Argentinean peso Braskem Chile Chilenean peso Braskem India Rupee
Schedule of exchange variation effects	The effects from exchange variation on the Company’s transactions are mainly due to the variations in the following currencies: End of period rate at December 31 Average rate Variation 2020 2019 Variation 2020 2019 2018 2020-2019 2019-2018 U.S. dollar - Brazilizan real 5.1967 4.0307 28.93% 5.1578 3.9461 3.6558 30.70% 7.94% Euro - Brazilizan real 6.3779 4.5305 40.78% 5.8989 4.4159 4.3094 33.58% 2.47% Mexican peso - Brazilizan real 0.2610 0.2134 22.31% 0.2402 0.2049 0.1901 17.22% 7.80% U.S. dollar - Mexican peso 19.9240 18.8858 5.50% 21.5098 19.2568 19.2363 11.70% 0.11% U.S. dollar - Euro 0.8166 0.8926 -8.52% 0.8775 0.8930 0.8471 -1.74% 5.42%

3 Application of critical est_2

3 Application of critical estimates and judgments (Tables)	12 Months Ended
	Dec. 31, 2020
Application Of Critical Estimates And Judgments
Schedule of useful life of assets	The useful lives applied to the assets determined the following average (%) depreciation and amortization rates, using the straight-line method: 2020 2019 Buildings and improvements 2.82 6.23 Machinery, equipment and installations 6.31 7.04 Furniture and fixtures 10.03 10.02 IT equipment 20.23 20.60 Lab equipment 9.57 9.52 Security equipment 9.54 9.39 Vehicles 18.89 18.88 Other 13.55 15.72

4 Risk management (Tables)

4 Risk management (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of risk management strategy related to hedge accounting [abstract]
Schedule of cash flows not discounted and may not be reconciled	These amounts are calculated based on cash flows not discounted and may not be reconciled with the amounts disclosed in the statement of financial position. Maturity Until Between one and Between two and More than one year two years five years five years Total Trade payables 9,978,595 7,233 - - 9,985,828 Borrowings 1,439,079 4,365,497 7,953,182 71,000,361 84,758,119 Debentures 56,988 125,320 97,057 - 279,365 Braskem Idesa borrowings 1,194,805 2,340,108 2,911,775 10,212,681 16,659,369 Derivatives 1,314,675 223,813 354,483 - 1,892,971 Loan to non-controlling shareholder of Braskem Idesa - - - 4,747,673 4,747,673 Leniency agreement (Note 25) 399,039 313,562 852,766 - 1,565,367 Lease 870,587 641,313 898,124 1,070,768 3,480,792 At December 31, 2020 15,253,768 8,016,846 13,067,387 87,031,483 123,369,484
Schedule of financial liabilities by maturity	These amounts are gross and undiscounted and include contractual interest payments, therefore may not be reconciled with the statement of financial position. Maturity Until Between one and Between two and More than one year two years five years five years Total Trade payables 9,978,595 7,233 - - 9,985,828 Borrowings 1,439,079 4,365,497 7,953,182 71,000,361 84,758,119 Debentures 56,988 125,320 97,057 - 279,365 Braskem Idesa borrowings 8,064,401 - - 7,785,795 15,850,196 Derivatives 1,314,675 223,813 354,483 - 1,892,971 Loan to non-controlling shareholder of Braskem Idesa - - - 4,747,673 4,747,673 Leniency agreement (Note 25) 399,039 313,562 852,766 - 1,565,367 Lease 870,587 641,313 898,124 1,070,768 3,480,792 At December 31, 2020 22,123,364 5,676,738 10,155,612 84,604,597 122,560,311

5 Cash and cash equivalents (Ta

5 Cash and cash equivalents (Tables)	12 Months Ended
	Dec. 31, 2020
Cash and cash equivalents [abstract]
Schedule of cash and cash equivalents	2020 2019 Cash Domestic market 111,278 13,495 Foreign market (i) 1,835,685 2,289,736 Cash equivalents: Domestic market 8,271,312 1,963,185 Foreign market (i) 3,644,577 2,537,464 Total 13,862,852 6,803,880 (i) On December 31, 2020, it includes cash of R$284,856 and R$619,577 of cash equivalents (R$598,591 of cash and R$418,644 of cash equivalents on December 31, 2019) of the subsidiary Braskem Idesa, which cannot be used by the other subsidiaries of the Company.

6 Financial investments (Tables

6 Financial investments (Tables)	12 Months Ended
	Dec. 31, 2020
Financial Investments
Schedule of financial investments	2020 2019 Amortized cost Time deposit investments 53,941 38,759 Fair value through profit or loss LFT´s and LF´s (i) 2,163,042 1,588,426 Restricted funds investments (ii) 1,338,289 9,708 Other 87,519 60,319 Total 3,642,791 1,697,212 Current assets 3,627,227 1,687,504 Non-current assets 15,564 9,708 Total 3,642,791 1,697,212 (i) These refer to Brazilian floating-rate government bonds (“LFTs”) issued by the Brazilian federal government and floating-rate bonds (“LFs”) issued by financial institutions. These bonds have original maturity above three months, immediate liquidity in the secondary market and Management expects their realization in the short term. (ii) Includes the following amounts: R$1,322,725 in restricted funds used in the program for relocation of residents in Alagoas (Note 26.1(i)); and R$15,564 of bank deposits with yields of approximately 100% of the Interbank Deposit Rate (“CDI”), and their use is related to the fulfillment of the contractual obligations of the debentures.

7 Trade accounts receivable (Ta

7 Trade accounts receivable (Tables)	12 Months Ended
	Dec. 31, 2020
Trade Accounts Receivable
Schedule of trade accounts receivable	At December 31, 2020, the total amount of the trade accounts receivables negotiated was R$1.8 billion (R$2 billion on December 31, 2019), with interest expense of R$12 million recorded under Financial Expenses. Note 2020 2019 Customers Domestic market Third parties 2,304,212 1,049,412 Related parties 9 20,863 8,814 2,325,075 1,058,226 Foreign market Third parties 2,603,140 1,477,748 2,603,140 1,477,748 Allowance for doubtful accounts (i) (173,007) (229,323) Total 4,755,208 2,306,651 Current assets 4,731,979 2,285,750 Non-current assets 23,229 20,901 Total 4,755,208 2,306,651 (i) Company’s expected credit losses are determined based on the following stages:
Schedule of expected credit loss	The following table shows the Company’s expected credit loss for each stage: Estimated loss Trade accounts receivable Allowance for Stage 1 Operation risk 1 Minimum risk 2,976,880 Operation risk 2 Minimum risk 1,121,976 Operation risk 3 0.80% 577,145 4,617 Operation risk 4 1.65% 55,033 908 4,731,034 5,525 Stage 2 Operation risk 1 and 2 Minimum risk 20,619 Operation risk 3 and 4 20% 2,812 562 1st Renegotiation lower than or equal to 24 months 25% 1,273 318 Between 90 and 180 days 30% 8,393 2,518 33,097 3,398 Stage 3 Operation risk 5 100% 12,675 12,675 Above 180 days 100% 10,797 10,797 Legal 100% 140,612 140,612 164,084 164,084 Total 4,928,215 173,007
Schedule of changes in allowance for doubtful accounts	The changes in the allowance for doubtful accounts are presented below: 2020 2019 Balance of provision at the beginning of the year (229,323) (233,625) Provision in the year (65,571) (59,885) Reversal in the year 28,563 45,501 Write-offs 93,324 18,686 Balance of provision at the end of the year (173,007) (229,323)
Schedule of trade accounts receivable by maturity	The breakdown of trade accounts receivable by maturity is as follows: 2020 2019 Accounts receivables not past due 4,368,714 2,001,326 Past due securities: Up to 90 days 396,953 318,852 91 to 180 days 6,272 15,368 As of 180 days 156,276 200,428 4,928,215 2,535,974 Allowance for doubtful accounts (173,007) (229,323) Total customers portfolio 4,755,208 2,306,651

8 Inventories (Tables)

8 Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure Of Inventories Abstract
Schedule of inventory	2020 2019 Finished goods 4,258,561 4,634,192 Raw materials, production inputs and packaging 2,008,510 1,665,797 Maintenance materials 749,536 608,693 Advances to suppliers 86,745 68,382 Imports in transit 1,298,334 664,345 Total 8,401,686 7,641,409 Current assets 8,383,650 7,625,084 Non-current assets 18,036 16,325 Total 8,401,686 7,641,409
Schedule of provision for inventories	The effect of the provision for inventories at the year is shown below: Balance at December 31, 2018 20,159 Additions 72,672 Utilization/reversals (10,636) Balance at December 31, 2019 82,195 Additions 120,483 Utilization/reversals (80,106) Balance at December 31, 2020 122,572

9 Related parties (Tables)

9 Related parties (Tables)	12 Months Ended
	Dec. 31, 2020
Related party transactions [abstract]
Schedule of related party transactions	Balances at December 31, 2020 Balances at December 31, 2019 Novonor and Novonor and subsidiaries Petrobras and subsidiaries Petrobras and Balance sheet and associates subsidiaries Other Total and associates subsidiaries Other Total Assets Current Trade accounts receivable 6,354 14,509 20,863 4,257 4,557 8,814 Inventories 35,998 35,998 17,242 17,242 Dividends and interest on capital 165 165 3,074 3,074 Total assets 42,352 14,674 57,026 21,499 7,631 29,130 Liabilities Current Trade payables 33,100 601,203 9,641 643,944 12,402 133,759 9,819 155,980 Payable notes 58 58 Other payables 478 119 597 1,420 136 1,556 Non-current Loan to non-controlling shareholders of Braskem Idesa 3,222,493 3,222,493 2,395,887 2,395,887 Total liabilities 33,100 601,681 3,232,253 3,867,034 12,460 135,179 2,405,842 2,553,481 Year ended December 31, 2020 Year ended December 31, 2019 Year ended December 31, 2018 Novonor and Novonor and Novonor and subsidiaries Petrobras and subsidiaries Petrobras and subsidiaries Petrobras and and associates subsidiaries Other Total and associates subsidiaries Other Total and associates subsidiaries Other Total Transactions Sales of products 182,521 326,825 509,346 665,417 588,785 1,254,202 1,225,443 736,192 1,961,635 Purchases of raw materials, finished goods services and utilities (133,127) (14,566,840) (20,350) (14,720,317) (293,501) (12,584,453) (10,738) (12,888,692) (460,480) (15,540,144) (3,800) (16,004,424) Financial income (expenses), net (452) (3,810) (818) (5,080) (96) (5) (10,967) (11,068) (49) (106,516) (106,565) Other income (expenses) (34,873) (34,873) 4,214 4,214 General and administrative expenses Post-employment benefits plan ("EPE") Private pension ("Vexty") (46,738) (46,738) (50,889) (50,889) (48,514) (48,514)
Schedule of key management personnel	The expenses related to the remuneration of key management personnel, including the Board of Directors, the Fiscal Council, and the Statutory Executive Board, recorded in the profit or loss for the year, are shown as follows: Statement of profit or loss transactions 2020 2019 2018 Remuneration Short-term benefits 74,943 70,366 60,922 Post-employment benefit 961 1,104 989 Long term incentive plan 7,456 14,724 4,404 Total 83,360 86,194 66,315

10 Taxes recoverable (Tables)

10 Taxes recoverable (Tables)	12 Months Ended
	Dec. 31, 2020
Taxes Recoverable
Schedule of taxes recoverable	2020 2019 Parent Company and subsidiaries in Brazil IPI 1,435 477 Value-added tax on sales and services (ICMS) - normal operations (a) 293,193 255,945 ICMS - credits from PP&E 163,847 166,824 Social integration program (PIS) and social contribution on revenue 199 45,604 PIS and COFINS - credits from PP&E 353,928 316,973 REINTEGRA program (b) 16,799 19,848 Federal tax credits (c) 1,109,122 2,459,293 Other 40,234 5,434 Foreign subsidiaries Value-added tax ("IVA") 277,175 217,630 Other 9,470 7,701 Total 2,265,402 3,495,729 Current assets 1,192,665 1,238,011 Non-current assets 1,072,737 2,257,718 Total 2,265,402 3,495,729

11 Investments (Tables)

11 Investments (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of associates [abstract]
Schedule of investments	(a) Information on equity method investee Interest in total and Net profit (loss) voting capital (%) for the year Equity Direct and indirect 2020 2019 2018 2020 2019 Jointly-controlled investment RPR (i) 33.20 (63,525) 29,687 6,358 32,217 93,025 Odebrecht Comercializadora de Energia S.A. ("OCE") (ii) (48) Associate Borealis (iii) 20.00 6,019 17,622 (2,900) 161,363 164,086 (i) RPR – its main activities are the refine, processing and sale and import of oil, its byproducts and correlated products. (ii) Entity closed in June 2018. (iii) Borealis – its main activities are the production and commercialization of petrochemical byproducts and correlated products.
Schedule of changes in investments	(b) Changes in equity method investees Domestic associate Borealis RPR Other Total Balance at 2018 32,776 33,094 84 65,954 Dividends and interest on equity (3,002) (4,295) (7,297) Equity in results of investees 3,042 9,857 12,899 Other comprehensive income (7,769) (7,769) Other 56 56 Balance at 2019 32,816 30,887 140 63,843 Dividends and interest on equity (1,748) (164) (1,912) Equity in results of investees 1,204 (21,093) (19,889) Other comprehensive income 1,067 1,067 Other 44 44 Balance at 2020 32,272 10,697 184 43,153
Schedule of impact on the consolidation of Braskem Idesa	If the investigation identifies evidence to support any of the allegations, such findings could affect the Company's business, financial condition, internal controls over financial reporting, and operating results, as well as the liquidity. Balance sheet Consolidated Braskem without the effect of Braskem Idesa consolidated(i) Eliminations Consolidated 2020 2019 2020 2019 2020 2019 2020 2019 Assets Curent Cash and cash equivalents 12,958,419 5,786,645 904,433 1,017,235 13,862,852 6,803,880 Financial investments 3,627,227 1,687,504 3,627,227 1,687,504 Trade accounts receivable 4,386,825 1,973,414 577,530 331,838 (232,376) (19,502) 4,731,979 2,285,750 Inventories 7,876,485 7,028,641 507,165 596,443 8,383,650 7,625,084 Taxes recoverable 1,144,355 1,084,055 48,310 153,956 1,192,665 1,238,011 Income tax and social contribution 1,547,916 439,933 1,547,916 439,933 Derivatives 33,769 4,712 33,769 4,712 Judicial deposits 2,571,683 2,571,683 Other receivables 688,944 393,593 121,242 339,404 810,186 732,997 32,263,940 20,970,180 2,158,680 2,438,876 (232,376) (19,502) 34,190,244 23,389,554 Non-current Financial investments 15,564 9,708 15,564 9,708 Taxes recoverable 847,399 2,257,652 225,338 66 1,072,737 2,257,718 Income tax and social contribution 72,267 239,847 72,267 239,847 Deferred tax 6,658,276 1,713,837 1,871,696 948,759 8,529,972 2,662,596 Related parties 9,122,666 6,729,486 (ii) (9,122,666) (6,729,486) Derivatives 34,091 17,877 34,091 17,877 Judicial deposits 196,911 1,508,880 196,911 1,508,880 Other receivables 251,398 295,586 17,347 505 268,745 296,091 Investments 43,153 63,843 43,153 63,843 Property, plant and equipment 22,295,803 20,488,870 14,436,012 12,537,615 (iii) (802,666) (711,304) 35,929,149 32,315,181 Intangible 2,568,869 2,568,347 259,822 193,741 2,828,691 2,762,088 Right of use of assets 2,509,484 2,309,506 392,911 296,148 2,902,395 2,605,654 44,615,881 38,203,439 17,203,126 13,976,834 (9,925,332) (7,440,790) 51,893,675 44,739,483 Total assets 76,879,821 59,173,619 19,361,806 16,415,710 (10,157,708) (7,460,292) 86,083,919 68,129,037 Liabilities and shareholders' equity Current Trade payables 9,753,762 8,903,168 424,929 233,323 (232,376) (19,502) 9,946,315 9,116,989 Borrowings 1,318,931 774,924 1,318,931 774,924 Debentures 54,436 46,666 54,436 46,666 Braskem Idesa Borrowings 7,660,128 744,408 7,660,128 744,408 Payroll and related charges 776,134 598,147 38,432 25,576 814,566 623,723 Taxes payable 927,039 306,453 25,650 16,433 952,689 322,886 Income tax and social contribution 284,129 34,856 284,129 34,856 Lease 821,695 619,217 73,414 57,074 895,109 676,291 Provision - geological event in Alagoas 4,349,931 1,450,476 4,349,931 1,450,476 Other financial liabilities 516,933 516,933 Other payables 1,947,569 1,798,865 163,371 109,143 2,110,940 1,908,008 20,233,626 15,049,705 8,385,924 1,185,957 (232,376) (19,502) 28,387,174 16,216,160 Non-current Loan agreements 40,413,192 28,242,052 40,413,192 28,242,052 Braskem Idesa Borrowings 4,399,110 9,237,318 4,399,110 9,237,318 Debentures 181,679 227,901 181,679 227,901 Accounts payable to related parties 9,140,064 6,714,236 (ii) (9,140,064) (6,714,236) Loan to non-controlling shareholders (v) 3,222,493 2,395,887 3,222,493 2,395,887 Income tax and social contribution 576,174 576,174 Deferred income tax and social contribution 1,234,398 273,036 1,234,398 273,036 Provision for losses on subsidiaries 5,283,264 3,082,173 (iv) (5,283,264) (3,082,173) Lease 1,962,235 1,767,314 350,542 233,291 2,312,777 2,000,605 Provision - geological event in Alagoas 4,825,846 1,932,591 4,825,846 1,932,591 Other payables 4,274,837 3,625,695 122,757 33,086 4,397,594 3,658,781 58,751,625 39,150,762 17,234,966 18,613,818 (14,423,328) (9,796,409) 61,563,263 47,968,171 Shareholders' equity Attributable to theCompany's shareholders (2,202,306) 4,886,089 (6,259,084) (3,384,065) 6,259,084 3,383,274 (2,202,306) 4,885,298 Non-controlling interest in subsidiaries 96,876 87,063 (1,761,088) (1,027,655) (1,664,212) (940,592) (2,105,430) 4,973,152 (6,259,084) (3,384,065) 4,497,996 2,355,619 (3,866,518) 3,944,706 Total liabilities and shareholders' equity 76,879,821 59,173,619 19,361,806 16,415,710 (10,157,708) (7,460,292) 86,083,919 68,129,037 (i) Consolidation of Braskem Idesa with its direct subsidiary Braskem Idesa Serviços. (ii) Loan from Braskem Holanda as part of shareholders’ contribution to the Braskem Idesa project. (iii) Adjustment corresponding to the capitalization of a portion of financial charges of the abovementioned loan. (iv) Provision recorded in the subsidiary Braskem Holanda for the negative shareholders' equity of Braskem Idesa. (v) Loan payable, maturing December 2029 and 7% p.a., to the non-controlling shareholders of Braskem Idesa. These proceeds were used by Braskem Idesa to fund its construction project. Statement of profit or loss Consolidated Braskem without the effect of Braskem Idesa consolidated Eliminations Consolidated 2020 2019 2018 2020 2019 2018 2020 2019 2018 2020 2019 2018 Net revenue 55,779,528 49,961,286 54,851,243 4,046,581 3,050,420 3,766,371 (1,282,615) (688,181) (617,748) 58,543,494 52,323,525 57,999,866 Cost of products sold (45,563,723) (44,111,980) (44,928,721) (3,112,129) (2,509,060) (2,314,998) 1,344,438 741,922 667,062 (47,331,414) (45,879,118) (46,576,657) 10,215,805 5,849,306 9,922,522 934,452 541,360 1,451,373 61,823 53,741 49,314 11,212,080 6,444,407 11,423,209 Income (expenses) Selling and distribution (1,609,844) (1,582,794) (1,495,507) (242,211) (200,661) (193,672) (1,852,055) (1,783,455) (1,689,179) (Loss) reversals for impairment of (55,074) (4,772) 87,008 (178) (2,297) (55,252) (7,069) 87,008 General and administrative (1,739,541) (2,082,002) (1,669,277) (179,350) (141,269) (123,576) 144 (909) (332) (1,918,747) (2,224,180) (1,793,185) Research and development (250,648) (247,730) (219,256) (250,648) (247,730) (219,256) Results from equity investments (1,026,922) (326,427) 76,821 1,007,524 336,645 (77,709) (19,398) 10,218 (888) Other income 748,923 2,102,684 656,725 1,826 305,750 370,497 750,749 2,408,434 1,027,222 Other expenses (7,573,874) (4,466,450) (502,795) (364,747) 19,508 (51,918) (7,938,621) (4,446,942) (554,713) (1,291,175) (758,185) 6,856,241 149,792 522,391 1,452,704 1,069,491 389,477 (28,727) (71,892) 153,683 8,280,218 Financial results Financial expenses (3,851,233) (3,009,471) (2,227,544) (1,505,628) (1,205,412) (1,090,019) 443,496 332,098 310,012 (4,913,365) (3,882,785) (3,007,551) Financial income 1,032,530 1,135,118 867,185 11,150 47,534 31,879 (443,496) (332,098) (310,012) 600,184 850,554 589,052 Exchange rate variations, net (4,823,269) (1,768,850) (2,014,205) (482,125) 75,610 (232,064) 6,683 (31,280) (10,714) (5,298,711) (1,724,520) (2,256,983) (7,641,972) (3,643,203) (3,374,564) (1,976,603) (1,082,268) (1,290,204) 6,683 (31,280) (10,714) (9,611,892) (4,756,751) (4,675,482) (Loss) profit before income tax and social contribution (8,933,147) (4,401,388) 3,481,677 (1,826,811) (559,877) 162,500 1,076,174 358,197 (39,441) (9,683,784) (4,603,068) 3,604,736 IR and CSL - current and deferred 2,253,684 1,873,207 (639,394) 414,794 89,463 (97,157) 2,668,478 1,962,670 (736,551) 2,253,684 1,873,207 (639,394) 414,794 89,463 (97,157) 2,668,478 1,962,670 (736,551) (Loss) profit for the year (6,679,463) (2,528,181) 2,842,283 (1,412,017) (470,414) 65,343 1,076,174 358,197 (39,441) (7,015,306) (2,640,398) 2,868,185 Statement of cash flows Consolidated Braskem without the effect of Braskem Idesa consolidated Eliminations Consolidated 2020 2019 2018 2020 2019 2018 2020 2019 2018 2020 2019 2018 (Loss) profit before income tax and social contribution (8,933,147) (4,401,388) 3,481,677 (1,826,811) (559,877) 162,500 1,076,174 358,197 (39,441) (9,683,784) (4,603,068) 3,604,736 Adjustments for reconciliation of profit (loss) Depreciation and amortization 2,995,609 2,732,181 2,228,978 1,114,439 952,916 810,581 (61,967) (52,832) (48,982) 4,048,081 3,632,265 2,990,577 Results from equity investments 1,026,922 326,427 (76,821) (1,007,524) (336,645) 77,709 19,398 (10,218) 888 Interest andmonetary and exchange variations, net 8,541,980 3,050,987 4,658,342 1,921,975 1,062,843 1,344,888 (6,683) 31,280 10,714 10,457,272 4,145,110 6,013,944 Reversal of provisions 336,838 320,439 23,725 336,838 320,439 23,725 Provision - geological event in Alagoas 6,901,828 3,383,067 6,901,828 3,383,067 PIS and COFINS credits - exclusion of ICMS from the calculation basis (310,557) (1,904,206) (519,830) (310,557) (1,904,206) (519,830) Loss (reversals) for impairment of trade accounts receivable 55,252 7,069 (87,008) 55,252 7,069 (87,008) Provision for losses and write-offs of long-lived assets 8,794 224,825 69,270 379 3,200 8,794 225,204 72,470 10,623,519 3,739,401 9,778,333 1,209,603 1,456,261 2,321,169 11,833,122 5,195,662 12,099,502 Changes in operating working capital Other financial assets 3,746,107 (3,680,460) 3,746,107 (3,680,460) Financial investments (1,860,827) 797,445 98,349 (1,860,827) 797,445 98,349 Trade accounts receivable (2,247,729) 677,176 251,683 (152,971) 325,820 (7,348) 212,874 (107,950) (20,917) (2,187,826) 895,046 223,418 Inventories (309,492) 825,236 (1,337,618) 56,958 42,581 (199,672) (252,534) 867,817 (1,537,290) Taxes recoverable 1,584,911 1,216,225 1,068,637 (52,357) (20,798) (46,395) 1,532,554 1,195,427 1,022,242 Prepaid expenses (172,027) 85,549 (67,051) 465,812 117,183 (38,112) 293,785 202,732 (105,163) Other receivables 44,513 (242,727) (12,596) 352,590 (30,938) (236,392) 397,103 (273,665) (248,988) Trade payables (2,926,585) 330,633 1,113,381 137,895 (156,138) 209,077 (212,874) 107,950 20,917 (3,001,564) 282,445 1,343,375 Taxes payable 965,191 (485,309) (828,222) (515,430) (84,484) (149,026) 449,761 (569,793) (977,248) Advances from customers 224,764 176,189 (218,623) (25,776) 21,776 18,665 198,988 197,965 (199,958) Leniency agreement (349,842) (341,605) (330,006) (349,842) (341,605) (330,006) Sundry provisions (158,915) (226,519) (116,458) 13,560 10,971 (145,355) (215,548) (116,458) Other payables (1,399,928) 348,916 415,468 33,810 13,287 417,759 (1,366,118) 362,203 833,227 Cash generated from operations 7,763,660 3,220,150 9,815,277 1,523,694 1,695,521 2,289,725 9,287,354 4,915,671 12,105,002 Interest paid (1,946,931) (1,576,526) (1,328,420) (789,890) (661,919) (588,381) (2,736,821) (2,238,445) (1,916,801) Income tax and social contribution paid (252,479) (403,614) (937,557) (5,063) (8,337) (274) (257,542) (411,951) (937,831) Net cash generated by operating activities 5,564,250 1,240,010 7,549,300 728,741 1,025,265 1,701,070 6,292,991 2,265,275 9,250,370 Proceeds from the sale of fixed assets and intangible assets 33,140 12,590 95,133 33,140 12,590 95,133 Proceeds from the sale of investments 81,000 81,000 Funds received in the investments' capital reduction 2,254 2,254 Dividends received 4,822 3,513 41,791 4,822 3,513 41,791 Acquisitions to property, plant and equipment and intangible assets (2,653,009) (2,578,558) (2,635,906) (106,780) (103,964) (70,422) (2,759,789) (2,682,522) (2,706,328) Other investments (2,167) (2,167) Net cash used in investing activities (2,615,047) (2,562,455) (2,417,895) (106,780) (103,964) (70,422) (2,721,827) (2,666,419) (2,488,317) Short-term and long-term debt Acquired 13,049,459 20,586,103 4,301,626 13,049,459 20,586,103 4,301,626 Payments (8,734,505) (17,425,409) (6,592,197) (8,734,505) (17,425,409) (6,592,197) Braskem Idesa borrowings Acquired 3,497,622 3,497,622 Payments (905,210) (4,398,453) (812,929) (905,210) (4,398,453) (812,929) Related parties Acquired loans (payment of loans ) 72,880 (37,618) (72,880) (37,618) Lease (610,392) (407,320) (51,676) (46,870) (662,068) (454,190) Dividends paid (2,380) (668,904) (1,499,900) (2,380) (668,904) (1,499,900) Other financial liabilities (534,456) 499,999 (534,456) 499,999 Cash generated (used) in financing activities 3,167,726 2,584,469 (3,717,591) (994,504) (947,701) (885,809) 2,173,222 1,636,768 (4,603,400) Exchange variation on cash of foreign subsidiaries 1,054,845 (59,659) (309,941) 259,741 80,278 (76,168) 1,314,586 20,619 (386,109) Increase in cash and cash equivalents 7,171,774 1,202,365 1,103,873 (112,802) 53,878 668,871 7,058,972 1,256,243 1,772,544 Represented by Cash and cash equivalents at the beginning for the year 5,786,645 4,584,280 3,480,407 1,017,235 963,357 294,686 6,803,880 5,547,637 3,775,093 Cash and cash equivalents at the end for the year 12,958,419 5,786,645 4,584,280 904,433 1,017,235 963,357 13,862,852 6,803,880 5,547,637 Increase in cash and cash equivalents 7,171,774 1,202,365 1,103,873 (112,802) 53,878 668,671 7,058,972 1,256,243 1,772,544

12 Property, plant and equipm_2

12 Property, plant and equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, plant and equipment [abstract]
Schedule of changes in property, plant and equipment	(a) Reconciliation of carrying amount Land Buildings and Improvements Machinery, Equipment and Facilities Projects and Stoppage in Progress (i) Other Total Cost 602,299 6,676,549 43,024,738 5,102,393 1,784,807 57,190,786 Accumulated depreciation and amortization - (2,026,559) (22,238,530) - (1,165,807) (25,430,896) Balance as of December 31, 2018 602,299 4,649,990 20,786,208 5,102,393 619,000 31,759,890 Acquisitions 0 - 1,280 61,213 2,658,070 3,701 2,724,264 Capitalized financial charges 0 - - - 198,201 - 198,201 Foreign currency translation adjustment 0 11,508 289,118 675,400 105,701 3,536 1,085,263 Cost 11,508 366,939 860,672 105,701 10,109 1,354,929 Depreciation - (77,821) (185,272) - (6,573) (269,666) Transfers by concluded projects - 21,382 884,606 (993,024) 87,036 - Transfers to inventory - - - (47,696) (2,866) (50,562) Transfers to intangible - - - (6,433) - (6,433) Disposals - (634) (223,514) (7,739) (3,659) (235,546) Cost - (1,178) (392,033) (7,739) (31,264) (432,214) Depreciation - 544 168,519 - 27,605 196,668 Depreciation and amortization 0 - (388,869) (2,534,637) - (138,395) (3,061,901) Transfers to right of use of assets - - - - (97,995) (97,995) Cost 0 - - - - (125,497) (125,497) Depreciation 0 - - - - 27,502 27,502 Net book value 0 613,807 4,939,108 21,461,608 5,208,094 622,536 32,845,153 Cost 0 613,807 7,064,972 44,439,196 7,009,473 1,726,026 60,853,474 Accumulated depreciation 0 - (2,492,705) (24,789,920) - (1,255,668) (28,538,293) Balance as of December 31, 2019 0 613,807 4,572,267 19,649,276 7,009,473 470,358 32,315,181 Acquisitions - 590 60,130 2,609,565 4,030 2,674,315 Capitalized financial charges - - - 252,427 - 252,427 Foreign currency translation adjustment 69,244 818,725 1,984,408 1,136,671 27,937 4,036,985 Cost 69,244 1,132,817 2,982,072 1,136,671 74,856 5,395,660 Depreciation - (314,092) (997,664) - (46,919) (1,358,675) Transfers by concluded projects - 105,702 6,248,845 (6,542,755) 188,208 - Transfers to inventory - - - (53,903) 76,709 22,806 Transfers to intangible - - - (22,373) (18,619) (40,992) Cost - - - (22,373) (18,587) (40,960) Depreciation - - - - (32) (32) Disposals (20) (2,358) (22,652) - (1,945) (26,975) Cost (20) (22,657) (328,411) - (12,576) (363,664) Depreciation - 20,299 305,759 - 10,631 336,689 Depreciation - (372,687) (2,787,042) - (144,869) (3,304,598) Net book value 683,031 5,122,239 25,132,965 4,389,105 601,809 35,929,149 Cost 683,031 8,281,424 53,401,832 4,389,105 2,038,666 68,794,058 Accumulated depreciation - (3,159,185) (28,268,867) - (1,436,857) (32,864,909) Balance as of December 31, 2020 683,031 5,122,239 25,132,965 4,389,105 601,809 35,929,149 (i) On December 31, 2020, the amounts recorded under this item corresponded to overhaul costs with scheduled shutdowns in Brazil and at overseas plants that are either in the preparation phase or ongoing in the amount of R$924,747 (R$1,400,667 in 2019), capitalized financial charges in the amount of R$233,963 (R$419,244 in 2019), inventories of spare parts in the amount of R$405,497 (R$430,418 in 2019), strategic projects ongoing in Brazil in the amount of R$256,873 (R$98,879 in 2019) and in Braskem America in the amount of R$313,080 (R$2,611,034 in 2019). The remainder corresponds mainly to various projects for maintaining the production capacity of plants.
Schedule of property, plant and equipment by country	(b) Property, plant and equipment by country 2020 2019 Brazil 15,105,253 15,682,081 Mexico 13,632,787 11,826,309 United States of America 6,823,655 4,545,974 Germany 363,975 258,291 Other 3,479 2,526 35,929,149 32,315,181

13 Intangible assets (Tables)

13 Intangible assets (Tables)	12 Months Ended
	Dec. 31, 2020
Intangible assets and goodwill [abstract]
Schedule of changes in intangible assets	Goodwill Brands Software Customers Total Cost 3,187,678 437,384 799,960 392,180 4,817,202 Accumulated amortization (1,128,804) (191,087) (565,828) (190,501) (2,076,220) Balance as of December 31, 2018 2,058,874 246,297 234,132 201,679 2,740,982 Acquisitions 112 61,414 61,526 Foreign currency translation adjustment 12,957 2,704 15,661 Cost 13,919 6,356 20,275 Amortization (962) (3,652) (4,614) Transfers from projects and stoppage in progress 6,433 6,433 Amortization (7,751) (32,747) (22,016) (62,514) Net book value 2,058,874 251,615 271,936 179,663 2,762,088 Cost 3,187,678 451,415 874,159 392,180 4,905,432 Accumulated amortization (1,128,804) (199,800) (602,223) (212,517) (2,143,344) Balance as of December 31, 2019 2,058,874 251,615 271,936 179,663 2,762,088 Acquisitions 1,789 38,660 66 40,515 Foreign currency translation adjustment 38,409 21,531 59,940 Cost 46,311 56,422 102,733 Amortization (7,902) (34,891) (42,793) Transfers from property, plant and equipment 40,992 40,992 Amortization (6,753) (46,075) (22,016) (74,844) Net book value 2,058,874 285,060 327,044 157,713 2,828,691 Cost 3,187,678 499,515 1,010,201 392,246 5,089,640 Accumulated amortization (1,128,804) (214,455) (683,157) (234,533) (2,260,949) Balance as of December 31, 2020 2,058,874 285,060 327,044 157,713 2,828,691 Average annual rates of amortization 2.96% 14.50% 6.01%
Schedule of goodwill impairment testing	In December 2020, Braskem performed an impairment test using the value in use method (discounted cash flow), as shown below: Allocated Recoverable Book goodwill amount value (i) CF/Book value Northeastern petrochemical complex 475,780 14,846,391 3,540,498 4.2 Southern petrochemical complex 1,390,741 32,417,808 4,583,414 7.1 Vinyls unit 192,353 2,168,594 2,073,351 1.0 (i) The book value includes, in addition to goodwill, tangible and intangible assets with defined useful lives and the working capital. Given the potential impact on cash flows of the “discount rate” and “perpetuity”, Braskem conducted a sensitivity analysis based on changes in these variables, with cash flows shown in the table below: +0.5% on -0.5% on discount rate perpetuity Northeastern petrochemical complex 13,745,276 14,209,808 Southern petrochemical complex 30,218,367 31,168,593 Vinyls unit 1,930,200   2,029,886
Schedule of discount rate	Given the potential impact on cash flows of the “discount rate” and “perpetuity”, Braskem conducted a sensitivity analysis based on changes in these variables, with cash flows shown in the table below: +0.5% on -0.5% on discount rate perpetuity Northeastern petrochemical complex 13,745,276 14,209,808 Southern petrochemical complex 30,218,367 31,168,593 Vinyls unit 1,930,200   2,029,886
Schedule of intangible assets by country	(c) Intangible assets by country 2020 2019 Brazil 2,517,470 2,521,941 Mexico 259,822 193,741 United States of America 25,156 24,313 Germany 26,211 22,077 Other 32 16 2,828,691 2,762,088

14 Right-of-use assets and Le_2

14 Right-of-use assets and Lease Liability (Table)	12 Months Ended
	Dec. 31, 2020
Right-of-use Assets And Lease Liability
Schedule of changes in right-of-use assets	Changes in right-of-use assets: Balance as of Foreign currency Balance as of 12/31/2019 Acquisitions Depreciation Disposal translation adjustment 12/31/2020 Buildings and constructions 212,170 65,176 (54,712) 37,262 259,896 Computer equipment and goods 12,523 9,341 (5,499) 334 16,699 Machinery and equipment 743,248 227,690 (198,441) (25,801) 3,032 749,728 Ships 865,387 258,193 (286,905) (12,687) 10,860 834,848 Rail cars 746,040 244,199 (180,146) 197,243 1,007,336 Vehicles 26,286 21,502 (14,473) 573 33,888 Total 2,605,654 826,101 (740,176) (38,488) 249,304 2,902,395 Transfers from Balance as of property, plant Initial addition Foreign currency Balance as of 12/31/2018 and equipment on 01/01/2019 Acquisitions Depreciation Disposal translation adjustment 12/31/2019 Buildings and constructions 207,524 153,771 (27,759) (122,488) 1,122 212,170 Computer equipment and goods 2,726 4,932 6,179 (1,446) 132 12,523 Machinery and equipment 7,956 526,318 344,928 (136,615) 661 743,248 Ships 906,495 150,670 (191,778) 865,387 Rail cars 87,313 633,492 103,169 (132,728) 54,794 746,040 Vehicles 35,479 1,073 (10,493) 227 26,286 Total 97,995 2,314,240 759,790 (500,819) (122,488) 56,936 2,605,654
Schedule of changes in lease liability	Reconciliation of lease liability carrying amount: 2019 Balance at December 31, 2018 100,557 Initial adoption IFRS 16 2,191,908 Balance at January 01, 2019 2,292,465 Acquired 911,619 Disposals (122,488) Interests and monetary and exchange variations, net 121,061 Currancy translation adjustments 56,805 Payments (454,190) Interest paid (128,376) Balance at December 31, 2019 2,676,896 2020 Balance at December 31, 2019 2,676,896 Acquired 826,101 Disposals (38,488) Interests and monetary and exchange variations, net 327,135 Currancy translation adjustments 267,493 Payments (662,068) Interest paid (189,183) Balance at December 31, 2020 3,207,886
Schedule of payment schedule by maturity	The minimum annual commitments are shown below: 2020 2021 870,587 2022 641,313 2023 494,331 2024 403,793 2025+ 1,070,768 Total 3,480,792

15 Trade account payables (Tabl

15 Trade account payables (Tables)	12 Months Ended
	Dec. 31, 2020
Trade and other payables [abstract]
Schedule or trade account payables	See accounting policies in note 20. Information about the Company’s exposure to currency and liquidity is included in Note 4. Note 2020 2019 Trade payables: Domestic market - Third parties 1,077,679 1,006,391 Third parties (drawee risk) (i) 239,512 74,685 Related parties 9 97,900 155,980 Related parties (drawee risk) (i) 546,044 - - Foreign market (ii) - - Third parties 8,023,032 7,964,536 - - Present value adjustment - foreign market (iii) (30,619) (80,766) 9,953,548 9,120,826 Current liabilities 9,946,315 9,116,989 Non-current liabilities 7,233 3,837 Total 9,953,548 9,120,826 (i) The Company participates in a finance programme under which its suppliers may elect to receive early payment of their invoices from a bank by factoring their receivable from the Company. Under the arrangement there is no change in the instruments issued by the supplier and amount and payment terms are maintained. (ii) Considers R$4.7 billion (R$6.5 billion in 2019) in raw material purchases due in up to 360 days for which the Company provides letters of credit issued by financial institutions that indicate the suppliers as beneficiaries. (iii) The rate for calculating the Present Value Adjustment (PVA) applied to the external market payments with terms equal to or longer than 90 days is calculated based on the average rate for lengthening the term of trade payables.

16 Borrowings (Tables)

16 Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Borrowings [abstract]
Schedule of borrowings	(a) Borrowings Annual financial charges 2020 2019 Foreign currency Bonds Note 16 (b) 34,963,651 24,583,325 Export prepayment Note 16 (c) 2,207,762 863,293 Investments Note 16 (d) 996,531 751,376 Other Note 16 (e) 2,755,200 1,952,667 Transactions costs (688,814) (499,194) 40,234,330 27,651,467 Current liabilities 1,206,084 676,831 Non-current liabilities 39,028,246 26,974,636 Total 40,234,330 27,651,467 Local currency Export credit notes 100.00 of CDI + 0.70 402,739 405,642 Commercial notes 100.00 of CDI + 0.85 545,171 554,307 BNDES 4.00 1,538 19,998 BNDES IPCA + 6.04 490,963 270,520 FINEP/FINISA 3.59 26,154 78,776 FINAME TLP + 6.00 324 BNB-FNE (Fundo Constitucional de Financiamentos do Nordeste) IPCA + interest between 2.39 and 2.78 5,639 5,582 Fundo de Desenvolvimento do Nordeste (FDNE) 6.50 27,196 32,152 Other 19.14 237 Transactions costs (1,607) (2,029) 1,497,793 1,365,509 Current liabilities 112,847 98,093 Non-current liabilities 1,384,946 1,267,416 Total 1,497,793 1,365,509 Foreign currency and local currency Current liabilities 1,318,931 774,924 Non-current liabilities 40,413,192 28,242,052 Total 41,732,123 29,016,976
Schedule of bonds	(b) Bonds Issue date Issue amount Outstanding amount Maturity Interest 2020 2019 Oct-2010 450,000 250,000 no maturity date 7.38 1,299,175 1,025,428 Jul-2011 500,000 500,000 Jul-2041 7.13 2,679,603 2,078,372 Feb-2012 250,000 250,000 no maturity date 7.38 1,299,175 1,025,428 May-2012 500,000 286,267 May-2022 5.38 1,500,304 1,175,799 Jul-2012 250,000 250,000 Jul-2041 7.13 1,339,801 1,039,186 Feb-2014 500,000 500,000 Feb-2024 6.45 2,667,250 2,068,790 May-2014 250,000 250,000 Feb-2024 6.45 1,333,625 1,034,395 Oct-2017 500,000 195,760 Jan-2023 3.50 1,034,179 847,715 Oct-2017 1,250,000 1,250,000 Jan-2028 4.50 6,633,913 5,145,440 Nov-2019 1,500,000 1,500,000 Jan-2030 4.50 7,941,207 6,090,640 Nov-2019 750,000 750,000 Jan-2050 5.88 3,992,933 3,052,132 Jul-2020 (i) 600,000 600,000 Jan-2081 8.50 3,242,486 - - Total 7,300,000 6,582,027 34,963,651 24,583,325 (i) This Bond is recorded as a financial liability. According to the specific methodology adopted by some rating agencies, only for the purposes of calculating leverage, the referred bond is classified as a hybrid capital instrument.
Schedule of export pre-payment	(c) Export pre-payment Initial amount Outstanding of the transaction amount Issue date (US$ thousand) US$ Maturity Charges (% per year) 2020 2019 Sep-2017 135,000 97,500 Mar-2027 US dollar exchange variation + semiannual Libor + 1.61 509,141 457,712 Oct-2019 100,000 100,000 Oct-2024 US dollar exchange variation + quarterly Libor + 1.75 521,469 405,581 Aug-2020 225,000 225,000 Feb-2031 US dollar exchange variation + semiannual Libor + 1.70 1,177,152 Total 460,000 422,500 2,207,762 863,293
Schedule of capital raised for investments	The funds will be released in accordance with the progress of the project’s construction and the remaining funding is expected to occur in the first half of 2021. Initial amount Outstanding of the transaction amount Issue date (US$) US$ Maturity Charges (% per year) 2020 2019 July-2018 (i) 203,742 191,757 Dec-2028 Us dollar exchange variation + semianual Libor + 0.65 996,531 751,376 Total 203,742 191,757 996,531 751,376 (i) US$130,650 released in July 2018, US$13,677 in September 2018, US$13,823 in December 2018, US$7,688 in March 2019, US$6,231 in June 2019, US$4,549 in September 2019, US$2,780 in December 2019, US$4,158 in March 2020, US$5,738 in June 2020, US$5,068 in September 2020, US$2,380 in December 2020 and capitalized interest in the amount of US$7,000.
Schedule of others - SACE	(e) Others Identification Issue date Initial amount Outstanding Maturity Charges (% per year) 2020 2019 SACE (i) Nov-2018 295,125 236,100 Nov-2028 Us dollar exchange variation + semianual Libor + 0.90 1,228,285 1,073,526 SACE (i) Dec-2019 150,000 135,000 Dec-2029 Us dollar exchange variation + semianual Libor + 0.90 702,027 605,448 MONFORTE (ii) Apr-2019 72,345 57,811 Apr-2026 Us dollar exchange variation + semianual Libor + 1.00 300,434 273,693 ING (iii) Jan-2020 100,000 100,000 Jan-2025 Us dollar exchange variation + semianual Libor + 1.65 524,454 Total 617,470 528,911 2,755,200 1,952,667 (i) Credit facility contracted by the subsidiary Braskem Netherlands B.V. with guarantee from SACE, an Italian export credit agency. (ii) Credit facility contracted by Braskem S.A. with a term of 7 years. To consummate this facility, certain assets of the Company’s plants were pledged to the financial institution in amount higher than financing. (iii) Credit facility contracted by the subsidiary Braskem Netherlands B.V. with a term of 5 years.
Schedule of long-term maturities	The maturity profile of the long-term amounts is as follows: 2020 2019 2021 380,324 2022 2,086,460 1,549,976 2023 1,824,477 1,416,730 2024 5,653,432 4,418,409 2025 1,121,748 369,725 2026 580,062 350,320 2027 514,819 297,382 2028 6,986,264 5,314,976 2029 217,418 71,326 2030 7,951,181 6,068,078 2031 and thereafter 13,477,331 8,004,806 Total 40,413,192 28,242,052
Schedule of guarantees	Braskem has given collaterals for part of its borrowings as follows: Total Total Loans Maturity debt 2020 guaranteed Guarantees BNDES Jan-2021 1,538 1,538 Mortgage of plants, land and property, pledge of machinery and equipment FINEP Jul-2024 22,736 22,736 Bank surety FINISA Dec-2023 3,418 3,418 Bank surety BNB-FNE Jun-2027 5,639 5,639 Bank surety and pledge of reserve liquidity fund. Total 33,331 33,331

17 Braskem Idesa financing (Tab

17 Braskem Idesa financing (Tables)	12 Months Ended
	Dec. 31, 2020
Braskem Idesa Financing
Schedule of braskem idesa financing	Outstanding Principal amount US$ amount Identification US$ Maturity Charges (% per year) 2020 2019 Project finance Project finance I 700,000 467,519 feb-2027 Us dollar exchange variation + quarterly Libor + 3.25 0 2,444,515 2,149,002 Project finance II 210,000 131,591 feb-2027 Us dollar exchange variation + 6.17 0 690,311 608,260 Project finance III 600,000 409,870 feb-2029 Us dollar exchange variation + 4.33 0 2,145,326 1,849,896 Project finance IV 660,000 462,463 feb-2029 Us dollar exchange variation + quarterly Libor + 3.88 0 2,419,920 2,078,545 Total under current liabilities 2,170,000 1,471,443 7,700,072 6,685,703 Bond 900,000 900,000 nov-2029 Us dollar exchange variation + 7.45 4,729,587 3,640,381 Transactions costs (370,421) (344,358) Total 12,059,238 9,981,726 Current liabilities 7,660,128 744,408 Non-current liabilities 4,399,110 9,237,318 Total 12,059,238 9,981,726
Schedule of amortization	The following amortization schedule presents the maturities considering the breach of contractual obligations and the original contractual terms: With breach of contratual obligations Original contractual maturities 2020 2019 2020 2019 2020 744,408 744,408 2021 7,660,128 800,752 1,121,482 800,752 2022 699,090 907,343 699,090 2023 892,568 1,157,584 892,568 2024 978,479 1,268,619 978,479 2025 883,333 1,145,377 883,333 2026 743,566 964,410 743,566 2027 329,718 428,750 329,718 2028 257,117 334,753 257,117 2029 4,399,110 3,652,695 4,730,920 3,652,695 Total 12,059,238 9,981,726 12,059,238 9,981,726

18 Debentures (Tables)

18 Debentures (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure Of Debentures Abstract
Schedule of debentures	Issue date Issuer Series Maturity Annual financial charges (%) 2020 2019 Mar-2013 DAC Single Mar-2025 IPCA + 6% 177,009 202,992 Sep-2013 Cetrel Single Sep-2025 126.5% of CDI 59,106 71,575 236,115 274,567 Current liabilities 54,436 46,666 Non-current liabilities 181,679 227,901 Total 236,115 274,567
Schedule of long-term debenture maturity	The maturity profile of the long-term debentures is as follows: 2020 2019 2021 52,078 2022 53,406 52,100 2023 53,417 52,125 2024 53,443 52,153 2025 21,413 19,445 Total 181,679 227,901

19 Reconciliation of borrowing

19 Reconciliation of borrowing activities in the statement of cash flow (Tables)	12 Months Ended
	Dec. 31, 2020
Reconciliation Of Financing Activities In Statement Of Cash Flow
Reconciliation of borrowing activities in the statement of cash flow	Current and non-current Borrowings, debentures and Braskem Idesa financing Borrowings Debentures Total borrowings Braskem Idesa Loan to Lease Dividends Other Balance at December 31, 2019 29,016,976 274,567 29,291,543 9,981,726 2,395,887 2,676,896 6,502 516,933 Acquired 13,049,459 13,049,459 Payments (8,699,033) (35,472) (8,734,505) (905,210) (37,618) (662,068) (2,380) (534,456) Cash used in financing activities 4,350,426 (35,472) 4,314,954 (905,210) (37,618) (662,068) (2,380) (534,456) Other changes Interest paid (1,754,199) (24,945) (1,779,144) (754,829) (13,665) (189,183) Interest and monetary and exchange variations, net 4,664,034 21,965 4,685,999 1,044,110 188,074 327,135 17,523 VAT on loan 68,149 Acquired 826,101 Disposal (38,488) Currency translation adjustments 5,454,886 5,454,886 2,693,441 621,666 267,493 Additional dividends of subsidiary 2,450 Prescribed dividends (1,110) Other (6) 8,364,721 (2,980) 8,361,741 2,982,722 864,224 1,193,058 1,334 17,523 Balance at December 31, 2020 41,732,123 236,115 41,968,238 12,059,238 3,222,493 3,207,886 5,456

20 Financial instruments (Table

20 Financial instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of detailed information about financial instruments [abstract]
Schedule of non-derivative financial instruments and other liabilities	20.2 Non-derivative financial instruments and other liabilities Fair value Book value Fair value Note Classification by category hierarchy 2020 2019 2020 2019 Cash and cash equivalents 5 Cash and banks Amortized cost 1,946,963 2,303,231 1,946,963 2,303,231 Financial investments in Brazil Fair value through profit or loss Level 2 8,271,312 1,963,185 8,271,312 1,963,185 Financial investments abroad Fair value through profit or loss Level 2 3,644,577 2,537,464 3,644,577 2,537,464 13,862,852 6,803,880 13,862,852 6,803,880 Financial investments 6 LFT´s and LF´s Fair value through profit or loss Level 2 2,163,042 1,588,426 2,163,042 1,588,426 Time deposit investments Amortized cost 53,941 38,759 53,941 38,759 Other Fair value through profit or loss Level 2 1,425,808 70,027 1,425,808 70,027 3,642,791 1,697,212 3,642,791 1,697,212 Trade accounts receivable 7 Amortized cost 4,677,092 2,246,248 4,677,092 2,246,248 Trade accounts receivable 7 Fair value through other comprehensive income Level 2 78,116 60,403 78,116 60,403 Trade payables 15 Amortized cost 9,953,548 9,120,826 9,953,548 9,120,826 Borrowings 16 Amortized cost Foreign currency - Bond Level 1 34,963,651 24,583,325 37,155,060 25,790,532 Foreign currency - other borrowings Level 2 5,959,493 3,567,336 6,371,070 3,218,410 Local currency Level 2 1,499,400 1,367,538 2,591,920 1,075,803 42,422,544 29,518,199 46,118,050 30,084,745 Braskem Idesa borrowings 17 Amortized cost Project Finance Level 2 7,700,072 6,685,703 11,486,114 6,116,434 Bond Level 1 4,729,587 3,640,381 4,411,259 3,892,878 12,429,659 10,326,084 15,897,373 10,009,312 Debentures 18 Amortized cost Level 2 236,115 274,567 248,778 293,282 Loan ton non-controlling Amortized cost 3,222,493 2,395,887 3,222,493 2,395,887 Leniency agreement 25 Amortized cost 1,474,350 1,742,268 1,474,350 1,742,268 Other financial liabilities (i) Amortized cost 516,933 516,933 (i) Amount received due to the assignment of an agreement to supply ethylene to the client, without recourse, settled in 2020.
Schedule of changes in derivative financial instruments	20.3.1 Changes Operation characteristics Accumulated Net Net OCI (equity) (Asset)/ (Asset)/ Fair value Principal Extrinsic Intrinsic Fair Liability Change in Financial Liability Identification Note hierarchy exposure Derivatives value value value 2019 fair value settlement 2020 Non-hedge accounting transactions Exchange swap Level 2 Argentine peso Dollar 296 540 (839) (3) NCE swap Level 2 Real Dollar 25,604 129,297 (9,757) 145,144 Swap ACC Level 2 Dollar Real 16,259 (16,259) Swap C3/PGP Level 2 Propane Propene 66,223 (2,322) 63,901 Swap Nafta/Gasolina Level 2 Gasoline Naphtha 7,046 7,046 25,900 219,365 (29,177) 216,088 Hedge accounting transactions Dollar call and put options (a.i) Level 2 Real Dollar (43,948) (100,853) (144,801) (2,298) 594,780 (447,681) 144,801 Dollar swap (a.ii) Level 2 Real Dollar+Fixed rates 38,620 12,091 (50,711) Interest rate swaps (a.iii) Level 2 Libor Fixed rates (266,889) 26,707 162,615 (33,547) 155,775 Dollar swap CDI (a.ii) Level 2 Real Dollar+Fixed rates (566,641) 107,246 459,394 566,640 (43,948) (100,853) (978,331) 170,275 1,228,880 (531,939) 867,216 Derivatives Current assets (4,712) (33,769) Non-current assets (17,877) (34,091) Current liabilities 49,251 592,251 Non-current liabilities 169,513 558,913 196,175 1,083,304
Schedule of dollar call and put option	The future elements of forward exchange contracts are excluded from the designation of hedge instrument and are separately recorded as hedging cost, which is recognized under shareholders' equity in the other comprehensive income. Operation characteristics Accumulated OCI (equity) Principal Extrinsic Intrinsic Fair Identification exposure Derivatives value value value Dollar call and put option Real Dollar (43,948) (100,853) (144,801)
Schedule of interest rate swap linked to Libor	Interest rate swap linked to Libor Identification Nominal value Hedge Maturity Fair value, net US$ (interest rate per year) 2020 2019 Swap Libor I to VI 616,519 1.9825% Aug-2025 155,775 26,707 Total 616,519 155,775 26,707 Derivatives Current liabilities 53,838 5,768 Non-Current liabilities 101,937 20,939 Total 155,775 26,707
Schedule of non-derivative financial liabilities designated to hedge accounting	On December 31, 2020, the exports that were designated not yet realized and not discontinued are shown below: Total nominal value US$ 2021 336,000 2023 200,000 2024 688,854 2025 400,000 2028 1,250,000 2030 800,000 2031 800,000 2032 800,000 5,274,854
Schedule of financial instruments designated for hedge	The following table shows the changes in financial instruments designated for this hedge in the year: US$ Hedge Realizated discontinued 2019 discontinued hedge Designations 2020 Designated balance 5,398,854 (1,086,000) 362,000 600,000 5,274,854 The following table shows the changes in financial instruments designated for this hedge in the year: US$ Discontinued Rebalanced New 2019 hedge hedge designations 2020 Designated balance 2,552,407 (267,577) 86,613 2,371,443
Schedule of financial liability maturity	On December 31, 2020, the maturities of financial liabilities designated, within the scope of the consolidated statement of financial position, were as follows: Total nominal value US$ 2021 336,000 2023 200,000 2024 688,854 2025 400,000 2028 1,250,000 2030 800,000 2031 800,000 2032 800,000 5,274,854
Schedule of future hedged sales	The following table provides the balance of discontinued hedge accounting in the year ended December 31, 2020 (US$1,617,372), which is recorded in Braskem S.A.’s shareholders’ equity under “Other comprehensive income” and will be transferred to financial income (expenses) in accordance with the schedule of future hedged sales: Conversion rate Total nominal at Inception Closing rate Gross nominal value US$ R$/US$ R$/US$ value Hedge descontinued - From third to fourth quarter 2021 380,000 2.0017 3.9786 751,222 Hedge descontinued - From first to fourth quarter 2022 719,000 2.0017 3.9786 1,421,391 Hedge descontinued - From first to third quarter 2023 518,372 2.0017 3.9786 1,024,770 1,617,372 3,197,383
Schedule of exchange variation	The following table provides the balances of exchange variation recognized in the Company’s net financial income (expenses) due to the realization of exports designated, for this hedge in the 12-month period ended December 31, 2020: Conversion rate Total nominal at Inception Closing rate Gross nominal value US$ R$/US$ R$/US$ value First quarter 181,000 2.0017 4.2119 400,047 Second quarter 181,000 2.0017 5.1987 578,657 Third quarter 181,000 2.0017 5.1987 578,657 Fourth quarter 181,000 2.0017 5.5194 636,698 724,000 2,194,059
Schedule of changes in foreign exchange variation and income tax and social contribution	The changes in foreign exchange variation and Income Tax and Social Contribution under “Other comprehensive income” of this hedge are as follows: Exchange Net variation IR and CSL effect At December 31, 2019 (8,408,164) 2,858,775 (5,549,389) Exchange variation recorded in the period on OCI / IR and CSL (6,881,183) 2,339,602 (4,541,581) Exchange variation transferred to profit or loss / IR and CSL 2,194,059 (745,980) 1,448,079 At December 31, 2020 (13,095,288) 4,452,397 (8,642,891)
Schedule of hedged exports	The quarterly schedule of hedged exports in the following quarters of 2021 follows: Total nominal value US$ First quarter 150,000 Second quarter 186,000 Third quarter 180,000 Fourth quarter 200,000 716,000
Schedule of designated and unrealized sales	As of December 31, 2020, designated and unrealized sales were as follows: Nominal value US$ 2021 208,946 2022 183,318 2023 230,992 2024 251,884 2025 227,775 2026 192,651 2027 89,516 2028 71,341 2029 15,020 2030 225,000 2031 225,000 2032 225,000 2033 225,000 2,371,443
Schedule of designated financial liabilities maturities	In 2020, the designated financial liabilities to hedge future sales were distributed as follows: Nominal value US$ 2021 208,946 2022 183,318 2023 230,992 2024 251,884 2025 227,775 2026 192,651 2027 89,516 2028 71,341 2029 15,020 2030 225,000 2031 225,000 2032 225,000 2033 225,000 2,371,443
Schedule of discontinued hedge accounting	The following table provides the total amount of hedge accounting discontinued up to December 31, 2020 (US$752,870), which was transferred from “Other comprehensive income” to “profit and loss” of Braskem Idesa: Conversion rate Total nominal at Inception Closing rate Total nominal Gross nominal value US$ MXN/US$ MXN/US$ value MXN value Hedge discontinued in May 16, 2016 10,493 13.4541 17.9915 47,611 10,160 Hedge discontinued in December 2, 2019 712,823 13.6664 19.6113 4,237,661 904,317 Hedge discontinued in December 10, 2019 28,740 13.4541 19.3247 168,721 36,005 Hedge discontinued in February 18,2020 814 13.4541 18.5712 4,165 889 752,870 4,458,158 951,371
Schedule of exchange variation - Braskem Idesa	The following table provides the balances of exchange variation recognized in Braskem Idesa’s financial income (expenses) due to the realization of sales designated and discontinued for this hedge in the 12-month period ended December 31, 2020: Conversion rate Total nominal at Inception Closing rate Total nominal Gross nominal value US$ MXN/US$ MXN/US$ value MXN value First quarter 61,369 13.6555 18.9637 325,759 75,162 Second quarter 65,612 13.6539 22.4746 578,744 139,205 Third quarter 69,855 13.6542 21.4351 543,535 133,798 Fourth quarter 69,855 13.6534 20.3032 464,522 123,563 266,691 1,912,560 471,728
Schedule of changes in foreign exchange variation and income tax and social contribution - Braskem Idesa	The changes in foreign exchange variation and Income Tax and Social Contribution under “Other comprehensive income” are as follows: Exchange Net variation IR effect At December 31, 2019 (2,560,436) 768,865 (1,791,571) Exchange variation recorded in the period on OCI / IR (445,427) 133,632 (311,795) Exchange variation transferred to profit or loss / IR 471,728 (141,518) 330,210 At December 31, 2020 (2,534,135) 760,979 (1,773,156)
Schedule of hedged exports - Braskem Idesa	Below is the quarterly schedule of hedged sales in U.S. dollars in 2021: Nominal value US$ First quarter 69,855 Second quarter 75,848 Third quarter 77,094 Fourth quarter 80,594 303,391
Schedule of trade accounts receivable by credit ratings	On December 31, 2020 and 2019, considering the stages 1, 2 and 3 of expected credit losses, the percentage of trade accounts receivable by risk ratings was as follows: (%) 2020 2019 1 Minimal Risk 67.52 74.23 2 Low Risk 20.08 14.89 3 Medium Risk 10.43 7.82 4 High Risk 1.10 1.06 5 Very High Risk (i) 0.86 1.99 (i) Most clients in this group are inactive and the respective accounts are in the process of collection actions in the courts. Clients in this group that are still active buy from Braskem and pay in advance.
Schedule of default indicators	Default indicators: Last 12 months Domestic Export market market December 31, 2020 0.05% 0.14% December 31, 2019 0.05% 0.17% December 31, 2018 0.08% 0.45%
Schedule of financial assets with and without risk assessment	In order to determine the credit ratings of counterparties of financial assets classified under cash and cash equivalents, and financial investments, the Company uses the risk rating of agencies Standard& Poor’s, Moody’s and Fitch Ratings, within the limits established in its financial policy approved by the Board of Directors. 2020 2019 Financial assets with risk assessment AAA 13,639,273 5,475,075 AA+ 412,612 109,933 AA 735,755 AA- 199,405 1,458,424 A+ 1,336,334 159,848 A 53,941 121,132 A- 91,487 1,171,746 BBB+ 982,225 BBB 49 17,451,081 8,496,158 Financial assets without risk assessment Other financial assets with no risk assessment (i) 54,562 4,934 54,562 4,934 Total 17,505,643 8,501,092 (i) Investments approved by the Management of the Company, in accordance with the financial policy.
Schedule of sensitivity analysis	The sensitivity values in the table below are the changes in the value of the financial instruments in each scenario. Gain (losses) Reasonably possible Possible Instrument / Sensitivity Probable (14%) (41%) Brazilian real/U.S. dollar exchange rate Bonds 433,084 (5,443,471) (16,330,414) Braskem Idesa borrowings 84,014 (1,055,976) (3,167,929) Export prepayments 11,245 (141,336) (424,009) Investments 10,873 (136,663) (409,988) SACE 21,061 (264,720) (794,160) Dollar call and put options (i) 43,060 (568,577) (2,117,282) Swap NCE 5,973 (75,052) (225,210) Dollar swap x CDI 20,419 (256,577) (769,919) MONFORTE 3,278 (41,201) (123,603) Nexi 12,844 (161,433) (484,299) Other 5,699 (71,635) (214,904) Financial investments abroad (52) 648 1,943 Gain (losses) Reasonably possible Possible Instrument / Sensitivity Probable (40%) (120%) Libor floating interest rate Export prepayments (2,232) (5,344) (16,031) Swap 4,386 10,536 31,419 Braskem Idesa borrowings (39,804) (95,278) (285,834) Nexi (18,355) (43,936) (131,809) SACE (20,954) (50,158) (150,473) MONFORTE (1,228) (2,940) (8,819) Investments (9,734) (23,301) (69,902) Other (1,178) (2,820) (8,460) Gain (losses) Reasonably possible Possible Instrument / Sensitivity Probable (15%) (45%) CDI interest rate Export credit notes (3,942) (11,905) Debentures (848) (2,574) Financial investments in local currency 36 108 Other non commercial paper (3,486) (10,493) Gain (losses) Reasonably possible Possible Instrument / Sensitivity Probable (54%) (161%) IPCA interest rate Debêntures (268) (21,395) (68,834) BNDES (2,493) (212,224) (780,565) BNB/ FINEP/ FUNDES/FINISA/FINAME/FNE (9) (715) (2,336) Gain (losses) Reasonably possible Possible Instrument / Sensitivity Probable (15%) (45%) Selic interest rate Leniency agreement (6,164) (18,516) (i) The Company is in the short position of a possible counterparty call.

21 Taxes payable (Tables)

21 Taxes payable (Tables)	12 Months Ended
	Dec. 31, 2020
Taxes Payable
Schedule of taxes payable	2020 2019 Brazil IPI 125,338 58,945 ICMS 403,422 184,728 PIS and COFINS 284,944 150,664 Other 43,560 37,857 Other countries Value-added tax 16,027 11,933 Other 80,768 8,112 Total 954,059 452,239 Current liabilities 952,689 322,886 Non-current liabilities 1,370 129,353 Total 954,059 452,239

22 Income tax (''IR'') and so_2

22 Income tax (''IR'') and social contribution (''CSL'') (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Ir And Social Contribution
Schedule of income tax and social contribution reconciliation	(b) Amounts recognized in profit and loss 2020 2019 2018 (Loss) before IR and CSL (9,683,784) (4,603,068) 3,604,736 IR and CSL at the rate of 34% 3,292,487 1,565,043 (1,225,610) Permanent adjustments to the IR and CSL calculation basis IR and CSL on equity in results of investees 6,595 3,469 (302) Thin capitalization (695,741) (221,337) Effect of the refund of Braskem America's tax benefit (i) (737,841) Difference of rate applicable to each country (ii) 252,323 293,647 468,129 Fine in leniency agreement - (25,390) Effect from the retrospective tax rate on bonus depreciation of Braskem America 334,460 Other permanent adjustments 216,195 347,238 21,232 Effect of IR and CSL on results of operations 2,668,478 1,962,670 (736,551) Breakdown of IR and CSL: Current IR and CSL expense Current year (52,830) (251,641) (512,951) Changes in estimates related to prior years - 22,696 3,177 (52,830) (228,945) (509,774) Deferred IR and CSL expense Origination and reversal of temporary differences 2,677,328 2,062,501 (369,546) Tax losses (IR) and negative base (CSL) - 129,114 142,769 Recognition of previously unrecognised deductible temporary differences 43,980 2,721,308 2,191,615 (226,777) Total 2,668,478 1,962,670 (736,551) Effective rate 27.6% 42.6% 20.4% (i) Considering Universal Basis Taxation (“TBU”), the tax refund provided by U.S. Government affects the tax calculation of Braskem S.A. arising from the offsetting of Income Tax and Social Contribution Tax (IRPJ/CSLL) in the years of use of the bonus depreciation benefit. The amount calculated was R$738 million, which was recorded under current and non-current liabilities, in the item income tax and social contribution tax. (ii) Includes the impact from the difference between IR/CSL tax rate in Brazil (34%) used for the preparation of this note and the tax rates in countries where the subsidiaries abroad are located, as follows:
Schedule of foreign income tax rates	Official rate - % Headquarters (Country) 2020 2019 2018 Braskem Alemanha Germany 31.18 31.18 31.18 Braskem America e Braskem America Finance USA 21.00 21.00 21.00 Braskem Argentina Argentina 30.00 30.00 30.00 Braskem Chile Chile 27.00 27.00 27.00 Braskem Holanda, Braskem Holanda Finance and Braskem Holanda Inc Netherlands 25.00 25.00 25.00 Braskem Idesa, Braskem Idesa Serviços, Braskem México - Braskem México Serviços and Braskem México Proyectos Mexico 30.00 30.00 30.00 Braskem India India 30.00
Schedule of changes in balances of deferred tax assets and liabilities	(b.i) Changes in balances of deferred tax assets and liabilities Assets As of December 31, 2018 Impact on the P&L Impact on the equity Other As of December 31, 2019 Impact on the P&L Other As of December 31, 2020 Tax losses (IR) and negative base (CSL) 2,021,578 129,114 2,150,692 1,127,492 3,278,184 Goodwill amortized 39,282 (17,605) 21,677 (15,157) 6,520 Exchange variations 39,959 1,092,392 1,132,351 2,685,264 3,817,615 Temporary adjustments (i) 802,170 1,555,097 2,357,267 2,639,070 4,996,337 Business combination 159,572 (74,033) 85,539 (29,328) 56,211 Tax credits 176,290 110,080 (236,537) 49,833 27,199 77,032 Other 62,288 62,288 (16,922) 45,366 3,238,851 2,857,333 (236,537) 5,859,647 6,417,618 12,277,265 Liabilities Amortization of goodwill based on future profitability 723,336 (651) 722,685 (463) 722,222 Tax depreciation 1,009,912 893,115 1,903,027 1,834,142 3,737,169 Temporary adjustments 276,700 155,887 432,587 (274,355) 158,232 Business combination 1,302 1,302 1,302 Present value adjustment and amortized cost 57,167 (45,891) 11,276 68,644 79,920 Hedge accounting (419,269) 419,269 1,788,568 (1,788,568) Amortization of fair value adjustments on 444,075 (50,302) 393,773 (114,452) 279,321 Long term incentive plan - LTI (5,843) 5,843 (4,823) 4,823 Health care 43,734 (43,734) (8,020) 8,020 Other 3,783 94,938 (93,284) 5,437 407,069 (408,981) 3,525 2,516,275 665,718 288,094 3,470,087 3,696,310 (2,184,706) 4,981,691 Net 722,576 2,191,615 (288,094) (236,537) 2,389,560 2,721,308 2,184,706 7,295,574 Presentation in the balance sheet: Non-current assets 1,104,158 2,662,596 8,529,972 (-) Non-current liabilities 381,582 273,036 1,234,398 (i) Temporary provisions include the deferred tax on provision for geological event in Alagoas (R$3,190 million), contingencies (R$424 million), among other provisions.
Schedule of deferred taxes offset for the purpose of presentation in the balance sheet	(b.ii) Offset for the purpose of presentation in the statement of financial position 2020 Headquarters (Country) Tax calculation Offsetting Balance Assets Braskem S.A. Brazil 8,626,703 (2,090,002) 6,536,701 Braskem Argentina Argentina 2,850 2,850 Braskem America USA 293,942 (293,942) Braskem Alemanha Germany 47,277 47,277 Braskem Chile Chile 287 287 Braskem Idesa Mexico 3,213,624 (1,356,693) 1,856,931 Braskem Idesa Serviços Mexico 14,765 14,765 Braskem México Serviços Mexico 8,503 8,503 Cetrel Brazil 23,645 (5,269) 18,376 DAC Brazil 45,669 (1,387) 44,282 12,277,265 (3,747,293) 8,529,972 Liabilities Braskem S.A Brazil 2,090,002 (2,090,002) Braskem America USA 1,528,340 (293,942) 1,234,398 Braskem Idesa Mexico 1,356,693 (1,356,693) Cetrel Brazil 5,269 (5,269) DAC Brazil 1,387 (1,387) 4,981,691 (3,747,293) 1,234,398 2019 Headquarters (Country) Tax calculation Offsetting Balance Assets Braskem S.A. Brazil 3,679,547 (2,072,130) 1,607,417 Braskem Argentina Argentina 1,010 1,010 Braskem Alemanha Germany 28,176 28,176 Braskem Chile Chile 162 (162) Braskem Idesa Mexico 2,056,723 (1,117,641) 939,082 Braskem México Serviços Mexico 9,677 9,677 Cetrel Brazil 24,313 (5,846) 18,467 DAC Brazil 60,039 (1,272) 58,767 5,859,647 (3,197,051) 2,662,596 Liabilities Braskem S.A Brazil 2,072,130 (2,072,130) Braskem America USA 271,285 271,285 Braskem Chile Chile 1,913 (162) 1,751 Braskem Idesa Mexico 1,117,641 (1,117,641) Cetrel Brazil 5,846 (5,846) DAC Brazil 1,272 (1,272) 3,470,087 (3,197,051) 273,036
Schedule of deferred income tax and social contribution	Realization of deferred income tax and social contribution Balance at Realization December 31, 2026 2029 Assets Note 2020 2021 2022 2023 2024 2025 to 2028 thereafter Tax losses (IR) and negative base (CSL) (i) 3,278,184 223,932 362,165 419,451 566,290 629,925 1,076,421 Goodwill amortized 6,520 4,020 323 323 323 323 968 240 Exchange variations (ii) 3,817,615 1,002,396 155,813 81,553 422,587 88,013 1,050,218 1,017,035 Temporary adjustments (iii) 4,996,337 1,444,987 1,033,617 627,483 39,853 17,380 1,432,993 400,024 Business combination (iv) 56,211 28,963 27,248 Tax credits (v) 77,032 77,032 Other 45,366 45,366 12,277,265 2,781,330 1,579,166 1,128,810 1,029,053 735,641 3,560,600 1,462,665 Liabilities Amortization of goodwill based on future profitability (vi) 722,222 330 303 280 913 1,370 1,917 717,109 Tax depreciation (vii) 3,737,169 857,451 666,224 528,555 528,929 311,245 158,330 686,435 Temporary differences (viii) 158,232 17,581 17,581 17,581 17,581 17,581 52,745 17,582 Business combination (ix) 1,302 1,302 Present value adjustment and amortized cost (x) 79,920 3,826 12,279 1,744 8,967 10,494 22,386 20,224 Amortization of fair value adjustments on the assets from the acquisiton of Braskem Qpar 279,321 35,445 35,445 35,445 35,445 35,445 102,096 Other 3,525 3,525 4,981,691 914,633 731,832 583,605 591,835 376,135 337,474 1,446,177 Net 7,295,574 1,866,697 847,334 545,205 437,218 359,506 3,223,126 16,488 Basis for constitution and realization: (i) In Brazil, the use of tax losses is limited to 30% of the taxable profit for the year; however, the balance does not expire. Meanwhile, in Mexico there is no limit on the amount that can be used in the year; however, the tax losses expire in 10 years. The realization of Tax Losses in the consolidated results consider the taxable profit expected by the Company over a 10-year horizon. For the Braskem S.A., this realization is associated with the completion of administrative processes related to years in which such tax losses were sustained. (ii) In Brazil, the Company opted to tax exchange variation of assets and liabilities denominated in foreign currency under the cash method. Thus, this variation will be realized as assets and liabilities are received/paid. For accounting purposes, exchange variation is recognized under the accrual basis, which results in the recognition of deferred IR and CSL. (iii) Accounting expenses not yet deductible for calculating income tax and social contribution, whose recognition for tax purposes occurs in subsequent periods. In 2019 and 2020, the provisioning of expenses arising from the geological event in Alagoas produced a material impact. (iv) Refers to: tax-related goodwill and contingencies recognized from business combinations. Tax realization of goodwill occurs upon the merger of the investments and contingencies arising from write-offs due to the settlement or reversal of the processes involved. (v) Tax credits arising from the balance of tax paid on profit abroad and the worker’s food program. (vi) Goodwill for the future profitability of the merged companies is not amortized since the adoption of Law 11.638/07. Tax realization is associated with the write-off of goodwill due to impairment or upon divestment. (vii) For calculation of IR and CSL, assets are depreciated at rates higher than those used for accounting purposes. As tax depreciation is exhausted, these deferred IR and CSL start to be realized. (viii) Accounting provisions of transaction costs in financing acquisitions. (ix) Fair value adjustments on property, plant and equipment and intangible assets identified in business combinations, whose tax realization is based on the depreciation and amortization of these assets. (x) Additional adjustment, upon adoption of Law 11.638/07, of property, plant and equipment, whose tax realization is based on the depreciation of assets.

23 Sundry provisions (Tables)

23 Sundry provisions (Tables)	12 Months Ended
	Dec. 31, 2020
Sundry Provisions
Schedule of sundry provisions	2020 2019 Provision for environmental damages (a) 602,490 365,155 Provision for customers rebates (b) 123,465 84,110 Other 148,253 55,941 Total 874,208 505,206 Current liabilities 362,407 203,134 Non-current liabilities 511,801 302,072 Total 874,208 505,206
Schedule of changes in sundry provisions	(c) Changes in provisions Recovery of environmental Rebate damage Other Total December 31, 2018 88,026 307,546 28,970 424,542 Additions, monetary adjustments and exchange variation 74,299 144,617 34,194 253,110 Write-offs through usage and payments (78,215) (87,008) (7,223) (172,446) December 31, 2019 84,110 365,155 55,941 505,206 Additions, monetary adjustments and exchange variation 150,132 306,274 119,831 576,237 Write-offs through usage and payments (110,777) (68,939) (27,519) (207,235) December 31, 2020 123,465 602,490 148,253 874,208

24 Contingencies (Tables)

24 Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure Of Contingencies Abstract
Schedule of claims with probable chance of loss and claims arising from business combinations with possible loss	24.1 Claims with probable chance of loss and contingent liabilities arising from business combinations 2020 2019 Labor claims (a) 280,066 315,437 Tax claims (b) Normal operations IR and CSL 57,662 22,284 PIS and COFINS (i) 226,742 196,356 ICMS 14,104 70,645 Other tax claims 19,759 18,475 318,267 307,760 Business Combination IR and CSL 3,680 3,581 PIS and COFINS (ii) 65,041 63,291 ICMS - interstate purchases (iii) 305,747 297,456 374,468 364,328 Corporate claims (c) 126,057 118,485 Civil claims and other 52,229 45,514 1,151,087 1,151,524 (a) Labor claims The provision on December 31, 2020 is related to 529 labor claims, including occupational health and security cases (604 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors, estimate that the term for the termination of these types of claims in Brazil exceeds five years. The estimates related to the outcome of proceedings and the possibility of future disbursement may change in view of new decisions in higher courts. (b) Tax claims On December 31, 2020, the main claims are the following: (i) Non-cumulative PIS and COFINS The Company is charged amounts arising from compensation of Non-Cumulative PIS and COFINS tax credits in the years 2005, 2010 and in the period from 2012 to 2016 that were not approved by the Federal Revenue Service of Brazil ("RFB"), mainly related to the following topics: · Offsetting Statements (“DCOMPs”), with credits in amounts that exceeded those declared in the respective Statement of Calculation of Social Contributions (“DACONs”); · freight expenses: not associated with sales operations and/or operations without proven association and contracted in the country, but concerning imported products; · credits arising from the acquisition of property, plant and equipment mostly related to acquired companies, whose documentation was not found; · taxation of taxable revenues incorrectly classified as tax exempt, subject to zero tax rate or not taxed. On December 31, 2020, the balance of this provision was R$197,707 (R$193,139 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors and considering the precedents on the matters at the Administrative Council of Tax Appeals (“CARF”), estimates that the administrative procedures will be concluded in 2025. (ii) PIS and COFINS taxes The Company is assessed for the payment of these taxes in many legal and administrative claims, such as: · Insufficient payment of COFINS for the period from March 1999 to December 2000, from February 2001 to March 2002, from May to July 2002 and September 2002 due to alleged calculation errors, and non-compliance with the widening the tax calculation base and increasing the contribution rate envisaged in Law 9.718/98; · Offset of the COFINS dues relating to September and October 1999 using the credit resulting from the addition of 1% to the COFINS rate; · Rejection of the offset of PIS and COFINS dues relating to the period from February to April 2002 using the PIS credits under Decree-Laws 2.445 and 2.449, calculated between June 1990 and October 1995, under the argument that the time period for using said credits had expired; and · Alleged non-taxation of revenue from foreign exchange variations, determined as a result of successive reductions in the capital of the associated company. On December 31, 2020, the balance of this provision was R$65,041 (R$63,291 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors. Management estimates the administrative procedures will conclude in 2023 and the court decisions in 2030. Guarantees were offered for court claims in the form of bank guarantee and finished products, which, together, cover the amount of claims. (iii) ICMS - interstate purchases In 2009, the merged company Braskem Qpar was assessed by the Finance Department of the State of São Paulo for the payment of ICMS in view of allegedly committing the following violations: · Undue use of ICMS tax credits in the amount of R$58,164, due to the recording of credits indicated in the invoices for the sale of “acrylonitrile,” “methyl acrylate” and “methyl methacrylate,” issued by Acrinor Acrilonitrila do Nordeste S/A and Proquigel Química S/A, since the products were to be exported, and were therefore exempt from payment of ICMS tax; · The fine for the abovementioned tax offense corresponds to 100% of the principal value recorded, as per Article 527, item II, sub-item “j” jointly with paragraphs 1 and 10 of RICMS/SP; · Fine in the amount of 30% on R$480,389, which corresponds to the sum of the amounts indicated in tax documents whose outflow of goods was not identified by the tax authority, entered based on the provisions of Article 527, item IV, sub-item “b” jointly with paragraphs 1 and 10 of RICMS/SP; and · Fine due to lack of presentation of tax documents requested under a specific deficiency notice, as per Article 527, item IV, sub-item “j” jointly with paragraphs 8 and 10 of RICMS/SP. After ending the discussions in the administrative sphere in 2015 with the partial reduction in contingency, the Company proposed lawsuits to continue the discussion. On December 31, 2020, the balance of this provision was R$305,747 (R$297,456 in 2019). The Management of Braskem, based on its assessment and of its external legal advisors. Management estimates the legal procedures will conclude in 2026. These lawsuits are secured by a guarantee insurance. (c) Corporate claims It is an ordinary collection claim combined with a request for damages for losses, in which a former shareholder requests the payment of dividends and a share bonus arising from the class "A" preferred shares of the dissolved company Salgema Indústrias Químicas S.A. Once the claims were granted, the amount effectively owed by Braskem began to be calculated. During this phase, the judge recognized that dividends and bonus related to the years prior to 1987 had become time-barred. However, the Alagoas State Court of Appeals reviewed the decision to include that the amounts related to such period also were owed by Braskem. Against the decision, Braskem filed a Special Appeal with the Superior Court of Justice (“STJ”), which was partially granted. Currently, the Company awaits the decision of the STJ regarding the merits of the appeal (i.e., the time-barring of the right of the shareholder to receive dividends for said period). On December 31, 2020, Braskem recognized a provision for a possible negative ruling of R$66,957 (R$64,305 in 2019).
Schedule of changes in claims with probable chance of loss	(d) Changes in claims with probable chance of loss Corporate Civil claims Labor claims Tax claims claims and other Total December 31, 2018 177,751 607,079 111,049 69,438 965,317 Additions, monetary adjustments and exchange variation 322,102 98,618 7,436 11,465 439,621 Payments (83,189) (6,348) (3,918) (93,455) Reversals (101,227) (27,261) (31,471) (159,959) December 31, 2019 315,437 672,088 118,485 45,514 1,151,524 Additions, inflation adjustments and exchange variation 140,386 130,302 10,242 32,207 313,137 Payments (42,174) (21,649) (9,166) (72,989) Reversals (133,583) (88,006) (2,670) (16,326) (240,585) December 31, 2020 280,066 692,735 126,057 52,229 1,151,087
Schedule of claims with probable chance of loss	24.2 Claims and contingent liabilities with possible chance of loss Note 2020 2019 Tax claims (a) 11,911,746 6,199,283 Civil claims - Alagoas 26 796,712 33,973,320 Civil claims - Other (b) 708,120 769,126 Labor claims (c) 663,448 642,229 Environmental claims (d) 507,973 166,897 Social security claims (e) 326,730 29,830 Other lawsuits (f) 530,927 350,016 Total 15,445,656 42,130,701

26 Geological event - Alagoas (

26 Geological event - Alagoas (Tables)	12 Months Ended
	Dec. 31, 2020
Geological Event - Alagoas
Schedule of changes in the provision	The following table shows the changes in the provision in the fiscal year: Consolidated Balance at December 31, 2019 3,383,067 Provisions 7,116,146 Constitution of present value adjusment (214,319) 6,901,827 Write-offs (*) (1,181,931) Realization of present value adjusment 72,814 Balance at December 31, 2020 9,175,777 Current liability 4,349,931 Non-current liability 4,825,846 9,175,777 (*) Of this amount, R$1,137,736 refers to payments made and R$44.195 was reclassified to suppliers.

27 Benefits offered to team m_2

27 Benefits offered to team members (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of defined benefit plans [abstract]
Schedule of short-term benefits	The liability is recognized at the amount of the expected payment if the Company has a legal or constructive obligation to pay the amount due to services rendered by an employee in the past and the obligation can be reliably estimated. 2020 2019 2018 Health care 197,683 181,466 162,338 Private pension 94,302 90,687 84,525 Transport 66,752 67,761 64,714 Feeding 38,400 35,677 33,537 Life insurance 9,875 7,997 5,964 Training 14,892 26,261 27,463 Other 14,117 12,164 12,307 436,021 422,013 390,848
Schedule of defined benefit obligations	(i) Amounts in statement of financial position 2020 2019 Defined benefit Novamont Braskem America 113,662 80,593 Braskem Idesa 17,243 11,408 Braskem Alemanha and Netherlands 239,955 153,564 370,860 245,565 Health care Bradesco saúde 217,089 224,852 Total obligations 587,949 470,417 Fair value of plan assets Novamont Braskem America (113,662) (79,784) Braskem Alemanha (2,213) (1,558) (115,875) (81,342) Consolidated net balance (non-current liabilities) 472,074 389,075
Schedule of changes in defined benefit obligations	(ii) Change in obligations Consolidated 2020 2019 2018 Health Benefit Health Benefit Health Benefit insurance plans Total insurance plans Total insurance plans Total Balance at beginning of year 224,852 245,487 470,339 90,679 183,609 274,288 83,233 156,957 240,190 Current service cost 4,678 12,486 17,164 2,698 8,233 10,931 1,398 5,842 7,240 Interest cost 17,097 6,482 23,579 8,663 6,133 14,796 8,293 4,906 13,199 Benefits paid (5,949) (7,409) (13,358) (5,817) (4,677) (10,494) (2,669) (3,845) (6,514) Change plan 8,068 8,068 1,391 1,391 Actuarial losses (gain) (23,589) 25,803 2,214 128,629 38,437 167,066 424 (3,713) (3,289) Exchange variation 87,933 87,933 5,684 5,684 22,149 22,149 Balance at the end of the year 217,089 370,782 587,871 224,852 245,487 470,339 90,679 183,687 274,366
Schedule of changes in fair value plan assets	(iii) Change in fair value plan assets 2020 2019 2018 Balance at beginning of year 81,342 67,993 46,415 Actual return on plan assets 15,791 14,329 (3,200) Employer contributions 285 20,544 Benefits paid (4,973) (3,966) (3,712) Exchange variation 23,715 2,701 7,868 Balance at the end of the year 115,875 81,342 67,915
Schedule of amounts recognized in profit and loss	(iv) Amounts recognized in profit and loss Consolidated 2020 2019 2018 Health Benefit Health Benefit Health Benefit insurance plans Total insurance plans Total insurance plans Total Current service cost 4,678 12,486 17,164 2,698 8,233 10,931 1,398 5,842 7,240 Interest cost 17,097 6,482 23,579 8,663 6,133 14,796 8,293 4,906 13,199 Actuarial losses 15,461 15,461 28,936 28,936 2,500 2,500 21,775 34,429 56,204 11,361 43,302 54,663 9,691 13,248 22,939
Schedule of actuarial assumptions	(v) Actuarial assumptions (%) 2020 2019 2018 Health United Health United Health United insurance States Mexico Germany Netherlands insurance States Mexico Germany Netherlands insurance States Germany Netherlands Discount rate 3.99 2.60 7.25 0.70 0.70 3.60 3.35 7.25 2.00 2.00 5.03 4.45 2.00 2.00 Inflation rate 3.25 n/a 4.00 2.00 2.00 4.00 n/a 4.00 2.00 2.00 4.50 n/a 2.00 2.00 Expected return on plan assets n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Rate of increase in future salary levels n/a n/a 5.00 3.00 3.00 n/a n/a 5.00 3.00 3.00 n/a n/a 3.00 3.00 Rate of increase in future pension plan n/a n/a n/a 1.75 1.75 n/a n/a n/a 1.75 1.75 n/a n/a 1.75 1.75 Aging factor 2.50 n/a n/a n/a n/a 2.50 n/a n/a n/a n/a 2.50 n/a n/a n/a Medical inflation 3.50 n/a n/a n/a n/a 3.50 n/a n/a n/a n/a 3.50 n/a n/a n/a Duration 14.99 n/a n/a n/a n/a 15.32 n/a n/a n/a n/a 19.66 n/a n/a n/a
Schedule of sensitivity analysis	Impact on the defined benefit obligation Premise change Premise increase Premise reduction Health United Health United Health United insurance States Mexico Germany Netherlands insurance States Mexico Germany Netherlands insurance States Mexico Germany Netherlands Discount rate 1.0% 1.0% 1.0% 0.5% 0.5% 26,427 15,262 1,502 23,415 1,248 (32,925) (13,210) (1,796) (27,317) (1,446) Real medical inflation n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Rate of increase in future salary levels n/a n/a n/a 0.5% 0.5% n/a n/a n/a 14,158 740 n/a n/a n/a (13,353) (698) Rate of increase in future pension plan 1.0% n/a n/a 0.25% 0.25% (5,335) n/a n/a 6,978 365 5,391 n/a n/a (6,772) (354) Life expectancy 1.0% n/a n/a 1 year 1 year 41,186 n/a n/a 5,985 313 (32,503) n/a n/a (6,247) (327) Mortality rate n/a 10.0% n/a n/a n/a n/a 6,215 n/a n/a n/a n/a (1,662) n/a n/a n/a Health insurance - Impact on cost of services and interests costs Premise change Premise increase Premise reduction Cost of Iterests Cost of Iterests Cost of Iterests services costs services costs services costs Discount rate 1.0% 1.0% 774 22 (1,017) 112 Life expectancy 1.0% 1.0% 654 3,035 (543) (2,395) Rate of increase in future pension plan 1.0% 1.0% 116 393 (120) (397)

28 Equity (Tables)

28 Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Shareholders' equity
Schedule of shares distributed	On December 31, 2020 and 2019, the Company's subscribed and paid up capital stock amounted to R$8,043,222 and comprised 797,218,554 shares with no par value, distributed as follows: Amount of shares Preferred Preferred Common shares shares shares % class A % class B % Total % Novonor 226,334,623 50.11 79,182,498 22.95 305,517,121 38.33 Petrobras 212,426,952 47.03 75,761,739 21.96 288,188,691 36.15 ADR (i) 29,268,378 8.48 29,268,378 3.67 Other 12,907,077 2.86 159,612,179 46.26 500,230 100.00 173,019,486 21.70 Total 451,668,652 100.00 343,824,794 99.65 500,230 100.00 795,993,676 99.85 Treasury shares 1,224,878 0.35 1,224,878 0.15 Total 451,668,652 100.00 345,049,672 100.00 500,230 100.00 797,218,554 100.00 Authorised 535,661,731 616,682,421 593,818 1,152,937,970 (i) American Depositary Receipts traded on the New York Stock Exchange (USA).
Schedule of changes in shares	Changes in shares during the year: Amount of shares Note 2019 Changes 2020 Outstanding shares Common shares 451,668,652 451,668,652 Preferred shares class A (d) 343,823,073 1,721 343,824,794 Preferred shares class B 500,230 500,230 795,991,955 1,721 795,993,676 Treasury shares Preferred shares class A (d) 1,226,599 (1,721) 1,224,878 Total 797,218,554 797,218,554
Schedule of accumulated losses in the year	The balance of accumulated losses in the year was partially absorbed by the profit reserves and capital reserves, as follows: 2020 Loss for the year (6,691,720) Equity valuation adjustments: 27,043 Other (2,585) Adjusted loss (6,667,262) Absorption through the use of reserves: Revenue reserves Retention of profits 1,174,301 Tax incentive 153,478 Legal reserve 577,476 1,905,255 Capital reserve 232,460 Accumulated losses for the year (4,529,547)
Schedule of other comprehensive income	(f) Other comprehensive income Attributed to shareholders' interest Deemed cost Defined Foreign and additional Gain (loss) Foreign benefit currency Total indexation of Fair value on interest sales Cash flow plans actuarial translation Braskem Non-controlling PP&E adjustments in subsidiary hedge hedge Gain (loss) adjustment shareholders' interest in (ii) (iii) (i) (iv) (iv) (v) (vi) interest Braskem Idesa Total On December 31, 2017 178,893 (9,404) (6,358,242) (145,267) (52,005) 1,220,533 (5,165,492) (477,975) (5,643,467) Additional indexation Realization by depreciation or write-off assets (40,481) (40,481) (40,481) Income tax and social contribution 13,764 13,764 13,764 Deemed cost of jointly-controlled investment Realization by depreciation or write-off assets (1,458) (1,458) (1,458) Income tax and social contribution 496 496 496 Fair value adjustments Accounts receivable (449) (449) (449) Foreign sales hedge Exchange rate (3,133,346) (3,133,346) 4,170 (3,129,176) Transfer to result 1,200,209 1,200,209 59,143 1,259,352 Income tax and social contribution 664,864 664,864 (18,994) 645,870 Fair value of Cash flow hedge Change in fair value (196,790) (196,790) 7,722 (189,068) Transfer to result 26,964 26,964 10,386 37,350 Income tax and social contribution 59,914 59,914 (5,433) 54,481 Fair value of cash flow hedge from jointly-controlled (RPR) (2,329) (2,329) (2,329) Actuarial loss with post-employment benefits, net of taxes (1,569) (1,569) (1,569) ILP PLan fair value Change in fair value 9,297 9,297 133 9,430 Income tax and social contribution (2,891) (2,891) (2,891) Foreign currency translation adjustment 946,342 946,342 (145,119) 801,223 (Loss) gain from investments (65) (65) 65 On December 31, 2018 151,214 5,957 (9,469) (7,626,515) (257,508) (53,574) 2,166,875 (5,623,020) (565,902) (6,188,922) Additional indexation Realization by depreciation or write-off assets (40,481) (40,481) (40,481) Income tax and social contribution 13,764 13,764 13,764 Deemed cost of jointly-controlled investment Realization by depreciation or write-off assets (1,338) (1,338) (1,338) Income tax and social contribution 455 455 455 Fair value adjustments Accounts receivable 15 15 15 Foreign sales hedge Exchange rate (507,464) (507,464) 116,202 (391,262) Transfer to result 1,585,480 1,585,480 66,787 1,652,267 Income tax and social contribution (344,567) (344,567) (54,897) (399,464) Fair value of Cash flow hedge Change in fair value 7,150 7,150 (23,078) (15,928) Transfer to result 54,450 54,450 16,752 71,202 Income tax and social contribution (21,703) (21,703) 1,898 (19,805) Fair value of cash flow hedge from jointly-controlled (RPR) (978) (978) (978) Actuarial loss with post-employment benefits, net of taxes (109,492) (109,492) (109,492) ILP PLan fair value Change in fair value 19,415 19,415 348 19,763 Income tax and social contribution (5,842) (5,842) (5,842) Foreign currency translation adjustment 220,228 220,228 (83,506) 136,722 (Loss) gain from investments (50) (50) (34) (84) Effect of CPC 42 / IAS 29 - hyperinflation (3,561) (3,561) (3,561) On December 31, 2019 123,614 19,545 (9,469) (6,893,066) (218,589) (163,066) 2,383,492 (4,757,539) (525,430) (5,282,969) Attributed to shareholders' interest Deemed cost Defined Foreign and additional Gain (loss) Foreign benefit currency Total indexation of Fair value on interest sales Cash flow plans actuarial translation Braskem Non-controlling PP&E adjustments in subsidiary hedge hedge Gain (loss) adjustment shareholders' interest in (ii) (iii) (i) (iv) (iv) (v) (vi) interest Braskem Idesa Total On December 31, 2019 123,614 19,545 (9,469) (6,893,066) (218,589) (163,066) 2,383,492 (4,757,539) (525,430) (5,282,969) Additional indexation Realization by depreciation or write-off assets (39,853) (39,853) (39,853) Income tax and social contribution 13,551 13,551 13,551 Deemed cost of jointly-controlled investment Realization by depreciation or write-off assets (1,123) (1,123) (1,123) Income tax and social contribution 382 382 382 Fair value adjustments Accounts receivable 113 113 113 Foreign sales hedge Exchange rate (7,215,247) (7,215,247) (111,363) (7,326,610) Transfer to result 2,547,855 2,547,855 117,932 2,665,787 Income tax and social contribution 1,587,701 1,587,701 (1,965) 1,585,736 Fair value of Cash flow hedge Change in fair value (545,038) (545,038) 7,613 (537,425) Transfer to result (47,223) (47,223) (15,742) (62,965) Income tax and social contribution 200,393 200,393 2,439 202,832 Fair value of cash flow hedge from jointly-controlled (RPR) 1,260 1,260 1,260 Actuarial loss with post-employment benefits, net of taxes (648) (648) 1 (647) ILP PLan fair value Change in fair value 16,452 16,452 (415) 16,037 Income tax and social contribution (4,823) (4,823) (4,823) Foreign currency translation adjustment 3,054,126 3,054,126 (396,084) 2,658,042 Other 3,695 3,695 3,695 Effect of CPC 42 / IAS 29 - hyperinflation 8,077 8,077 8,077 On December 31, 2020 96,571 31,287 (5,774) (9,972,757) (609,197) (163,714) 5,445,695 (5,177,889) (923,014) (6,100,903) (i) Transfer to the income statement when divestment or transfer of control of subsidiary. (ii) Transfer to retained earnings as the asset is depreciated or written-off/sold. (iii) For receivables classified as fair value through other comprehensive income, transfer to the income statement when attainment of jurisdiction or early liquidation. For the ILP Plan, Transfer to retained earnings according to the grace period of the plan. (iv) Transfer to the income statement when maturity, prepayment or loss of efficacy for hedge accounting. (v) Transfer to retained earnings when the extinction of the plan. (vi) Transfer to the income statement when write-off of subsidiary abroad.

29 Earnings per share (Tables)

29 Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings per share [abstract]
Schedule of earnings per share reconciliation	The table below shows the reconciliation of profit or loss for the period adjusted for the amounts used to calculate basic and diluted earnings per share. Basic and diluted 2020 2019 2018 Profit (loss) for the year attributed to Company's shareholders (6,691,720) (2,540,995) 2,827,650 Distribution of priority dividends attributable to: Preferred shares class "A" 208,450 Preferred shares class "B" 303 208,753 Distribution of 6% ​​of unit price of common shares 273,840 Distribution of excess profits, by class: Common shares 1,331,513 Preferred shares class "A" 1,013,544 2,345,057 Reconciliation of income available for distribution, by class (numerator): Common shares (3,797,070) (1,441,839) 1,605,353 Preferred shares class "A" (2,890,444) (1,097,559) 1,221,994 Preferred shares class "B" (4,205) (1,597) 303 (6,691,719) (2,540,995) 2,827,650 Weighted average number of shares, by class (denominator): Common shares 451,668,652 451,668,652 451,668,652 Preferred shares class "A" 343,823,811 343,820,162 343,808,699 Preferred shares class "B" 500,230 500,230 512,660 795,992,693 795,989,044 795,990,011 (Loss) profit per share (in R$) Common shares (8.4068) (3.1922) 3.5543 Preferred shares class "A" (8.4068) (3.1922) 3.5543 Preferred shares class "B" (8.4068) (3.1922) 0.5910 Weighing of shares 2020 Preferred shares Class "A" Outstanding Weighted shares average Amount at beginning of year 343,823,073 343,823,073 Incentive long term plan payments with treasury shares 1,721 738 Amount at the end of the year 343,824,794 343,823,811 2019 Preferred shares Class "A" Outstanding Weighted shares average Amount at beginning of year 343,814,914 343,814,914 Incentive long term plan payments with treasury shares 8,159 5,248 Amount at the end of the year 343,823,073 343,820,162 2018 Preferred shares Class "A" Class "B" Outstanding Weighted Outstanding Weighted shares average shares average Amount at beginning of year 343,775,864 343,775,864 578,330 578,330 Conversion of preferred shares class "B" to "A" 39,050 32,835 (78,100) (65,670) Amount at the end of the year 343,814,914 343,808,699 500,230 512,660

30 Net revenues (Tables)

30 Net revenues (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue [abstract]
Schedule of sales and service revenue	2020 2019 2018 Sales revenue Domestic market Revenue 43,356,596 38,391,132 42,189,365 Rebates (99,786) (57,315) (45,290) 43,256,810 38,333,817 42,144,075 Foreign market Revenue 26,362,457 23,998,067 26,577,433 Rebates (49,966) (47,723) (58,188) 26,312,491 23,950,344 26,519,245 69,569,301 62,284,161 68,663,320 Sales and services deductions Taxes Domestic market (10,726,404) (9,704,712) (10,219,138) Foreign market (40,383) (31,427) (36,562) Sales returns Domestic market (161,207) (138,749) (148,918) Foreign market (97,813) (85,748) (258,836) (11,025,807) (9,960,636) (10,663,454) Net sales and services revenue 58,543,494 52,323,525 57,999,866
Schedule of revenue by country	(a) Net revenue by country 2020 2019 2018 Brazil 32,369,199 28,523,327 31,801,222 United States 10,848,609 9,416,558 9,887,701 Mexico 2,765,815 2,335,198 4,168,140 Argentina 1,267,967 1,104,044 1,166,191 Singapore 1,183,838 1,162,432 756,069 Germany 1,106,877 1,157,431 1,385,482 Italy 811,787 690,422 650,605 Switzerland 633,512 759,189 315,254 Japan 618,940 240,579 245,208 Luxembourg 592,777 526,768 546,524 Chile 544,329 610,454 686,646 China 496,920 542,209 884,233 Peru 471,847 551,967 540,495 Netherlands 432,897 516,409 293,315 Uruguay 405,946 359,049 155,571 South Korea 360,704 279,900 314,517 Sweden 310,984 296,601 270,062 Canada 297,756 201,635 290,453 Poland 285,714 200,563 260,449 Spain 282,362 344,433 329,458 Paraguay 254,255 194,859 214,959 France 247,062 225,986 135,094 United Kingdom 204,953 359,937 366,328 Bolivia 190,447 231,848 250,048 Taiwan 176,400 191,593 274,566 Colombia 174,381 200,370 363,497 Other 1,207,216 1,099,764 1,447,779 58,543,494 52,323,525 57,999,866
Schedule of revenue by product	(b) Net revenue by product 2020 2019 2018 PE/PP 41,137,288 34,287,597 37,979,148 Ethylene, Propylene 3,600,276 3,743,581 4,283,709 Naphtha, condensate and crude oil 915,807 676,044 476,311 Benzene, toluene and xylene 3,051,752 2,503,667 2,785,400 PVC/Caustic Soda/EDC 3,134,617 2,692,778 3,167,390 ETBE/Gasoline 2,170,289 2,319,253 2,928,993 Butadiene 1,372,428 1,609,264 2,023,465 Cumene 636,635 723,469 909,409 Solvents 654,793 505,804 248,313 Other 1,869,609 3,262,068 3,197,728 58,543,494 52,323,525 57,999,866

32 Other income (expenses), n_2

32 Other income (expenses), net (Tables)	12 Months Ended
	Dec. 31, 2020
Other Income Expenses Net
Schedule of other income (expenses), net	Note 2020 2019 2018 Other income 0 PIS and COFINS credits - exclusion of ICMS from the calculation basis 24.4 310,557 1,904,206 235,919 Tax Credits recovery 0 219,254 3,094 46,179 Fixed assets disposal results 0 - 11,140 93,814 Fine on supply contract of raw material, net (i) 41,134 375,020 386,020 Other 0 179,804 114,974 265,290 0 750,749 2,408,434 1,027,222 0 Other expenses 0 Provision for damages - Alagoas 26 (6,901,828) (3,383,067) - Provision for repairing environmental damage 0 (306,275) (141,536) (89,396) Shutdowns and other plants expenses 0 (67,735) (108,192) (91,380) Provision for losses on the fixed asset 0 (51,590) (158,320) (44,420) Fine on sales contracts 0 (42,322) (104,179) (49,487) Allowance for judicial claims, net of reversals 0 (4,008) (136,135) (83,280) Other 0 (564,863) (415,513) (196,750) (7,938,621) (4,446,942) (554,713) (i) The contractual penalty charged from a supplier for failing to supply feedstock to the subsidiary Braskem Idesa at December 31, 2019 is R$335,281 (R$338,125 in 2018).

33 Financial results (Tables)

33 Financial results (Tables)	12 Months Ended
	Dec. 31, 2020
Financial Results
Schedule of financial results	2020 2019 2018 Financial income Interest income 481,059 708,542 530,007 Other 119,125 142,012 59,045 600,184 850,554 589,052 Financial expenses Interest expenses (2,928,803) (2,191,765) (2,084,780) Monetary variations on fiscal debts (138,410) (232,612) (33,429) Discounts granted (81,920) (80,404) (141,223) Loans transaction costs - amortization (172,269) (465,000) (89,982) Adjustment to present value - appropriation (225,889) (348,930) (296,065) Interest expense on leases (164,166) (137,903) Losses on derivatives (809,150) (115,050) (58,102) Other (392,758) (311,121) (303,970) (4,913,365) (3,882,785) (3,007,551) Exchange rate variations, net On financial assets 336,527 (31,137) 1,268,741 On financial liabilities (5,635,238) (1,693,383) (3,525,724) (5,298,711) (1,724,520) (2,256,983) Total (9,611,892) (4,756,751) (4,675,482)

34 Expenses by nature and fun_2

34 Expenses by nature and function (Tables)	12 Months Ended
	Dec. 31, 2020
Expenses by nature [abstract]
Schedule of expenses by nature and function	2020 2019 2018 Classification by nature: Raw materials other inputs (37,913,921) (37,380,310) (38,889,949) Personnel expenses (3,074,305) (3,004,762) (2,412,118) Outsourced services (2,219,413) (3,242,373) (2,306,048) Depreciation and amortization (4,048,081) (3,632,265) (2,990,577) Freights (2,321,740) (2,204,453) (2,275,375) Costs of idle industrial plants (518,528) (309,742) (138,242) Provision - geological event in Alagoas (6,901,828) (3,383,067) PIS and COFINS credits - exclusion of ICMS from the calculation basis 310,557 1,904,206 235,919 Other general and administrative expenses (1,908,729) (927,294) (942,370) Total (58,595,988) (52,180,060) (49,718,760) Classification by function: Cost of products sold (47,331,414) (45,879,118) (46,576,657) Selling and distribution (1,852,055) (1,783,455) (1,689,179) (Loss) reversals for impairment of trade accounts receivable (55,252) (7,069) 87,008 General and administrative (1,918,747) (2,224,180) (1,793,185) Research and development (250,648) (247,730) (219,256) Other income 750,749 2,408,434 1,027,222 Other expenses (7,938,621) (4,446,942) (554,713) Total (58,595,988) (52,180,060) (49,718,760)

35 Segment information (Tables)

35 Segment information (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of operating segments [abstract]
Schedule of results by segment	(b) Results by segment 2020 Operating expenses Net Cost of Selling, general Results from Other operating sales products Gross and distribuition equity income Consolidated revenue sold profit expenses investments (expenses), net Reporting segments Brazil 40,794,387 (32,498,003) 8,296,384 (1,471,722) - (7,082,604) (257,942) USA and Europe 14,638,660 (12,337,486) 2,301,174 (721,191) - (82,695) 1,497,288 Mexico 4,000,805 (3,075,001) 925,804 (436,859) - (364,259) 124,686 Total 59,433,852 (47,910,490) 11,523,362 (2,629,772) - (7,529,558) 1,364,032 Other segments 302,374 (188,350) 114,024 63,874 (19,398) (320) 158,180 Corporate unit (i) - - - (1,493,479) - 359,071 (1,134,408) Braskem consolidated before 59,736,226 (48,098,840) 11,637,386 (4,059,377) (19,398) (7,170,807) 387,804 Eliminations and reclassifications (1,192,732) 767,426 (425,306) (17,325) - (17,065) (459,696) (Loss) profit before net financial expenses and taxes 58,543,494 (47,331,414) 11,212,080 (4,076,702) (19,398) (7,187,872) (71,892) (i) Includes the amount of R$310,557 related to PIS and COFINS tax credits – exclusion of ICMS from the calculation base (Note 10.c). For the purposes of comparability of the new structure of reportable segments, the Company is presenting the fiscal year ended December 31, 2019 and 2018, as follows: 2019 Operating expenses Net Cost of Selling, general Results from Other operating sales products Gross and distribuition equity income Consolidated revenue sold profit expenses investments (expenses), net Reporting segments Brazil 39,142,561 (35,245,941) 3,896,620 (1,852,908) (4,151,901) (2,108,189) USA and Europe 10,044,263 (8,217,515) 1,826,748 (525,701) (23,859) 1,277,188 Mexico 3,051,440 (2,504,012) 547,428 (351,199) 324,682 520,911 Total 52,238,264 (45,967,468) 6,270,796 (2,729,808) (3,851,078) (310,090) Other segments 296,285 (188,335) 107,950 40,306 10,218 4,175 162,649 Corporate unit (i) (1,533,590) 1,773,267 239,677 Braskem consolidated before 52,534,549 (46,155,803) 6,378,746 (4,223,092) 10,218 (2,073,636) 92,236 Eliminations and reclassifications (211,024) 276,685 65,661 (39,342) 35,128 61,447 Profit before net financial expenses and taxes 52,323,525 (45,879,118) 6,444,407 (4,262,434) 10,218 (2,038,508) 153,683 (i) Includes the amount of R$1,904,206 million related to PIS and COFINS tax credits – exclusion of ICMS tax from the calculation base (Note 10.c). 2018 Operating expenses Net Cost of Selling, general Results from Other operating sales products Gross and distribuition equity income Consolidated revenue sold profit expenses investments (expenses), net Reporting segments Brazil 42,078,175 (35,271,203) 6,806,972 (996,754) (78,912) 5,731,306 USA and Europe 11,725,622 (9,195,745) 2,529,877 (464,567) 68,734 2,134,044 Mexico 4,408,814 (2,958,343) 1,450,471 (337,394) 322,076 1,435,153 Total 58,212,611 (47,425,291) 10,787,320 (1,798,715) 311,898 9,300,503 Other segments 292,435 (173,608) 118,827 (33,728) (888) (103) 84,108 Corporate unit (i) (1,807,033) 470,241 (1,336,792) Braskem consolidated before 58,505,046 (47,598,899) 10,906,147 (3,639,476) (888) 782,036 8,047,819 Eliminations and reclassifications (505,180) 1,022,242 517,062 24,864 (309,527) 232,399 Profit before net financial expenses and taxes 57,999,866 (46,576,657) 11,423,209 (3,614,612) (888) 472,509 8,280,218 (i) Includes the amount of R$501.357 (R$265,438 in “Net revenue" and R$235,919 in “Other operating income (expenses), net”) related to PIS and COFINS tax credits – exclusion of ICMS from the calculation basis (Note 10.c).
Schedule of property, plant and equipment and intangible assets by segment	(c) Property, plant and equipment and intangible assets by segment 2020 2019 Reporting segments Brazil 17,299,352 17,863,336 USA and Europe 7,242,262 4,852,760 Mexico 13,892,609 12,020,051 Total 38,434,223 34,736,147 Unallocated amounts 323,617 341,122 Total 38,757,840 35,077,269

36 Insurance coverage (Unaudi_2

36 Insurance coverage (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of types of insurance contracts [abstract]
Schedule of insurance policy information	The table below shows information on the Operating Risk policies in effect. The Maximum Indemnification Limits (“LMI”) by event are determined based on studies of maximum loss scenarios prepared by external consultants, considering the nature of the Company’s activity. Additionally, benchmarks with companies from the same segment are conducted for comparison purposes. Maximum indemnity limit Amount insured (i) Maturity US$ million R$ million US$ million R$ million Units in Brazil October 8, 2021 3,500 18,188 27,961 145,305 Units in United States and Germany October 8, 2021 655 3,404 2,680 13,927 Units in Mexico October 8, 2021 2,742 14,249 5,679 29,512 Total 36,320 188,744 (i) Amount for replacement of assets, inventories and loss of profits; (ii) USA LMI was increased with the startup of Delta’s capacity; (iii) Adjusted amounts in renovation dated April 8, 2020.

1 Operations (Details Narrative

1 Operations (Details Narrative) R$ in Thousands	Mar. 01, 2021	Dec. 31, 2020BRL (R$)Numbershares
DisclosureOfOperationsLineItems [Line Items]
Depreciated percentage		29.00%
Number of industrial plants | Number		36
Net working capital		R$ 5800000
Shareholders' equity | shares		(3,900,000)
Cash flow generated from operating activities		R$ 9287354
Events after reporting period [member] | Natural gas transport service agreement [member] | Control del gas natural [member]
DisclosureOfOperationsLineItems [Line Items]
Agreement term	15 years
US
DisclosureOfOperationsLineItems [Line Items]
Percentage of debt denomination		96.00%
Odebrecht S.A. [member]
DisclosureOfOperationsLineItems [Line Items]
Proportion of voting rights		38.32%
Proportion of ownership interest		50.11%

2 Accounting policies (Details)

2 Accounting policies (Details)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Braskem India Private Limited ("Braskem India") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name	[1]	Braskem India Private Limited ("Braskem India")
Headquarters	[1]	India
Total voting interest	[1]	100.00%
BM Insurance Company Limited ("BM Insurance") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		BM Insurance Company Limited ("BM Insurance")
Headquarters		Bermuda
Total voting interest		100.00%	100.00%	100.00%
Braskem America Finance Company ("Braskem America Finance") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem America Finance Company ("Braskem America Finance")
Headquarters		EUA
Total voting interest		100.00%	100.00%	100.00%
Braskem America, Inc. ("Braskem America") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem America, Inc. (“Braskem America”)
Headquarters		EUA
Total voting interest		100.00%	100.00%	100.00%
Braskem Argentina S.A. ("Braskem Argentina") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Argentina S.A. (“Braskem Argentina”)
Headquarters		Argentina
Total voting interest		100.00%	100.00%	100.00%
Braskem Europe GmbH ("Braskem Alemanha") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Europe GmbH ("Braskem Alemanha")
Headquarters		Germany
Total voting interest		100.00%	100.00%	100.00%
Braskem Finance Limited ("Braskem Finance") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Finance Limited (“Braskem Finance”)
Headquarters		Cayman Islands
Total voting interest		100.00%	100.00%	100.00%
Braskem Idesa S.A.P.I. ("Braskem Idesa") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Idesa S.A.P.I. ("Braskem Idesa")
Headquarters		Mexico
Total voting interest		75.00%	75.00%	75.00%
Braskem Idesa Servicios S.A. de CV ("Braskem Idesa Servicos") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Idesa Servicios S.A. de CV ("Braskem Idesa Serviços")
Headquarters		Mexico
Total voting interest		75.00%	75.00%	75.00%
Braskem Incorporated Limited ("Braskem Inc") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Incorporated Limited ("Braskem Inc")
Headquarters		Cayman Islands
Total voting interest		100.00%	100.00%	100.00%
Braskem Mexico Proyectos S.A. de C.V. SOFOM ("Braskem Mexico Sofom") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Mexico Proyectos S.A. de C.V. SOFOM ("Braskem México Sofom")
Headquarters		Mexico
Total voting interest		100.00%	100.00%	100.00%
Braskem Mexico, S. de RL de CV ("Braskem Mexico") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Mexico, S. de RL de CV ("Braskem México")
Headquarters		Mexico
Total voting interest		100.00%	100.00%	100.00%
Braskem Mexico Servicios S. RL de CV ("Braskem Mexico Servicos") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Mexico Servicios S. RL de CV ("Braskem México Serviços")
Headquarters		Mexico
Total voting interest		100.00%	100.00%	100.00%
Braskem Netherlands B.V. ("Braskem Holanda") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Netherlands B.V. ("Braskem Holanda")
Headquarters		Netherlands
Total voting interest		100.00%	100.00%	100.00%
Braskem Netherlands Finance B.V. ("Braskem Holanda Finance") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Netherlands Finance B.V. (“Braskem Holanda Finance”)
Headquarters		Netherlands
Total voting interest		100.00%	100.00%	100.00%
Braskem Netherlands Inc. B.V. ("Braskem Holanda Inc") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Netherlands Inc. B.V. (“Braskem Holanda Inc”)
Headquarters		Netherlands
Total voting interest		100.00%	100.00%	100.00%
Braskem Petroquimica Chile Ltda. ("Braskem Chile") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Braskem Petroquímica Chile Ltda. (“Braskem Chile”)
Headquarters		Chile
Total voting interest		100.00%	100.00%	100.00%
Cetrel S.A. ("Cetrel") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Cetrel S.A. ("Cetrel")
Headquarters		Brazil
Total voting interest		63.70%	63.70%	63.66%
Distribuidora de Agua Camacari S.A. ("DAC") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Distribuidora de Água Camaçari S.A. ("DAC")
Headquarters		Brazil
Total voting interest		63.70%	63.70%	63.66%
Fundo de Investimento Caixa Jupiter Multimercado Credito Privado Longo Prazo ("FIM Jupiter") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Fundo de Investimento Caixa Júpiter Multimercado Crédito Privado Longo Prazo ("FIM Júpiter")
Headquarters		Brazil
Total voting interest		100.00%	100.00%	100.00%
Fundo de Investimento Santander Netuno Multimercado Credito Privado Longo Prazo ("FIM Netuno") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Fundo de Investimento Santander Netuno Multimercado Crédito Privado Longo Prazo ("FIM Netuno")
Headquarters		Brazil
Total voting interest		100.00%	100.00%	100.00%
Lantana Trading Co. Inc. ("Lantana") [member]
Disclosure of subsidiaries [line items]
Subsidiary/Special Purpose Entity name		Lantana Trading Co. Inc. (“Lantana”)
Headquarters		Bahamas
Total voting interest		100.00%	100.00%	100.00%
[1]	Subsidiary incorporated in May 2020.

2 Accounting policies (Details

2 Accounting policies (Details 1)	12 Months Ended
	Dec. 31, 2020
Braskem alemanha [member]
Disclosure of subsidiaries [line items]
Functional currency	Euro
BM Insurance, Braskem America, Braskem America Finance, Braskem Holanda, Braskem Holanda Finance, Braskem Holanda Inc. and Braskem Mexico Sofom [member]
Disclosure of subsidiaries [line items]
Functional currency	U.S.dollar
Braskem Idesa , Braskem Idesa Servicos, Braskem Mexico and Braskem Mexico Servicos [member]
Disclosure of subsidiaries [line items]
Functional currency	Mexican peso
Braskem argentina [member]
Disclosure of subsidiaries [line items]
Functional currency	Argentinean peso
Braskem chile [member]
Disclosure of subsidiaries [line items]
Functional currency	Chilenean peso
Braskem india [member]
Disclosure of subsidiaries [line items]
Functional currency	Rupee

2 Accounting policies (Detail_2

2 Accounting policies (Details 2)	12 Months Ended
	Dec. 31, 2020Number	Dec. 31, 2019Number	Dec. 31, 2018Number
U.S. Dollar - Brazilian Real [member]
Disclosure of subsidiaries [line items]
End of period exchange rate	5.1967	4.0307
End of period exchange rate, variation	28.93%
Average exchange rate	5.1578	3.9461	3.6558
Average exchange rate, variation	30.70%	7.94%
Euro - Brazilian Real [member]
Disclosure of subsidiaries [line items]
End of period exchange rate	6.3779	4.5305
End of period exchange rate, variation	40.78%
Average exchange rate	5.8989	4.4159	4.3094
Average exchange rate, variation	33.58%	2.47%
Mexican Peso - Brazilian Real [member]
Disclosure of subsidiaries [line items]
End of period exchange rate	0.261	0.2134
End of period exchange rate, variation	22.31%
Average exchange rate	0.2402	0.2049	0.1901
Average exchange rate, variation	17.22%	7.80%
U.S. Dollar - Mexican Peso [member]
Disclosure of subsidiaries [line items]
End of period exchange rate	19.924	18.8858
End of period exchange rate, variation	5.50%
Average exchange rate	21.5098	19.2568	19.2363
Average exchange rate, variation	11.70%	0.11%
U.S. Dollar - Euro [member]
Disclosure of subsidiaries [line items]
End of period exchange rate	0.8166	0.8926
End of period exchange rate, variation	(8.52%)
Average exchange rate	0.8775	0.893	0.8471
Average exchange rate, variation	(1.74%)	5.42%

2 Accounting policies (Detail_3

2 Accounting policies (Details Narrative) R$ in Thousands, $ in Thousands	1 Months Ended			3 Months Ended		12 Months Ended
	Jul. 31, 2020BRL (R$)	Apr. 30, 2020USD ($)	Apr. 30, 2020BRL (R$)	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2020USD ($)	Dec. 31, 2020BRL (R$)	Dec. 31, 2019	Jul. 30, 2020USD ($)	Jul. 30, 2020BRL (R$)
Disclosure of subsidiaries [line items]
Revolving credit facility			R$ 5200000
Prepaid revolving credit facility	R$ 5500000
Europe [member]
Disclosure of subsidiaries [line items]
Capicity utilization rates				64.00%	83.00%
Mexico [member]
Disclosure of subsidiaries [line items]
Capicity utilization rates					80.00%
US
Disclosure of subsidiaries [line items]
Revolving credit facility | $		$ 1,000,000
Revolving credit facility, expiration date		2023	2023
Braskem holanda [member]
Disclosure of subsidiaries [line items]
Bonds issued										R$ 3200000
Percentage of fixed cost reduced								9.00%
Braskem holanda [member] | Top of Range [member]
Disclosure of subsidiaries [line items]
Amount of investment							R$ 3900000
Braskem holanda [member] | Bottom of range [member]
Disclosure of subsidiaries [line items]
Amount of investment							R$ 28000000
Braskem holanda [member] | US
Disclosure of subsidiaries [line items]
Bonds issued | $									$ 600,000
Braskem holanda [member] | US | Top of Range [member]
Disclosure of subsidiaries [line items]
Amount of investment | $						$ 721,000
Braskem holanda [member] | US | Bottom of range [member]
Disclosure of subsidiaries [line items]
Amount of investment | $						$ 555,000

3 Application of critical est_3

3 Application of critical estimates and judgments (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Buildings and Improvements [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	2.82%	6.23%
Machinery, Equipment and Installations [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	6.31%	7.04%
Furniture And Fixtures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	10.03%	10.02%
IT Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	20.23%	20.60%
Lab Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	9.57%	9.52%
Security Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	9.54%	9.39%
Vehicles [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	18.89%	18.88%
Other Property, Plant And Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation and depletion rates	13.55%	15.72%

3 Application of critical est_4

3 Application of critical estimates and judgments (Details Narrative)	12 Months Ended
	Dec. 31, 2020
Application Of Critical Estimates And Judgments
Description of intangible assets with indefinite useful life	These tests are based on the projected cash flow in each CGU or groups of CGUs, which are extracted from the business plan of the Company for a five-year period, mentioned in Note 3.2.1, and the Management plan for a period greater than 5 years to reflect industry cycle patterns, in a total projection period of 10 years. Perpetuity is also calculated based on the long-term vision and excluding real growth.

4 Risk management (Details)

4 Risk management (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of financial liabilities [line items]
Trade payables	R$ 44195
Lease	3,207,886	R$ 2676896	R$ 100557
Liquidity Risk [member]
Disclosure of financial liabilities [line items]
Trade payables	9,985,828
Borrowings	84,758,119
Debentures	279,365
Braskem Idesa borrowings	16,659,369
Derivatives	1,892,971
Loan to non-controlling shareholder of Braskem Idesa	4,747,673
Leniency agreement (Note 25)	1,565,367
Lease	3,480,792
Total	123,369,484
Liquidity Risk [member] | Early payment debt [member]
Disclosure of financial liabilities [line items]
Trade payables	9,985,828
Borrowings	84,758,119
Debentures	279,365
Braskem Idesa borrowings	15,850,196
Derivatives	1,892,971
Loan to non-controlling shareholder of Braskem Idesa	4,747,673
Leniency agreement (Note 25)	1,565,367
Lease	3,480,792
Total	122,560,311
Liquidity Risk [member] | 2020 [member]
Disclosure of financial liabilities [line items]
Trade payables	9,978,595
Borrowings	1,439,079
Debentures	56,988
Braskem Idesa borrowings	1,194,805
Derivatives	1,314,675
Loan to non-controlling shareholder of Braskem Idesa
Leniency agreement (Note 25)	399,039
Lease	870,587
Total	15,253,768
Liquidity Risk [member] | 2020 [member] | Early payment debt [member]
Disclosure of financial liabilities [line items]
Trade payables	9,978,595
Borrowings	1,439,079
Debentures	56,988
Braskem Idesa borrowings	8,064,401
Derivatives	1,314,675
Loan to non-controlling shareholder of Braskem Idesa
Leniency agreement (Note 25)	399,039
Lease	870,587
Total	22,123,364
Liquidity Risk [member] | 2022 [member]
Disclosure of financial liabilities [line items]
Trade payables	7,233
Borrowings	4,365,497
Debentures	125,320
Braskem Idesa borrowings	2,340,108
Derivatives	223,813
Loan to non-controlling shareholder of Braskem Idesa
Leniency agreement (Note 25)	313,562
Lease	641,313
Total	8,016,846
Liquidity Risk [member] | 2022 [member] | Early payment debt [member]
Disclosure of financial liabilities [line items]
Trade payables	7,233
Borrowings	4,365,497
Debentures	125,320
Braskem Idesa borrowings
Derivatives	223,813
Loan to non-controlling shareholder of Braskem Idesa
Leniency agreement (Note 25)	313,562
Lease	641,313
Total	5,676,738
Liquidity Risk [member] | Between Two and Five Years [member]
Disclosure of financial liabilities [line items]
Trade payables
Borrowings	7,953,182
Debentures	97,057
Braskem Idesa borrowings	2,911,775
Derivatives	354,483
Loan to non-controlling shareholder of Braskem Idesa
Leniency agreement (Note 25)	852,766
Lease	898,124
Total	13,067,387
Liquidity Risk [member] | Between Two and Five Years [member] | Early payment debt [member]
Disclosure of financial liabilities [line items]
Trade payables
Borrowings	7,953,182
Debentures	97,057
Braskem Idesa borrowings
Derivatives	354,483
Loan to non-controlling shareholder of Braskem Idesa
Leniency agreement (Note 25)	852,766
Lease	898,124
Total	10,155,612
Liquidity Risk [member] | More than five years [member]
Disclosure of financial liabilities [line items]
Trade payables
Borrowings	71,000,361
Debentures
Braskem Idesa borrowings	10,212,681
Derivatives
Loan to non-controlling shareholder of Braskem Idesa	4,747,673
Leniency agreement (Note 25)
Lease	1,070,768
Total	87,031,483
Liquidity Risk [member] | More than five years [member] | Early payment debt [member]
Disclosure of financial liabilities [line items]
Trade payables
Borrowings	71,000,361
Braskem Idesa borrowings	7,785,795
Derivatives
Loan to non-controlling shareholder of Braskem Idesa	4,747,673
Leniency agreement (Note 25)
Lease	1,070,768
Total	R$ 84604597

4. Risk management (Details Nar

4. Risk management (Details Narrative) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Foreign Exchange Risk [member]
Disclosure of financial liabilities [line items]
Description of foreign exchange risk, financial policy requirement	The Company to maintain a percentage of at least 70% of the dollar-denominated portion of net debt. If convenient, the Company may maintain a percentage of more than 70%, although subject to a sensitivity analysis of key financial indicators and proof of the inexistence of significant risk of deterioration of these indicators.
Liquidity Risk [member]
Disclosure of financial liabilities [line items]
Revolving credit facility	R$ 1000000
Revolving credit facility, expiration date	Expires in 2023.
Credit Rsk [member] | Cash and Cash Equivalents and Financial Investments [member]
Disclosure of financial liabilities [line items]
Exposure to credit risk percentage	45.90%

5 Cash and cash equivalents (De

5 Cash and cash equivalents (Details) - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
DisclosureOfCashAndCashEquivalentsLineItems [Line Items]
Total		R$ 13862852	R$ 6803880	R$ 5547637	R$ 3775093
Domestic market [member]
DisclosureOfCashAndCashEquivalentsLineItems [Line Items]
Cash		111,278	13,495
Cash equivalents		8,271,312	1,963,185
Foreign market [member]
DisclosureOfCashAndCashEquivalentsLineItems [Line Items]
Cash	[1]	1,835,685	2,289,736
Cash equivalents	[1]	R$ 3644577	R$ 2537464
[1]	On December 31, 2020, it includes cash of R$284,856 and R$619,577 of cash equivalents (R$598,591 of cash and R$418,644 of cash equivalents on December 31, 2019) of the subsidiary Braskem Idesa, which cannot be used by the other subsidiaries of the Company.

5 Cash and cash equivalents (_2

5 Cash and cash equivalents (Details Narrative) - Foreign market [member] - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019
DisclosureOfCashAndCashEquivalentsLineItems [Line Items]
Cash	[1]	R$ 1835685	R$ 2289736
Cash equivalents	[1]	3,644,577	2,537,464
Braskem idsea [member]
DisclosureOfCashAndCashEquivalentsLineItems [Line Items]
Cash		284,856	619,577
Cash equivalents		R$ 598591	R$ 418644
[1]	On December 31, 2020, it includes cash of R$284,856 and R$619,577 of cash equivalents (R$598,591 of cash and R$418,644 of cash equivalents on December 31, 2019) of the subsidiary Braskem Idesa, which cannot be used by the other subsidiaries of the Company.

6 Financial investments (Detail

6 Financial investments (Details) - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019
DisclosureOfFinancialInvestmentsLineItems [Line Items]
Current assets		R$ 3627227	R$ 1687504
Non-current assets		15,564	9,708
Total		3,642,791	1,697,212
Amortized Cost [member] | Time Deposit Investments [member]
DisclosureOfFinancialInvestmentsLineItems [Line Items]
Total		53,941	38,759
Fair Value Through Profit or Loss [member] | LFT's And LF's [member]
DisclosureOfFinancialInvestmentsLineItems [Line Items]
Total	[1]	2,163,042	1,588,426
Fair Value Through Profit or Loss [member] | Restricted Funds Investments [member]
DisclosureOfFinancialInvestmentsLineItems [Line Items]
Total	[2]	1,338,289	9,708
Fair Value Through Profit or Loss [member] | Other [member]
DisclosureOfFinancialInvestmentsLineItems [Line Items]
Total		R$ 87519	R$ 60319
[1]	These refer to Brazilian floating-rate government bonds ("LFTs") issued by the Brazilian federal government and floating-rate bonds ("LFs") issued by financial institutions. These bonds have original maturity above three months, immediate liquidity in the secondary market and Management expects their realization in the short term.
[2]	Includes the following amounts: R$1,322,725 in restricted funds used in the program for relocation of residents in Alagoas (Note 26.1(i)); and R$15,564 of bank deposits with yields of approximately 100% of the Interbank Deposit Rate ("CDI"), and their use is related to the fulfillment of the contractual obligations of the debentures.

6 Financial investments (Deta_2

6 Financial investments (Details Narrative) - Fair Value Through Profit or Loss [member] - Restricted Funds Investments [member] - Interbank Deposit Rate [member] R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
DisclosureOfFinancialInvestmentsLineItems [Line Items]
Deposits yields rate	100.00%
Restricted fund	R$ 1322725
Bank deposits	R$ 15564

7 Trade accounts receivable (De

7 Trade accounts receivable (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	R$ 4928215		R$ 2535974
Allowance for doubtful accounts	(173,007)	[1]	(229,323)	[1]	R$ 233625
Total	4,755,208		2,306,651
Current assets	4,731,979		2,285,750
Non-current assets	23,229		20,901
Total	4,755,208		2,306,651
Domestic market [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	2,325,075		1,058,226
Domestic market [member] | Third Parties [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	2,304,212		1,049,412
Domestic market [member] | Related Parties [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	20,863		8,814
Foreign market [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	2,603,140		1,477,748
Foreign market [member] | Third Parties [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	R$ 2603140		R$ 1477748
[1]	Company's expected credit losses are determined based on the following stages: Stage 1 - in this stage, expected credit losses are calculated based on the actual experience of credit loss (write-off) over the last five years, segregating customers in accordance with their Operating Risk. Stage 2 - when there is deterioration in the credit risk, the Company considers receivables that were renegotiated and that could be collected in court, regardless of their maturity. Stage 3 - includes financial assets that have objective evidence of impairment; the trigger for evidence of impairment is the delay, without previous clarification, of more than 180 days.

7 Trade accounts receivable (_2

7 Trade accounts receivable (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable	R$ 4928215		R$ 2535974
Allowance for doubtful accounts	173,007	[1]	R$ 229323	[1]	R$ 233625
Stage 1 (Performing) [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable	4,731,034
Allowance for doubtful accounts	R$ 5525
Stage 1 (Performing) [member] | Operation Risk 1 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Description of estimated loss percentage	Minimum risk
Trade accounts receivable	R$ 2976880
Stage 1 (Performing) [member] | Operation Risk 2 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Description of estimated loss percentage	Minimum risk
Trade accounts receivable	R$ 1121976
Stage 1 (Performing) [member] | Operation Risk 3 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	0.80%
Trade accounts receivable	R$ 577145
Allowance for doubtful accounts	R$ 4617
Stage 1 (Performing) [member] | Operation Risk 4 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	1.65%
Trade accounts receivable	R$ 55033
Allowance for doubtful accounts	908
Stage 2 (Significant Increase in Loss Risk) [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable	33,097
Allowance for doubtful accounts	R$ 3398
Stage 2 (Significant Increase in Loss Risk) [member] | 1st Renegotiation Lower Than 24 Months [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	25.00%
Trade accounts receivable	R$ 1273
Allowance for doubtful accounts	R$ 318
Stage 2 (Significant Increase in Loss Risk) [member] | Between 90 and 180 Days [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	30.00%
Trade accounts receivable	R$ 8393
Allowance for doubtful accounts	R$ 2518
Stage 2 (Significant Increase in Loss Risk) [member] | Operation risk 1 and 2 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Description of estimated loss percentage	Minimum risk
Trade accounts receivable	R$ 20619
Stage 2 (Significant Increase in Loss Risk) [member] | Operation risk 3 and 4 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	20.00%
Trade accounts receivable	R$ 2812
Allowance for doubtful accounts	562
"Stage 3 (No Payment Performance - Indicative of Impairment) [member]"
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable	164,084
Allowance for doubtful accounts	R$ 164084
"Stage 3 (No Payment Performance - Indicative of Impairment) [member]" | Between 90 and 180 Days [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	100.00%
Trade accounts receivable	R$ 10797
Allowance for doubtful accounts	R$ 10797
"Stage 3 (No Payment Performance - Indicative of Impairment) [member]" | Operation risk 5 [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	100.00%
Trade accounts receivable	R$ 12675
Allowance for doubtful accounts	R$ 12675
"Stage 3 (No Payment Performance - Indicative of Impairment) [member]" | Legal [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Estimated loss percentage	100.00%
Trade accounts receivable	R$ 140612
Allowance for doubtful accounts	R$ 140612
[1]	Company's expected credit losses are determined based on the following stages: Stage 1 - in this stage, expected credit losses are calculated based on the actual experience of credit loss (write-off) over the last five years, segregating customers in accordance with their Operating Risk. Stage 2 - when there is deterioration in the credit risk, the Company considers receivables that were renegotiated and that could be collected in court, regardless of their maturity. Stage 3 - includes financial assets that have objective evidence of impairment; the trigger for evidence of impairment is the delay, without previous clarification, of more than 180 days.

7 Trade accounts receivable (_3

7 Trade accounts receivable (Details 2) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019
Trade Accounts Receivable
Balance of provision at the beginning of the year		R$ 229323	[1]	R$ 233625
Provision in the year		(65,571)		(59,885)
Reversal in the year		28,563		45,501
Write-offs		93,324		18,686
Balance of provision at the end of the year	[1]	R$ 173007		R$ 229323
[1]	Company's expected credit losses are determined based on the following stages: Stage 1 - in this stage, expected credit losses are calculated based on the actual experience of credit loss (write-off) over the last five years, segregating customers in accordance with their Operating Risk. Stage 2 - when there is deterioration in the credit risk, the Company considers receivables that were renegotiated and that could be collected in court, regardless of their maturity. Stage 3 - includes financial assets that have objective evidence of impairment; the trigger for evidence of impairment is the delay, without previous clarification, of more than 180 days.

7 Trade accounts receivable (_4

7 Trade accounts receivable (Details 3) - BRL (R$) R$ in Thousands	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	R$ 4928215		R$ 2535974
Allowance for doubtful accounts	(173,007)	[1]	(229,323)	[1]	R$ 233625
Total	4,755,208		2,306,651
Not Past Due [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	4,368,714		2,001,326
Up To 90 Days [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	396,953		318,852
91 To 80 Days [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	6,272		15,368
As Of 180 Days [member]
DisclosureOfTradeAccountsReceivableLineItems [Line Items]
Trade accounts receivable, gross	R$ 156276		R$ 200428
[1]	Company's expected credit losses are determined based on the following stages: Stage 1 - in this stage, expected credit losses are calculated based on the actual experience of credit loss (write-off) over the last five years, segregating customers in accordance with their Operating Risk. Stage 2 - when there is deterioration in the credit risk, the Company considers receivables that were renegotiated and that could be collected in court, regardless of their maturity. Stage 3 - includes financial assets that have objective evidence of impairment; the trigger for evidence of impairment is the delay, without previous clarification, of more than 180 days.

7 Trade accounts receivable (_5

7 Trade accounts receivable (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Trade Accounts Receivable
Trade accounts receivable billing period	Average receivables term is generally 30 days
Trade accounts receivables negotiated	R$ 1800000	R$ 2000000
Financial expenses	R$ 12000

8 Inventories (Details)

8 Inventories (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Inventories Abstract
Finished goods	R$ 4258561	R$ 4634192
Raw materials, production inputs and packaging	2,008,510	1,665,797
Maintenance materials	749,536	608,693
Advances to suppliers	86,745	68,382
Imports in transit	1,298,334	664,345
Total	8,401,686	7,641,409
Current assets	8,383,650	7,625,084
Non-current assets	18,036	16,325
Total	R$ 8401686	R$ 7641409

8 Inventories (Details 1)

8 Inventories (Details 1) - Provision [member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other provisions [line items]
Beginning balance	R$ 82195	R$ 20159
Additions	120,483	72,672
Utilization/reversals	(80,106)	(10,636)
Ending balance	R$ 122557	R$ 82195

9 Related parties (Details)

9 Related parties (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets
Trade accounts receivable	R$ 4731979	R$ 2285750
Inventories	8,383,650	7,625,084
Dividends and interest on capital	165	3,074
Total assets	86,083,919	68,129,037
Current liabilities
Trade payables	9,946,315	9,116,989
Payable notes	235,324	133,858
Other payables	466,341	930,638
Loan to non-controlling shareholders of Braskem Idesa	3,222,493	2,395,887
Sales of products	58,543,494	52,323,525	R$ 57999866
Purchases of raw materials, finished goods services and utilities	47,331,414	45,879,118	46,576,657
Financial income (expenses), net	(9,611,892)	(4,756,751)	(4,675,482)
Other income (expenses)	(7,187,872)	(2,038,508)	472,509
General and administrative expenses	1,918,747	2,224,180	1,793,185
Novonor and subsidiaries and associates [member]
Current liabilities
Trade payables	33,100	12,402
Payable notes		58
Total liabilities	33,100	12,460
Purchases of raw materials, finished goods services and utilities	(133,127)	(293,501)	(460,480)
Financial income (expenses), net	(452)	(96)
Other income (expenses)		(34,873)	4,214
Petrobras and subsidiaries [member]
Current assets
Trade accounts receivable	6,354	4,257
Inventories	35,998	17,242
Total assets	42,352	21,499
Current liabilities
Trade payables	601,203	133,759
Other payables	478	1,420
Total liabilities	601,681	135,179
Sales of products	182,521	665,417	1,225,443
Purchases of raw materials, finished goods services and utilities	(14,566,840)	(12,584,453)	(15,540,144)
Financial income (expenses), net	(3,810)	(5)	(49)
Other related parties [member]
Current assets
Trade accounts receivable	14,509	4,557
Dividends and interest on capital	165	3,074
Total assets	14,674	7,631
Current liabilities
Trade payables	9,641	9,819
Other payables	119	136
Loan to non-controlling shareholders of Braskem Idesa	3,222,493	2,395,887
Total liabilities	3,232,253	2,405,842
Sales of products	326,825	588,785	736,192
Purchases of raw materials, finished goods services and utilities	(20,350)	(10,738)	(3,800)
Financial income (expenses), net	(818)	(10,967)	(106,516)
Post-employment benefits plan ("EPE") Private pension ("Vexty")	(46,738)	(50,889)	(48,514)
Associates companies, jointly-controlled investment and related companies [member]
Current assets
Trade accounts receivable	20,863	8,814
Inventories	35,998	17,242
Dividends and interest on capital	165	3,074
Total assets	57,026	29,130
Current liabilities
Trade payables	643,944	155,980
Payable notes		58
Other payables	597	1,556
Loan to non-controlling shareholders of Braskem Idesa	3,222,493	2,395,887
Total liabilities	3,867,034	2,553,481
Sales of products	509,346	1,254,202	1,961,635
Purchases of raw materials, finished goods services and utilities	(14,720,317)	(12,888,692)	(16,004,424)
Financial income (expenses), net	(5,080)	(11,068)	(106,565)
Other income (expenses)		(34,873)	4,214
Post-employment benefits plan ("EPE") Private pension ("Vexty")	R$ 46738	R$ 50889	R$ 48514

9 Related parties (Details 1)

9 Related parties (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related party transactions [abstract]
Short-term benefits	R$ 74943	R$ 70366	R$ 60922
Post-employment benefit	961	1,104	989
Long term incentive plan	7,456	14,724	4,404
Total	R$ 83360	R$ 86194	R$ 66315

9 Related parties (Details Narr

9 Related parties (Details Narrative) - BRL (R$) R$ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Jun. 30, 2020	Apr. 30, 2020	Mar. 31, 2020
Disclosure of transactions between related parties [line items]
Sales		R$ 47331414	R$ 45879118	R$ 46576657
Petroleo Riograndanse S.A. ("RPR") [member]
Disclosure of transactions between related parties [line items]
Sales		93,632	257,295
New and/or renewed agreements with related companies [member] | Novonor S.A [member]
Disclosure of transactions between related parties [line items]
Related parties amount	R$ 45408
Related parties estimated value	R$ 669000
Borrowings terms	P7Y
Agreement with petrobras [member] | Petrobras and subsidiaries [member]
Disclosure of transactions between related parties [line items]
Related parties estimated value							R$ 89100	R$ 76161
Agreement with petrobras [member] | Alberto Pasqualini Refinery (REFAP) [member]
Disclosure of transactions between related parties [line items]
Related parties amount		31,730	24,981
Related parties estimated value						R$ 240000
Two Naphtha Supply Agreements [member] | Petrobras and subsidiaries [member]
Disclosure of transactions between related parties [line items]
Related parties amount		18,200
Related parties estimated value		5,000,000	2,500,000
Sales Option Agreement [member] | Petrobras and subsidiaries [member]
Disclosure of transactions between related parties [line items]
Related parties estimated value						R$ 30000000
Amendments With Transpetro [member]
Disclosure of transactions between related parties [line items]
Related parties amount		53,688	79,123
Related parties estimated value		620,500	107,361
Agreement With Petrocoque [member]
Disclosure of transactions between related parties [line items]
Related parties amount		34,141	42,835
Related parties estimated value					R$ 325600
Second Amendment Agreement [member]
Disclosure of transactions between related parties [line items]
Related parties amount		183,476	236,913
Related parties estimated value		268,338
Gasoline to petrobras distribuidora S.A [member] | Petrobras and subsidiaries [member]
Disclosure of transactions between related parties [line items]
Related parties amount		592,013	R$ 901574
Related parties estimated value		482,400
Agreement With Transpetro [member]
Disclosure of transactions between related parties [line items]
Related parties estimated value		28,878
Petrobras [member]
Disclosure of transactions between related parties [line items]
Related parties estimated value		9,200,000
Petrobras [member] | Sale Agreement [Member]
Disclosure of transactions between related parties [line items]
Related parties amount		2,800
Related parties estimated value		25,000
Board of directors [member] | New and/or renewed agreements with related companies [member]
Disclosure of transactions between related parties [line items]
Related parties amount		60,000
Board of directors [member] | New and/or renewed agreements with related companies [member] | Top of Range [member]
Disclosure of transactions between related parties [line items]
Related parties amount		R$ 20000

10 Taxes recoverable (Details)

10 Taxes recoverable (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	R$ 2265402	R$ 3495729
Current taxes recoverable	1,192,665	1,238,011
Noncurrent taxes recoverable	1,072,737	2,257,718
Parent company and subsidiaries in brazil [member] | IPI [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	1,435	477
Parent company and subsidiaries in brazil [member] | Value-added tax on sales and services (ICMS) - normal operations [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	293,193	255,945
Parent company and subsidiaries in brazil [member] | ICMS - credits from PP&E [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	163,847	166,824
Parent company and subsidiaries in brazil [member] | Social integration program (PIS) and social contribution on revenue [meber]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	199	45,604
Parent company and subsidiaries in brazil [member] | PIS and COFINS - credits from PP&E [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	353,928	316,973
Parent company and subsidiaries in brazil [member] | REINTEGRA program [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	16,799	19,848
Parent company and subsidiaries in brazil [member] | Federal supervenience [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	1,109,122	2,459,293
Parent company and subsidiaries in brazil [member] | Other Taxes Recoverable [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	40,234	5,434
Foreign subsidiaries [member] | Other Taxes Recoverable [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	9,470	7,701
Foreign subsidiaries [member] | Value-Added Tax ("IVA") [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	R$ 277175	R$ 217630

10 Taxes recoverable (Details N

10 Taxes recoverable (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	R$ 2265402	R$ 3495729
Total tax assets	1,002,605	2,350,817
Tax assets current		783,199
Tax assets non current		1,567,618
REINTEGRA program [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Amount of tax credits	7,494	9,157
Offset amount of tax	9,959	9,532
PIS and COFINS taxes [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	438,044	2,048,782
Other operating income expenses [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	310,557	1,904,206
Financial income [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	127,488	207,582
Current assets [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable	R$ 1002605	2,350,817
Non-current assets [member]
DisclosureOfTaxesRecoverableLineItems [Line Items]
Taxes recoverable		R$ 783199

11 Investments (Details)

11 Investments (Details) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of associates [line items]
Net profit (loss) for the year		R$ 7015306	R$ 2640398	R$ 2868185
Equity		R$ 3866518	3,944,706	5,654,670	R$ 5472800
RPR [member]
Disclosure of associates [line items]
Investment name		RPR
Interest in total and voting capital (%)	[1]	33.20%
Net profit (loss) for the year	[1]	R$ 63525	29,687	6,358
Equity	[1]	R$ 32217	93,025
Odebrecht Comercializadora de Energia S.A. ("OCE") [member]
Disclosure of associates [line items]
Investment name		Odebrecht Comercializadora de Energia S.A. ("OCE")
Net profit (loss) for the year	[2]			(48)
Borealis [member]
Disclosure of associates [line items]
Investment name		Borealis
Interest in total and voting capital (%)	[3]	20.00%
Net profit (loss) for the year	[3]	R$ 6019	17,622	R$ 2900
Equity	[3]	R$ 161363	R$ 164086
[1]	RPR - its main activities are the refine, processing and sale and import of oil, its byproducts and correlated products.
[2]	Entity closed in June 2018.
[3]	Borealis - its main activities are the production and commercialization of petrochemical byproducts and correlated products.

11 Investments (Details 1)

11 Investments (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of associates [line items]
Balance at beginning	R$ 63843	R$ 65954
Dividends and interest on equity	(1,912)	(7,297)
Equity in results of investees	(19,889)	12,899
Other comprehensive income	1,067	(7,769)
Other	44	56
Balance at end	R$ 43153	63,843
Associate Borealis [member]
Disclosure of associates [line items]
Domestic associate name	Borealis
Balance at beginning	R$ 32816	32,776
Dividends and interest on equity	(1,748)	(3,002)
Equity in results of investees	1,204	3,042
Balance at end	R$ 32272	32,816
Associate RPR [member]
Disclosure of associates [line items]
Domestic associate name	RPR
Balance at beginning	R$ 30887	33,094
Dividends and interest on equity	(164)	(4,295)
Equity in results of investees	(21,093)	9,857
Other comprehensive income	1,067	(7,769)
Balance at end	R$ 10697	30,887
Associate Other [member]
Disclosure of associates [line items]
Domestic associate name	Other
Balance at beginning	R$ 140	84
Other	44	56
Balance at end	R$ 184	R$ 140

11 Investments (Details 2)

11 Investments (Details 2) - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Curent
Cash and cash equivalents		R$ 13862852	R$ 6803880	R$ 5547637	R$ 3775093
Financial investments		3,627,227	1,687,504
Trade accounts receivable		4,731,979	2,285,750
Inventories		8,383,650	7,625,084
Taxes recoverable		1,192,665	1,238,011
Income tax and social contribution		1,547,916	439,933
Derivatives		33,769	4,712
Judicial deposits			2,571,683
Other receivables		810,186	732,997
Current assets		34,190,244	23,389,554
Non-current
Financial investments		15,564	9,708
Taxes recoverable		1,072,737	2,257,718
Income tax and social contribution		72,267	239,847
Deferred tax		8,529,972	2,662,596
Derivatives		34,091	17,877
Judicial deposits		196,911	1,508,880
Other receivables		268,745	296,091
Investments		43,153	63,843
Property, plant and equipment		35,929,149	32,315,181	31,759,890
Intangible		2,828,691	2,762,088
Right of use of assets		2,902,395	2,605,654
Non-current assets		51,893,675	44,739,483
Total assets		86,083,919	68,129,037
Current
Trade payables		9,946,315	9,116,989
Borrowings		1,318,931	774,924
Debentures		54,436	46,666
Braskem Idesa Borrowings		7,660,128	744,408
Payroll and related charges		814,566	623,723
Taxes payable		952,689	322,886
Income tax and social contribution		284,129	34,856
Lease		895,109	676,291
Provision - geological event in Alagoas		4,349,931	1,450,476
Other financial liabilities			516,933
Other payables		2,110,940	1,908,008
Current liabilities		28,387,174	16,216,160
Non-current
Loan agreements		40,413,192	28,242,052
Braskem Idesa Borrowings		4,399,110	9,237,318
Debentures		181,679	227,901
Loan to non-controlling shareholders of Braskem Idesa		3,222,493	2,395,887
Income tax and social contribution		576,174
Deferred income tax and social contribution		1,234,398	273,036
Lease		2,312,777	2,000,605
Provision - geological event in Alagoas		4,825,846	1,932,591
Other payables		4,397,594	3,658,781
Non-current liabilities		61,563,263	47,968,171
Shareholders' equity
Attributable to the company's shareholders		(2,202,306)	4,885,298
Non-controlling interest in subsidiaries		(1,664,212)	(940,592)
Shareholders' equity		(3,866,518)	3,944,706	R$ 5654670	R$ 5472800
Total liabilities and shareholders' equity		86,083,919	68,129,037
Consolidated Braskem Without The Effect Of Braskem Idesa Consolidated [member]
Curent
Cash and cash equivalents		12,958,419	5,786,645
Financial investments		3,627,227	1,687,504
Trade accounts receivable		4,386,825	1,973,414
Inventories		7,876,485	7,028,641
Taxes recoverable		1,144,355	1,084,055
Income tax and social contribution		1,547,916	439,933
Derivatives		33,769	4,712
Judicial deposits			2,571,683
Other receivables		688,944	393,593
Current assets		32,263,940	20,970,180
Non-current
Financial investments		15,564	9,708
Taxes recoverable		847,399	2,257,652
Income tax and social contribution		72,267	239,847
Deferred tax		6,658,276	1,713,837
Related parties		9,122,666	6,729,486
Derivatives		34,091	17,877
Judicial deposits		196,911	1,508,880
Other receivables		251,398	295,586
Investments		43,153	63,843
Property, plant and equipment		22,295,803	20,488,870
Intangible		2,568,869	2,568,347
Right of use of assets		2,509,484	2,309,506
Non-current assets		44,615,881	38,203,439
Total assets		76,879,821	59,173,619
Current
Trade payables		9,753,762	8,903,168
Borrowings		1,318,931	774,924
Debentures		54,436	46,666
Payroll and related charges		776,134	598,147
Taxes payable		927,039	306,453
Income tax and social contribution		284,129	34,856
Lease		821,695	619,217
Provision - geological event in Alagoas		4,349,931	1,450,476
Other financial liabilities			516,933
Other payables		1,947,569	1,798,865
Current liabilities		20,233,626	15,049,705
Non-current
Loan agreements		40,413,192	28,242,052
Debentures		181,679	227,901
Loan to non-controlling shareholders of Braskem Idesa	[1]
Income tax and social contribution		576,174
Deferred income tax and social contribution		1,234,398	273,036
Provision for losses on subsidiaries		5,283,264	3,082,173
Lease		1,962,235	1,767,314
Provision - geological event in Alagoas		4,825,846	1,932,591
Other payables		4,274,837	3,625,695
Non-current liabilities		58,751,625	39,150,762
Shareholders' equity
Attributable to the company's shareholders		(2,202,306)	4,886,089
Non-controlling interest in subsidiaries		96,876	87,063
Shareholders' equity		(2,105,430)	4,973,152
Total liabilities and shareholders' equity		76,879,821	59,173,619
Braskem Idesa Consolidated [member]
Curent
Cash and cash equivalents	[2]	904,433	1,017,235
Trade accounts receivable	[2]	577,530	331,838
Inventories	[2]	507,165	596,443
Taxes recoverable	[2]	48,310	153,956
Other receivables	[2]	121,242	339,404
Current assets	[2]	2,158,680	2,438,876
Non-current
Taxes recoverable	[2]	225,338	66
Deferred tax	[2]	1,871,696	948,759
Related parties	[3]
Other receivables	[2]	17,347	505
Property, plant and equipment	[2],[4]	14,436,012	12,537,615
Intangible	[2]	259,822	193,741
Right of use of assets	[2]	392,911	296,148
Non-current assets	[2]	17,203,126	13,976,834
Total assets	[2]	19,361,806	16,415,710
Current
Trade payables	[2]	424,929	233,323
Braskem Idesa Borrowings	[2]	7,660,128	744,408
Payroll and related charges	[2]	38,432	25,576
Taxes payable	[2]	25,650	16,433
Lease	[2]	73,414	57,074
Other payables	[2]	163,371	109,143
Current liabilities	[2]	8,385,924	1,185,957
Non-current
Braskem Idesa Borrowings	[2]	4,399,110	9,237,318
Accounts payable to related parties	[2],[3]	9,140,064	6,714,236
Loan to non-controlling shareholders of Braskem Idesa	[2]	3,222,493	2,395,887
Provision for losses on subsidiaries	[2],[5]
Lease	[2]	350,542	233,291
Other payables	[2]	122,757	33,086
Non-current liabilities	[2]	17,234,966	18,613,818
Shareholders' equity
Attributable to the company's shareholders	[2]	(6,259,084)	(3,384,065)
Shareholders' equity	[2]	(6,259,084)	(3,384,065)
Total liabilities and shareholders' equity	[2]	19,361,806	16,415,710
Eliminations [member]
Curent
Trade accounts receivable		(232,376)	(19,502)
Current assets		(232,376)	(19,502)
Non-current
Related parties		(9,122,666)	(6,729,486)
Property, plant and equipment		(802,666)	(711,304)
Non-current assets		(9,925,332)	(7,440,790)
Total assets		(10,157,708)	(7,460,292)
Current
Trade payables		(232,376)	(19,502)
Current liabilities		(232,376)	(19,502)
Non-current
Accounts payable to related parties		(9,140,064)	(6,714,236)
Provision for losses on subsidiaries		(5,283,264)	(3,082,173)
Non-current liabilities		(14,423,328)	(9,796,409)
Shareholders' equity
Attributable to the company's shareholders		6,259,084	3,383,274
Non-controlling interest in subsidiaries		(1,761,088)	(1,027,655)
Shareholders' equity		4,497,996	2,355,619
Total liabilities and shareholders' equity		R$ 10157708	R$ 7460292
[1]	Loan payable, maturing December 2029 and 7% p.a., to the non-controlling shareholder. These proceeds were used by Braskem Idesa to fund its construction project.
[2]	Consolidation of Braskem Idesa with its direct subsidiary Braskem Idesa Servicos.
[3]	Loan from Braskem Holanda as part of shareholders' contribution to the Braskem Idesa project.
[4]	Adjustment corresponding to the capitalization of a portion of financial charges of the abovementioned loan.
[5]	Provision recorded in the subsidiary Braskem Holanda for the negative shareholders' equity of Braskem Idesa.

11 Investments (Details 3)

11 Investments (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [line items]
Net revenue	R$ 58543494	R$ 52323525	R$ 57999866
Cost of products sold	(47,331,414)	(45,879,118)	(46,576,657)
Gross profit	11,212,080	6,444,407	11,423,209
Income (expenses)
Selling and distribution	(1,852,055)	(1,783,455)	(1,689,179)
(Loss) reversals for impairment of trade accounts receivable	(55,252)	(7,069)	87,008
General and administrative	(1,918,747)	(2,224,180)	(1,793,185)
Research and development	(250,648)	(247,730)	(219,256)
Results from equity investments	(19,398)	10,218	(888)
Other income	750,749	2,408,434	1,027,222
Other expenses	(7,938,621)	(4,446,942)	(554,713)
Operating profit	(71,892)	153,683	8,280,218
Financial results
Financial expenses	(4,913,365)	(3,882,785)	(3,007,551)
Financial income	600,184	850,554	589,052
Exchange rate variations, net	(5,298,711)	(1,724,520)	(2,256,983)
Finance income (cost)	(9,611,892)	(4,756,751)	(4,675,482)
(Loss) profit before income tax and social contribution	(9,683,784)	(4,603,068)	3,604,736
IR and CSL - current and deferred	2,668,478	1,962,670	(736,551)
IR and CSL - current and deferred	2,668,478	1,962,670	(736,551)
(Loss) profit for the year	(7,015,306)	(2,640,398)	2,868,185
Consolidated Braskem Without The Effect Of Braskem Idesa Consolidated [member]
Disclosure of subsidiaries [line items]
Net revenue	55,779,528	49,961,286	54,851,243
Cost of products sold	(45,563,723)	(44,111,980)	(44,928,721)
Gross profit	10,215,805	5,849,306	9,922,522
Income (expenses)
Selling and distribution	(1,609,844)	(1,582,794)	(1,495,507)
(Loss) reversals for impairment of trade accounts receivable	(55,074)	(4,772)	87,008
General and administrative	(1,739,541)	(2,082,002)	(1,669,277)
Research and development	(250,648)	(247,730)	(219,256)
Results from equity investments	1,026,922	326,427	(76,821)
Other income	748,923	2,102,684	656,725
Other expenses	(7,573,874)	(4,466,450)	(502,795)
Operating profit	(1,291,175)	(758,185)	6,856,241
Financial results
Financial expenses	(3,851,233)	(3,009,471)	(2,227,544)
Financial income	1,032,530	1,135,118	867,185
Exchange rate variations, net	(4,823,269)	(1,768,850)	(2,014,205)
Finance income (cost)	(7,641,972)	(3,643,203)	(3,374,564)
(Loss) profit before income tax and social contribution	(8,933,147)	(4,401,388)	3,481,677
IR and CSL - current and deferred	2,253,684	1,873,207	(639,394)
IR and CSL - current and deferred	2,253,684	1,873,207	(639,394)
(Loss) profit for the year	(6,679,463)	(2,528,181)	2,842,283
Braskem Idesa Consolidated [member]
Disclosure of subsidiaries [line items]
Net revenue	4,046,581	3,050,420	3,766,371
Cost of products sold	(3,112,129)	(2,509,060)	(2,314,998)
Gross profit	934,452	541,360	1,451,373
Income (expenses)
Selling and distribution	(242,211)	(200,661)	(193,672)
(Loss) reversals for impairment of trade accounts receivable	(178)	(2,297)
General and administrative	(179,350)	(141,269)	(123,576)
Other income	1,826	305,750	370,497
Other expenses	(364,747)	19,508	(51,918)
Operating profit	149,792	522,391	1,452,704
Financial results
Financial expenses	(1,505,628)	(1,205,412)	(1,090,019)
Financial income	11,150	47,534	31,879
Exchange rate variations, net	(482,125)	75,610	(232,064)
Finance income (cost)	(1,976,603)	(1,082,268)	(1,290,204)
(Loss) profit before income tax and social contribution	(1,826,811)	(559,877)	162,500
IR and CSL - current and deferred	414,794	89,463	(97,157)
IR and CSL - current and deferred	414,794	89,463	(97,157)
(Loss) profit for the year	(1,412,017)	(470,414)	65,343
Eliminations [member]
Disclosure of subsidiaries [line items]
Net revenue	(1,282,615)	(688,181)	(617,748)
Cost of products sold	1,344,438	741,922	667,062
Gross profit	61,823	53,741	49,314
Income (expenses)
General and administrative	144	(909)	(332)
Results from equity investments	(1,007,524)	(336,645)	77,709
Operating profit	1,069,491	389,477	(28,727)
Financial results
Financial expenses	443,496	332,098	310,012
Financial income	(443,496)	(332,098)	(310,012)
Exchange rate variations, net	6,683	(31,280)	(10,714)
Finance income (cost)	6,683	(31,280)	(10,714)
(Loss) profit before income tax and social contribution	1,076,174	358,197	(39,441)
(Loss) profit for the year	R$ 1076174	R$ 358197	R$ 39441

11 Investments (Details 4)

11 Investments (Details 4) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [line items]
(Loss) profit before income tax and social contribution	R$ 9683784	R$ 4603068	R$ 3604736
Adjustments for reconciliation of profit (loss)
Depreciation and amortization	4,048,081	3,632,265	2,990,577
Results from equity investments	(19,398)	10,218	(888)
Interest and monetary and exchange variations, net	10,457,272	4,145,110	6,013,944
Reversal of provisions	336,838	320,439	23,725
Provision - geological event in Alagoas	6,901,828	3,383,067
PIS and COFINS credits - exclusion of ICMS from the calculation basis	(310,557)	(1,904,206)	(519,830)
Loss (reversals) for impairment of trade accounts receivable	55,252	7,069	(87,008)
Provision for losses and write-offs of long-lived assets	8,794	225,204	72,470
Adjustments for reconciliation of profit	11,833,122	5,195,662	12,099,502
Changes in operating working capital
Other financial assets	3,746,107	(3,680,460)
Financial investments	(1,860,827)	797,445	98,349
Trade accounts receivable	(2,187,826)	895,046	223,418
Inventories	(252,534)	867,817	(1,537,290)
Taxes recoverable	1,532,554	1,195,427	1,022,242
Prepaid expenses	293,785	202,732	(105,163)
Other receivables	397,103	(273,665)	(248,988)
Trade payables	(3,001,564)	282,445	1,343,375
Taxes payable	449,761	(569,793)	(977,248)
Advances from customers	198,988	197,965	(199,958)
Leniency agreement	(349,842)	(341,605)	(330,006)
Sundry provisions	(145,355)	(215,548)	(116,458)
Other payables	(1,366,118)	362,203	833,227
Cash generated (used) from operations	9,287,354	4,915,671	12,105,002
Interest paid	(2,736,821)	(2,238,445)	(1,916,801)
Income tax and social contribution paid	(257,542)	(411,951)	(937,831)
Net cash generated (used) by operating activities	6,292,991	2,265,275	9,250,370
Proceeds from the sale of fixed assets and intangible assets	33,140	12,590	95,133
Proceeds from the sale of investments			81,000
Funds received in the investments' capital reduction			2,254
Dividends received	4,822	3,513	41,791
Acquisitions to property, plant and equipment and intangible assets	(2,759,789)	(2,682,522)	(2,706,328)
Other investments			(2,167)
Net cash used in investing activities	(2,721,827)	(2,666,419)	(2,488,317)
Short-term and Long-term debt
Acquired	13,049,459	20,586,103	4,301,626
Payments	(8,734,505)	(17,425,409)	(6,592,197)
Braskem Idesa borrowings
Acquired		3,497,622
Payments	(905,210)	(4,398,453)	(812,929)
Related parties
Acquired loans (payment of loans)	(37,618)
Lease	(662,068)	(454,190)
Dividends paid	(2,380)	(668,904)	(1,499,900)
Other financial liabilities	(534,456)	499,999
Cash generated (used) in financing activities	2,173,222	1,636,768	(4,603,400)
Exchange variation on cash of foreign subsidiaries	1,314,586	20,619	(386,109)
Increase (decrease) in cash and cash equivalents	7,058,972	1,256,243	1,772,544
Cash and cash equivalents at the beginning of the year	6,803,880	5,547,637
Cash and cash equivalents at the end of the year	13,862,852	6,803,880	5,547,637
Increase in cash and cash equivalents	7,058,972	1,256,243	1,772,544
Consolidated Braskem Without The Effect Of Braskem Idesa Consolidated [member]
Disclosure of subsidiaries [line items]
(Loss) profit before income tax and social contribution	(8,933,147)	(4,401,388)	3,481,677
Adjustments for reconciliation of profit (loss)
Depreciation and amortization	2,995,609	2,732,181	2,228,978
Results from equity investments	1,026,922	326,427	(76,821)
Interest and monetary and exchange variations, net	8,541,980	3,050,987	4,658,342
Reversal of provisions	336,838	320,439	23,725
Provision - geological event in Alagoas	6,901,828	3,383,067
PIS and COFINS credits - exclusion of ICMS from the calculation basis	(310,557)	(1,904,206)	(519,830)
Loss (reversals) for impairment of trade accounts receivable	8,794	224,825	69,270
Provision for losses and write-offs of long-lived assets	55,252	7,069	(87,008)
Adjustments for reconciliation of profit	10,623,519	3,739,401	9,778,333
Changes in operating working capital
Other financial assets	3,746,107	(3,680,460)
Financial investments	(1,860,827)	797,445	98,349
Trade accounts receivable	(2,247,729)	677,176	251,683
Inventories	(309,492)	825,236	(1,337,618)
Taxes recoverable	1,584,911	1,216,225	1,068,637
Prepaid expenses	(172,027)	85,549	(67,051)
Other receivables	44,513	(242,727)	(12,596)
Trade payables	(2,926,585)	330,633	1,113,381
Taxes payable	965,191	(485,309)	(828,222)
Advances from customers	224,764	176,189	(218,623)
Leniency agreement	(349,842)	(341,605)	(330,006)
Sundry provisions	(158,915)	(226,519)	(116,458)
Other payables	(1,399,928)	348,916	415,468
Cash generated (used) from operations	7,763,660	3,220,150	9,815,277
Interest paid	(1,946,931)	(1,576,526)	(1,328,420)
Income tax and social contribution paid	(252,479)	(403,614)	(937,557)
Net cash generated (used) by operating activities	5,564,250	1,240,010	7,549,300
Proceeds from the sale of fixed assets and intangible assets	33,140	12,590	95,133
Proceeds from the sale of investments			81,000
Funds received in the investments' capital reduction			2,254
Dividends received	4,822	3,513	41,791
Acquisitions to property, plant and equipment and intangible assets	(2,653,009)	(2,578,558)	(2,635,906)
Other investments			(2,167)
Net cash used in investing activities	(2,615,047)	(2,562,455)	(2,417,895)
Short-term and Long-term debt
Acquired	13,049,459	20,586,103	4,301,626
Payments	(8,734,505)	(17,425,409)	(6,592,197)
Related parties
Acquired loans (payment of loans)			72,880
Lease	(610,392)	(407,320)
Dividends paid	(2,380)	(668,904)	(1,499,900)
Other financial liabilities	(534,456)	499,999
Cash generated (used) in financing activities	3,167,726	2,584,469	(3,717,591)
Exchange variation on cash of foreign subsidiaries	1,054,845	(59,659)	(309,941)
Increase (decrease) in cash and cash equivalents	7,171,774	1,202,365	1,103,873
Cash and cash equivalents at the beginning of the year	5,786,645	4,584,280	3,480,407
Cash and cash equivalents at the end of the year	12,958,419	5,786,645	4,584,280
Increase in cash and cash equivalents	7,171,774	1,202,365	1,103,873
Braskem Idesa Consolidated [member]
Disclosure of subsidiaries [line items]
(Loss) profit before income tax and social contribution	(1,826,811)	(559,877)	162,500
Adjustments for reconciliation of profit (loss)
Depreciation and amortization	1,114,439	952,916	810,581
Interest and monetary and exchange variations, net	1,921,975	1,062,843	1,344,888
Loss (reversals) for impairment of trade accounts receivable		379	3,200
Adjustments for reconciliation of profit	1,209,603	1,456,261	2,321,169
Changes in operating working capital
Trade accounts receivable	(152,971)	325,820	(7,348)
Inventories	56,958	42,581	(199,672)
Taxes recoverable	(52,357)	(20,798)	(46,395)
Prepaid expenses	465,812	117,183	(38,112)
Other receivables	352,590	(30,938)	(236,392)
Trade payables	137,895	(156,138)	209,077
Taxes payable	(515,430)	(84,484)	(149,026)
Advances from customers	(25,776)	21,776	18,665
Sundry provisions	13,560	10,971
Other payables	33,810	13,287	417,759
Cash generated (used) from operations	1,523,694	1,695,521	2,289,725
Interest paid	(789,890)	(661,919)	(588,381)
Income tax and social contribution paid	(5,063)	(8,337)	(274)
Net cash generated (used) by operating activities	728,741	1,025,265	1,701,070
Acquisitions to property, plant and equipment and intangible assets	(106,780)	(103,964)	(70,422)
Net cash used in investing activities	(106,780)	(103,964)	(70,422)
Braskem Idesa borrowings
Acquired		3,497,622
Payments	(905,210)	(4,398,453)	(812,929)
Related parties
Acquired loans (payment of loans)	(37,618)		(72,880)
Lease	(51,676)	(46,870)
Cash generated (used) in financing activities	(994,504)	(947,701)	(885,809)
Exchange variation on cash of foreign subsidiaries	259,741	80,278	(76,168)
Increase (decrease) in cash and cash equivalents	(112,802)	53,878	668,871
Cash and cash equivalents at the beginning of the year	1,017,235	963,357	294,686
Cash and cash equivalents at the end of the year	904,433	1,017,235	963,357
Increase in cash and cash equivalents	(112,802)	53,878	668,871
Eliminations [member]
Disclosure of subsidiaries [line items]
(Loss) profit before income tax and social contribution	1,076,174	358,197	(39,441)
Adjustments for reconciliation of profit (loss)
Depreciation and amortization	(61,967)	(52,832)	(48,982)
Results from equity investments	(1,007,524)	(336,645)	77,709
Interest and monetary and exchange variations, net	(6,683)	31,280	10,714
Changes in operating working capital
Trade accounts receivable	212,874	(107,950)	(20,917)
Trade payables	R$ 212874	R$ 107950	R$ 20917

11 Investments (Details Narrati

11 Investments (Details Narrative) - Braskem idsea [member]	12 Months Ended
	Dec. 31, 2020
Disclosure of subsidiaries [line items]
Loan payable, maturity	December 2029
Proportion of ownership interest	7.00%

12 Property, plant and equipm_3

12 Property, plant and equipment (Details) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Cost			R$ 57190786
Accumulated depreciation, amortization and depletion			(25,430,896)
Beginning balance		R$ 32315181	31,759,890
Acquisitions		2,674,315	2,724,264
Capitalized financial charges		252,427	198,201
Foreign currency translation adjustment		4,036,985	1,085,263
Cost		5,395,660	1,354,929
Depreciation		(1,358,675)	(269,666)
Transfers to inventory		22,806	(50,562)
Transfers to intangible		(40,992)	(6,433)
Cost		(40,960)	(6,433)
Depreciation		(32)
Disposals		(26,975)	(235,546)
Cost		(363,664)	(432,214)
Depreciation		336,689	196,668
Depreciation and amortization		(3,304,598)	(3,061,901)
Transfers to right of use of assets			(97,995)
Cost			(125,497)
Depreciation			27,502
Net book value		35,929,149	32,845,153
Cost		68,794,058	60,853,474
Accumulated depreciation		(32,864,909)	(28,538,293)
Ending balance		35,929,149	32,315,181
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Cost			602,299
Beginning balance		613,807	602,299
Foreign currency translation adjustment		69,244	11,508
Cost		69,244	11,508
Disposals		(20)
Cost		(20)
Net book value		683,031	613,807
Cost		683,031	613,807
Ending balance		683,031	613,807
Buildings and Improvements [member]
Disclosure of detailed information about property, plant and equipment [line items]
Cost			6,676,549
Accumulated depreciation, amortization and depletion			(2,026,559)
Beginning balance		4,572,267	4,649,990
Acquisitions		590	1,280
Foreign currency translation adjustment		818,725	289,118
Cost		1,132,817	366,939
Depreciation		(314,092)	(77,821)
Transfers by concluded projects		105,702	21,382
Disposals		(2,358)	(634)
Cost		(22,657)	(1,178)
Depreciation		20,299	544
Depreciation and amortization		(372,687)	(388,869)
Net book value		5,122,239	4,939,108
Cost		8,281,424	7,064,972
Accumulated depreciation		(3,159,185)	(2,492,705)
Ending balance		5,122,239	4,572,267
Machinery, Equipment and Facilities [member]
Disclosure of detailed information about property, plant and equipment [line items]
Cost			43,024,738
Accumulated depreciation, amortization and depletion			(22,238,530)
Beginning balance		19,649,276	20,786,208
Acquisitions		60,130	61,213
Foreign currency translation adjustment		1,984,408	675,400
Cost		2,982,072	860,672
Depreciation		(997,664)	(185,272)
Transfers by concluded projects		6,248,845	884,606
Disposals		(22,652)	(223,514)
Cost		(328,411)	(392,033)
Depreciation		305,759	(168,519)
Depreciation and amortization		(2,787,042)	(2,534,637)
Net book value		25,132,965	21,461,608
Cost		53,401,832	44,439,196
Accumulated depreciation		(28,268,867)	(24,789,920)
Ending balance		25,132,965	19,649,276
Projects and Stoppage in Progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Cost	[1]		5,102,393
Beginning balance	[1]	7,009,473	5,102,393
Acquisitions	[1]	2,609,565	2,658,070
Capitalized financial charges	[1]	252,427	198,201
Foreign currency translation adjustment	[1]	1,136,671	105,701
Cost	[1]	1,136,671	105,701
Transfers by concluded projects	[1]	(6,542,755)	(993,024)
Transfers to inventory	[1]	(53,903)	(47,696)
Transfers to intangible	[1]	(22,373)	(6,433)
Cost	[1]	(22,373)	(6,433)
Disposals	[1]		(7,739)
Cost	[1]		(7,739)
Net book value	[1]	4,389,105	5,208,094
Cost	[1]	4,389,105	7,009,473
Accumulated depreciation
Ending balance	[1]	4,389,105	7,009,473
Other [member]
Disclosure of detailed information about property, plant and equipment [line items]
Cost			1,784,807
Accumulated depreciation, amortization and depletion			(1,165,807)
Beginning balance		470,358	619,000
Acquisitions		4,030	3,701
Foreign currency translation adjustment		27,937	3,536
Cost		74,856	10,109
Depreciation		(46,919)	(6,573)
Transfers by concluded projects		188,208	87,036
Transfers to inventory		76,709	(2,866)
Transfers to intangible		(18,619)
Cost		(18,587)
Depreciation		(32)
Disposals		(1,945)	(3,659)
Cost		(12,576)	(31,264)
Depreciation		10,631	27,605
Depreciation and amortization		(144,869)	(138,395)
Transfers to right of use of assets			(97,995)
Cost			(125,497)
Depreciation			27,502
Net book value		601,809	622,536
Cost		2,038,666	1,726,026
Accumulated depreciation		(1,436,857)	(1,255,668)
Ending balance		R$ 601809	R$ 470358
[1]	On December 31, 2020, the amounts recorded under this item corresponded to overhaul costs with scheduled shutdowns in Brazil and at overseas plants that are either in the preparation phase or ongoing in the amount of R$924,747 (R$1,400,667 in 2019), capitalized financial charges in the amount of R$233,963 (R$419,244 in 2019), inventories of spare parts in the amount of R$405,497 (R$430,418 in 2019), strategic projects ongoing in Brazil in the amount of R$256,873 (R$98,879 in 2019) and in Braskem America in the amount of R$313,080 (R$2,611,034 in 2019). The remainder corresponds mainly to various projects for maintaining the production capacity of plants.

12 Property, plant and equipm_4

12 Property, plant and equipment (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	R$ 35929149	R$ 32315181	R$ 31759890
BRAZIL
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	15,105,253	15,682,081
MEXICO
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	13,632,787	11,826,309
UNITED STATES
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	6,823,655	4,545,974
Germany
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	363,975	258,291
Other [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	R$ 3479	R$ 2526

12 Property, plant and equipm_5

12 Property, plant and equipment (Details Narrative) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Description of property, plant and equipment shutdowns duration		The Company makes shutdowns in regular intervals that vary from two to six years to perform these activities.
Capitalized financial charges		R$ 252427	R$ 198201
Depreciation rate, property, plant and equipment		7.85%	6.47%
Acquisition of property, plant and equipment with payment installments		R$ 160877	R$ 103315
Projects and Stoppage in Progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment preparation phase or ongoing		924,747	1,400,667
Property, plant and equipment capitalized financial charges		233,963	419,244
Property, plant and equipment inventories of spare parts		405,497	430,418
Capitalized financial charges	[1]	252,427	198,201
Projects and Stoppage in Progress [member] | Braskem america [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment preparation phase or ongoing		313,080	2,611,034
Projects and Stoppage in Progress [member] | BRAZIL [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment preparation phase or ongoing		R$ 256873	R$ 98879
[1]	On December 31, 2020, the amounts recorded under this item corresponded to overhaul costs with scheduled shutdowns in Brazil and at overseas plants that are either in the preparation phase or ongoing in the amount of R$924,747 (R$1,400,667 in 2019), capitalized financial charges in the amount of R$233,963 (R$419,244 in 2019), inventories of spare parts in the amount of R$405,497 (R$430,418 in 2019), strategic projects ongoing in Brazil in the amount of R$256,873 (R$98,879 in 2019) and in Braskem America in the amount of R$313,080 (R$2,611,034 in 2019). The remainder corresponds mainly to various projects for maintaining the production capacity of plants.

13 Intangible assets (Details)

13 Intangible assets (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Balance as of beginning	R$ 2762088	R$ 2740982
Acquisitions	40,515	61,526
Foreign currency translation adjustment	59,940	15,661
Cost	102,733	20,275
Amortization	(42,793)	(4,614)
Transfers from property, plant and equipment projects and stoppage in progress	40,992	6,433
Amortization	(74,844)	(62,514)
Balance as of end	2,828,691	2,762,088
Goodwill [member]
Disclosure of detailed information about intangible assets [line items]
Balance as of beginning	2,058,874	2,058,874
Acquisitions
Balance as of end	2,058,874	2,058,874
Brands and patents [member]
Disclosure of detailed information about intangible assets [line items]
Balance as of beginning	251,615	246,297
Acquisitions	1,789	112
Foreign currency translation adjustment	38,409	12,957
Cost	46,311	13,919
Amortization	(7,902)	(962)
Amortization	(6,753)	(7,751)
Balance as of end	R$ 285060	251,615
Average annual rates of amortization	2.96%
Software licenses [member]
Disclosure of detailed information about intangible assets [line items]
Balance as of beginning	R$ 271936	234,132
Acquisitions	38,660	61,414
Foreign currency translation adjustment	21,531	2,704
Cost	56,422	6,356
Amortization	(34,891)	(3,652)
Transfers from property, plant and equipment projects and stoppage in progress	40,992	6,433
Amortization	(46,075)	(32,747)
Balance as of end	R$ 327044	271,936
Average annual rates of amortization	14.50%
Customers and suppliers agreements [member]
Disclosure of detailed information about intangible assets [line items]
Balance as of beginning	R$ 179663	201,679
Acquisitions	66
Amortization	(22,016)	(22,016)
Balance as of end	R$ 157713	R$ 179663
Average annual rates of amortization	6.01%

13 Intangible assets (Details 1

13 Intangible assets (Details 1) R$ in Thousands	Dec. 31, 2020BRL (R$)
Southern Petrochemical Complex [member]
Disclosure of detailed information about intangible assets [line items]
Allocated goodwill	R$ 1390741
Recoverable amount	32,417,808
Book value	4,583,414	[1]
Northeastern Petrochemical Complex [member]
Disclosure of detailed information about intangible assets [line items]
Allocated goodwill	475,780
Recoverable amount	14,846,391
Book value	3,540,498	[1]
Vinyls Unity [member]
Disclosure of detailed information about intangible assets [line items]
Allocated goodwill	192,353
Recoverable amount	2,168,594
Book value	R$ 2073351	[1]
[1]	The book value includes, in addition to goodwill, tangible and intangible assets with defined useful lives and the working capital.

13 Intangible assets (Details 2

13 Intangible assets (Details 2) R$ in Thousands	Dec. 31, 2020BRL (R$)
Southern Petrochemical Complex [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate	R$ 30218367
Perpetuity	31,168,593
Northeastern Petrochemical Complex [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate	13,745,276
Perpetuity	14,209,808
Vinyls Unity [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate	1,930,200
Perpetuity	R$ 2029886

13 Intangible assets (Details 3

13 Intangible assets (Details 3) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Intangible assets	R$ 2828691	R$ 2762088
BRAZIL
Disclosure of detailed information about intangible assets [line items]
Intangible assets	2,517,470	2,521,941
MEXICO
Disclosure of detailed information about intangible assets [line items]
Intangible assets	259,822	193,741
UNITED STATES
Disclosure of detailed information about intangible assets [line items]
Intangible assets	25,156	24,313
Germany
Disclosure of detailed information about intangible assets [line items]
Intangible assets	26,211	22,077
Other [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	R$ 32	R$ 16

13 Intangible assets (Details N

13 Intangible assets (Details Narrative)	12 Months Ended
	Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]
Inflation rate for perpetuity	2.76%
Brands And Patents [member]
Disclosure of detailed information about intangible assets [line items]
Description of intangible assets with indefinite useful life	Between 10 and 20 years.
Customers and suppliers agreements [member]
Disclosure of detailed information about intangible assets [line items]
Description of intangible assets with indefinite useful life	Between 14 and 28 years.
Software licenses [member]
Disclosure of detailed information about intangible assets [line items]
Description of intangible assets with indefinite useful life	Between 5 and 10 years.
Weighted Average Cost Of Capital [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	9.99%

14 Right-of-use assets and le_3

14 Right-of-use assets and lease Liability (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	R$ 2605654
Transfer of fixed assets		R$ 97995
Initial Adoption		2,314,240
Acquisitions	826,101	759,790
Depreciation	(740,176)	(500,819)
Disposal	(38,488)	(122,488)
Foreign currency translation adjustment	249,304	56,936
Right-of-use assets, ending balance	2,902,395	2,605,654
Buildings and Constructions [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	212,170
Initial Adoption		207,524
Acquisitions	65,176	153,771
Depreciation	(54,712)	(27,759)
Disposal		(122,488)
Foreign currency translation adjustment	37,262	1,122
Right-of-use assets, ending balance	259,896	212,170
IT Equipment [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	12,523
Transfer of fixed assets		2,726
Initial Adoption		4,932
Acquisitions	9,341	6,179
Depreciation	(5,499)	(1,446)
Foreign currency translation adjustment	334	132
Right-of-use assets, ending balance	16,699	12,523
Machinery and Equipment [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	743,248
Transfer of fixed assets		7,956
Initial Adoption		526,318
Acquisitions	227,690	344,928
Depreciation	(198,441)	(136,615)
Disposal	(25,801)
Foreign currency translation adjustment	3,032	661
Right-of-use assets, ending balance	749,728	743,248
Ships [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	865,387
Initial Adoption		906,495
Acquisitions	258,193	150,670
Depreciation	(286,905)	(191,778)
Disposal	(12,687)
Foreign currency translation adjustment	10,860
Right-of-use assets, ending balance	834,848	865,387
Rail Cars [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	746,040
Transfer of fixed assets		87,313
Initial Adoption		633,492
Acquisitions	244,199	103,169
Depreciation	(180,146)	(132,728)
Foreign currency translation adjustment	197,243	54,794
Right-of-use assets, ending balance	1,007,336	746,040
Vehicles [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Right-of-use assets, beginning balance	26,286
Initial Adoption		35,479
Acquisitions	21,502	1,073
Depreciation	(14,473)	(10,493)
Foreign currency translation adjustment	573	227
Right-of-use assets, ending balance	R$ 33888	R$ 26286

14 Right-of-use assets and le_4

14 Right-of-use assets and lease Liability (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Right-of-use Assets And Lease Liability
Balance at beginning, lease liability	R$ 2676896	R$ 100557
Initial adoption IFRS 16		2,191,908
Balance of Initial adoption IFRS 16		2,292,465
Acquired	826,101	911,619
Disposals	(38,488)	(122,488)
Interests and monetary and exchange variations, net	327,135	121,061
Currancy translation adjustments	267,493	56,805
Payments	(662,068)	(454,190)
Interest paid	(189,183)	(128,376)
Balance at ending, lease liability	3,207,886	2,676,896
Current liability			R$ 895109
Non-current liability			2,312,777
Total	R$ 2676896	R$ 100557	R$ 3207886

14 Right-of-use assets and le_5

14 Right-of-use assets and lease Liability (Details 2) R$ in Thousands	Dec. 31, 2020BRL (R$)
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Total	R$ 3480792
2021 [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Total	870,587
2022 [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Total	641,313
2023 [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Total	494,331
2024 [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Total	403,793
2025+ [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Total	R$ 1070768

14 Right-of-use assets and Le_6

14 Right-of-use assets and Lease Liability (Details Narrative) R$ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2020BRL (R$)	Dec. 31, 2019USD ($)	Dec. 31, 2019BRL (R$)
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Low-value leases expense		R$ 981		R$ 1070
Contractual payments		62,256		50,622
Non-cash investing and financing activity		R$ 787613		R$ 580055
Weighted average incremental rate	7.30%	7.30%	5.58%	5.58%
Uninitiated lease arrangements [member]
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Commitments of lease agreement		R$ 828000
US
DisclosureOfRightOfUseAssetsAndLeaseLiabilityLineItems [Line Items]
Contractual payments | $	$ 12,559		$ 12,559

15 Trade account payables (Deta

15 Trade account payables (Details) - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables		R$ 9953548	R$ 9120826
Trade account payables, current		9,946,315	9,116,989
Trade account payables, noncurrent		7,233	3,837
Domestic market [member] | Third Parties [member]
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables		1,077,679	1,006,391
Domestic market [member] | Third parties (drawee risk) [member]
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables	[1]	239,512	74,685
Domestic market [member] | Related parties [member]
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables		97,900	155,980
Domestic market [member] | Related parties (drawee risk) [member]
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables	[1]	546,044
Foreign market [member] | Third Parties [member]
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables	[2]	8,023,032	7,964,536
Present Value Adjustment - Foreign Market [member]
DisclosureOfTradeAccountPayablesLineItems [Line Items]
Trade account payables	[3]	R$ 30619	R$ 80766
[1]	The Company participates in a finance programme under which its suppliers may elect to receive early payment of their invoices from a bank by factoring their receivable from the Company. Under the arrangement there is no change in the instruments issued by the supplier and amount and payment terms are maintained.
[2]	Considers R$4.7 billion (R$6.5 billion in 2019) in raw material purchases due in up to 360 days for which the Company provides letters of credit issued by financial institutions that indicate the suppliers as beneficiaries.
[3]	The rate for calculating the Present Value Adjustment (PVA) applied to the external market payments with terms equal to or longer than 90 days is calculated based on the average rate for lengthening the term of trade payables.

15 Trade account payables (De_2

15 Trade account payables (Details Narrative) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Trade and other payables [abstract]
Amount of raw material purchases	R$ 4700000	R$ 6500000

16 Borrowings (Details)

16 Borrowings (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 41732123	R$ 29016976
Borrowings, current	1,318,931	774,924
Borrowings, noncurrent	40,413,192	28,242,052
Foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,234,330	27,651,467
Borrowings, current	1,206,084	676,831
Borrowings, noncurrent	39,028,246	26,974,636
Foreign currency [member] | Bond [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 34963651	24,583,325
Annual financial charges	Note 16 (b)
Foreign currency [member] | Export Prepayment [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 2207762	863,293
Annual financial charges	Note 16 (c)
Foreign currency [member] | Investments [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 996531	751,376
Annual financial charges	Note 16 (d)
Foreign currency [member] | Other [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 2755200	1,952,667
Annual financial charges	Note 16 (e)
Foreign currency [member] | Transactions costs [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 688814	(499,194)
Local Currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,497,793	1,365,509
Borrowings, current	112,847	98,093
Borrowings, noncurrent	1,384,946	1,267,416
Local Currency [member] | Transactions costs [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	(1,607)	(2,029)
Local Currency [member] | Export Credit Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 402739	405,642
Annual financial charges	100.00 of CDI + 0.70
Local Currency [member] | Commercial Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 545171	554,307
Annual financial charges	100.00 of CDI + 0.85
Local Currency [member] | BNDES [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 1538	19,998
Annual financial charges	4
Local Currency [member] | BNDES [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 490963	270,520
Annual financial charges	IPCA + 6.04
Local Currency [member] | FINEP/FINISA [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 26154	78,776
Annual financial charges	3.59
Local Currency [member] | FINAME [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		324
Annual financial charges	TLP + 6.00
Local Currency [member] | BNB-FNE (fundo vonstitucional de financiamentos do nordeste) [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 5639	5,582
Annual financial charges	IPCA + interest between 2.39 and 2.78
Local Currency [member] | Fundo de Desenvolvimento do Nordeste (FDNE) [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	R$ 27196	32,152
Annual financial charges	6.5
Local Currency [member] | Other [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		R$ 237
Annual financial charges	19.14

16 Borrowings (Details 1)

16 Borrowings (Details 1) - Foreign currency [member] - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Issue amount		R$ 7300000
Outstanding amount		6,582,027
Borrowings		R$ 34963651	R$ 24583325
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		October 2010
Issue amount		R$ 450000
Outstanding amount		R$ 250000
Maturity		no maturity date
Interest (% per year)		7.38%
Borrowings		R$ 1299175	1,025,428
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		July 2011
Issue amount		R$ 500000
Outstanding amount		R$ 500000
Maturity		July 2041
Interest (% per year)		7.13%
Borrowings		R$ 2679603	2,078,372
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		February 2012
Issue amount		R$ 250000
Outstanding amount		R$ 250000
Maturity		no maturity date
Interest (% per year)		7.38%
Borrowings		R$ 1299175	1,025,428
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		May 2012
Issue amount		R$ 500000
Outstanding amount		R$ 286267
Maturity		May 2022
Interest (% per year)		5.38%
Borrowings		R$ 1500304	1,175,799
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		July 2012
Issue amount		R$ 250000
Outstanding amount		R$ 250000
Maturity		July 2041
Interest (% per year)		7.13%
Borrowings		R$ 1339801	1,039,186
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		February 2014
Issue amount		R$ 500000
Outstanding amount		R$ 500000
Maturity		February 2024
Interest (% per year)		6.45%
Borrowings		R$ 2667250	2,068,790
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		May 2014
Issue amount		R$ 250000
Outstanding amount		R$ 250000
Maturity		February 2024
Interest (% per year)		6.45%
Borrowings		R$ 1333625	1,034,395
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		October 2017
Issue amount		R$ 500000
Outstanding amount		R$ 195760
Maturity		January 2023
Interest (% per year)		3.50%
Borrowings		R$ 1034179	847,715
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		October 2017
Issue amount		R$ 1250000
Outstanding amount		R$ 1250000
Maturity		January 2028
Interest (% per year)		4.50%
Borrowings		R$ 6633913	5,145,440
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		November 2019
Issue amount		R$ 1500000
Outstanding amount		R$ 1500000
Maturity		January 2030
Interest (% per year)		4.50%
Borrowings		R$ 7941207	6,090,640
Bonds [member]
Disclosure of detailed information about borrowings [line items]
Issue date		November 2019
Issue amount		R$ 750000
Outstanding amount		R$ 750000
Maturity		January 2050
Interest (% per year)		5.88%
Borrowings		R$ 3992933	R$ 3052132
Bond [member]
Disclosure of detailed information about borrowings [line items]
Issue date	[1]	Jul-20
Issue amount		R$ 600000
Outstanding amount	[1]	R$ 600000
Maturity		Jan-81
Interest (% per year)	[1]	8.50%
Borrowings	[1]	R$ 3242486
[1]	This Bond is recorded as a financial liability. According to the specific methodology adopted by some rating agencies, only for the purposes of calculating leverage, the referred bond is classified as a hybrid capital instrument.

16 Borrowings (Details 2)

16 Borrowings (Details 2) - Foreign currency [member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Export prepayment [member]
Disclosure of detailed information about borrowings [line items]
Issue date	September 2017
Initial amount of the transaction	R$ 135000
Outstanding amount	R$ 97500
Maturity	March 2027
Charges (% per year)	US dollar exchange variation + semiannual Libor + 1.61
Borrowings	R$ 509141	R$ 457712
Export prepayment [member]
Disclosure of detailed information about borrowings [line items]
Issue date	October 2019
Initial amount of the transaction	R$ 100000
Outstanding amount	R$ 100000
Maturity	October 2024
Charges (% per year)	US dollar exchange variation + quarterly Libor + 1.75
Borrowings	R$ 521469	405,581
Export prepayment [member]
Disclosure of detailed information about borrowings [line items]
Issue date	Aug-2020
Initial amount of the transaction	R$ 225000
Outstanding amount	R$ 225000
Maturity	Feb-2031
Charges (% per year)	US dollar exchange variation + semiannual Libor + 1.70
Borrowings	R$ 1177152
Initial amount of the transaction	460,000
Outstanding amount	422,500
Borrowings	R$ 2207762	R$ 863293

16 Borrowings (Details 3)

16 Borrowings (Details 3) - Foreign currency [member] - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
RPR [member]
Disclosure of detailed information about borrowings [line items]
Issue date		July 2018
Initial amount of the transaction		R$ 203742
Outstanding amount	[1]	R$ 191757
Maturity	[1]	Dec-2028
Charges (% per year)	[1]	Us dollar exchange variation + semianual Libor + 0.65
Borrowings	[1]	R$ 996531	R$ 751376
Initial amount of the transaction		203,742
Outstanding amount		191,757
Borrowings		R$ 996531	R$ 751376
[1]	US$130,650 released in July 2018, US$13,677 in September 2018, US$13,823 in December 2018, US$7,688 in March 2019, US$6,231 in June 2019, US$4,549 in September 2019, US$2,780 in December 2019, US$4,158 in March 2020, US$5,738 in June 2020, US$5,068 in September 2020, US$2,380 in December 2020 and capitalized interest in the amount of US$7,000.

16 Borrowings (Details 4)

16 Borrowings (Details 4) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Foreign currency [member] | SACE [member]
Disclosure of detailed information about borrowings [line items]
Issue date	[1]	Nov-2018
Initial amount of the transaction		R$ 295125
Outstanding amount	[1]	R$ 236100
Maturity	[1]	Nov-2028
Charges (% per year)	[1]	Us dollar exchange variation + semianual Libor + 0.90
Borrowings		R$ 1228285	R$ 1073526
Foreign currency [member] | SACE [member]
Disclosure of detailed information about borrowings [line items]
Issue date	[1]	Dec-2019
Initial amount of the transaction		R$ 150000
Outstanding amount	[1]	R$ 135000
Maturity	[1]	Dec-2029
Charges (% per year)	[1]	Us dollar exchange variation + semianual Libor + 0.90
Borrowings		R$ 702027	605,448
Foreign currency [member] | MONFORTE [member]
Disclosure of detailed information about borrowings [line items]
Issue date	[2]	Apr-2019
Initial amount of the transaction		R$ 72345
Outstanding amount	[2]	R$ 57811
Maturity	[2]	Apr-2026
Charges (% per year)	[2]	Us dollar exchange variation + semianual Libor + 1.00
Borrowings		R$ 300434	273,693
Foreign currency [member] | ING [member]
Disclosure of detailed information about borrowings [line items]
Issue date	[3]	Jan-2020
Initial amount of the transaction		R$ 100000
Outstanding amount	[3]	R$ 100000
Maturity	[3]	Jan-2025
Charges (% per year)	[3]	Us dollar exchange variation + semianual Libor + 1.65
Borrowings		R$ 524454
Foreign Currency [member]
Disclosure of detailed information about borrowings [line items]
Initial amount of the transaction		617,470
Outstanding amount		528,911
Borrowings		R$ 2755200	R$ 1952667
[1]	Credit facility contracted by the subsidiary Braskem Netherlands B.V. with guarantee from SACE, an Italian export credit agency.
[2]	Credit facility contracted by Braskem S.A. with a term of 7 years. To consummate this facility, certain assets of the Company's plants were pledged to the financial institution in amount higher than financing.
[3]	Credit facility contracted by the subsidiary Braskem Netherlands B.V. with a term of 5 years.

16 Borrowings (Details 5)

16 Borrowings (Details 5) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	R$ 40413192	R$ 28242052
2021 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent		380,324
2022 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	2,086,460	1,549,976
2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	1,824,477	1,416,730
2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	5,653,432	4,418,409
2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	1,121,748	369,725
2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	580,062	350,320
2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	514,819	297,382
2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	6,986,264	5,314,976
2029 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	217,418	71,326
2030 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	7,951,181	6,068,078
2031 and thereafter [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, noncurrent	R$ 13477331	R$ 8004806

16 Borrowings (Details 6)

16 Borrowings (Details 6) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Disclosure of detailed information about borrowings [line items]
Total debt	R$ 33331
Total guaranteed	R$ 33331
BNDES [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan-21
Total debt	R$ 1538
Total guaranteed	R$ 1538
Guarantees	Mortgage of plants, land and property, pledge of machinery and equipment
FINEP [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul-24
Total debt	R$ 22736
Total guaranteed	R$ 22736
Guarantees	Bank surety
FINISA [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec-2023
Total debt	R$ 3418
Total guaranteed	R$ 3418
Guarantees	Bank surety
BNB-FNE (fundo vonstitucional de financiamentos do nordeste) [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun-2027
Total debt	R$ 5639
Total guaranteed	R$ 5639
Guarantees	Bank surety and pledge of reserve liquidity fund.

16 Borrowings (Details Narrativ

16 Borrowings (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 31, 2018
Disclosure of detailed information about borrowings [line items]
Principal amount	R$ 2170000
Description of collateral	Braskem S.A. has fully and unconditionally guaranteed the debt securities issued by Braskem Finance, Braskem America Finance and Braskem Netherlands Finance B.V. 100-percent-owned subsidiaries of Braskem.
Capitalized interest amount	R$ 7000
UNITED STATES
Disclosure of detailed information about borrowings [line items]
Principal amount	2,380	R$ 5068	R$ 5738	R$ 4158	R$ 2780	R$ 4549	R$ 6231	R$ 7688	R$ 13823	R$ 13677	R$ 130650
UNITED STATES | Braskem america [member]
Disclosure of detailed information about borrowings [line items]
Principal amount	R$ 11693300
Description of collateral	Secured by Euler Hermes, a German export credit agency, which will be used to finance a portion of the investment in the new PP plant located in La Porte, Texas.
UNITED STATES | Braskem america [member] | US
Disclosure of detailed information about borrowings [line items]
Principal amount	R$ 225000
ING [member]
Disclosure of detailed information about borrowings [line items]
Credit facility contracted terms	5 years
MONFORTE [member]
Disclosure of detailed information about borrowings [line items]
Credit facility contracted terms	7 years

17 Braskem Idesa Financing (Det

17 Braskem Idesa Financing (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Braskem Idesa borrowings	R$ 12059238	R$ 9981726
Braskem Idesa borrowings, current	7,660,128	744,408
Braskem Idesa borrowings, non current	4,399,110	9,237,318
Project finance I [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Principal amount	700,000
Outstanding amount	R$ 467519
Maturity	February 2027
Charges (% per year)	US dollar exchange variation + quarterly Libor + 3.25
Braskem Idesa borrowings	R$ 2444515	2,149,002
Project finance II [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Principal amount	210,000
Outstanding amount	R$ 131591
Maturity	February 2027
Charges (% per year)	US dollar exchange variation + 6.17
Braskem Idesa borrowings	R$ 690311	608,260
Project finance III [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Principal amount	600,000
Outstanding amount	R$ 409870
Maturity	February 2029
Charges (% per year)	US dollar exchange variation + 4.33
Braskem Idesa borrowings	R$ 2145326	1,849,896
Project finance IV [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Principal amount	660,000
Outstanding amount	R$ 462463
Maturity	February 2029
Charges (% per year)	US dollar exchange variation + quarterly Libor + 3.88
Braskem Idesa borrowings	R$ 2419920	2,078,545
Bond [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Principal amount	900,000
Outstanding amount	R$ 900000
Maturity	November 2029
Charges (% per year)	Us dollar exchange variation + 7.45
Braskem Idesa borrowings	R$ 4729587	3,640,381
Transactions costs [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Braskem Idesa borrowings	(370,421)	(344,358)
Project finance [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Principal amount	2,170,000
Outstanding amount	1,471,443
Braskem Idesa borrowings	R$ 7700072	R$ 6685703

17 Braskem Idesa Financing (D_2

17 Braskem Idesa Financing (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations	R$ 12059238	R$ 9981726
Original contractual maturities	12,059,238	9,981,726
2020 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		744,408
Original contractual maturities		744,408
2021 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations	7,660,128	800,752
Original contractual maturities	1,121,482	800,752
2022 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		699,090
Original contractual maturities	907,343	699,090
2023 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		892,568
Original contractual maturities	1,157,584	892,568
2024 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		978,479
Original contractual maturities	1,268,619	978,479
2025 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		883,333
Original contractual maturities	1,145,377	883,333
2026 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		743,566
Original contractual maturities	964,410	743,566
2027 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		329,718
Original contractual maturities	428,750	329,718
2028 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations		257,117
Original contractual maturities	334,753	257,117
2029 [member]
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
With breach of contratual obligations	4,399,110	3,652,695
Original contractual maturities	R$ 4730920	R$ 3652695

17 Braskem Idesa financing (D_3

17 Braskem Idesa financing (Details Narrative) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Braskem Idesa Borrowings non current	R$ 6538646
BRL
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Transaction costs	1,000,000	R$ 1100000
US
DisclosureOfDetailedInformationAboutBraskemIdesaFinancingLineItems [Line Items]
Transaction costs	R$ 194000	R$ 208000

18 Debentures (Details)

18 Debentures (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures	R$ 236115	R$ 274567
Debentures, current	54,436	46,666
Debentures, noncurrent	R$ 181679	227,901
Debentures [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Issue date	March 2013
Maturity	March 2025
Annual financial charges (%)	IPCA + 6%
Debentures	R$ 177009	202,992
Debentures [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Issue date	September 2013
Maturity	September 2025
Annual financial charges (%)	126.5% of CDI
Debentures	R$ 59106	R$ 71575

18 Debentures (Details 1)

18 Debentures (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures, noncurrent	R$ 181679	R$ 227901
2021 [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures, noncurrent		52,078
2022 [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures, noncurrent	53,406	52,100
2023 [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures, noncurrent	53,417	52,125
2024 [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures, noncurrent	53,443	52,153
2025 [member]
DisclosureOfDetailedInformationAboutDebenturesLineItems [Line Items]
Debentures, noncurrent	R$ 21413	R$ 19445

19 Reconciliation of borrowin_2

19 Reconciliation of borrowing activities in the statement of cash flow (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Borrowings [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	R$ 29016976
Acquired	13,049,459
Payments	(8,699,033)
Cash used in financing activities	4,350,426
Other changes
Interest paid	(1,754,199)
Interest and monetary and exchange variations, net	4,664,034
Currency translation adjustments	5,454,886
Total other changes	8,364,721
Ending balance	41,732,123
Debentures [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	274,567
Payments	(35,472)
Cash used in financing activities	(35,472)
Other changes
Interest paid	24,945
Interest and monetary and exchange variations, net	21,965
Total other changes	(2,980)
Ending balance	236,115
Total borrowings and debentures [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	29,291,543
Acquired	13,049,459
Payments	(8,734,505)
Cash used in financing activities	4,314,954
Other changes
Interest paid	(1,779,144)
Interest and monetary and exchange variations, net	4,685,999
Currency translation adjustments	5,454,886
Total other changes	8,361,741
Ending balance	41,968,238
Braskem idesa financing [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	9,981,726
Payments	905,210
Cash used in financing activities	(905,210)
Other changes
Interest paid	754,829
Interest and monetary and exchange variations, net	1,044,110
Currency translation adjustments	2,693,441
Total other changes	2,982,722
Ending balance	12,059,238
Loan to non-controlling shareholders of braskem idesa [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	2,395,887
Payments	(37,618)
Cash used in financing activities	(37,618)
Other changes
Interest paid	(13,665)
Interest and monetary and exchange variations, net	188,074
VAT on loan	68,149
Currency translation adjustments	621,666
Total other changes	864,224
Ending balance	3,222,493
Lease [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	2,676,896
Payments	(662,068)
Cash used in financing activities	(662,068)
Other changes
Interest paid	(189,183)
Interest and monetary and exchange variations, net	327,135
Acquired	826,101
Disposal	(38,488)
Currency translation adjustments	267,493
Total other changes	1,193,058
Ending balance	3,207,886
Dividends [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	6,502
Payments	(2,380)
Cash used in financing activities	(2,380)
Other changes
Additional dividends of subsidiary	2,450
Prescribed dividends	(1,110)
Other	(6)
Total other changes	1,334
Ending balance	5,456
Other financial liabilities [member]
DisclosureOfFinancingActivitiesInStatementOfCashFlowLineItems [Line Items]
Beginning balance	516,933
Payments	(534,456)
Cash used in financing activities	(534,456)
Other changes
Interest and monetary and exchange variations, net	17,523
Total other changes	R$ 17523

20 Financial instruments (Detai

20 Financial instruments (Details) - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Other financial liabilities [member] | Amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities	[1]		R$ 516933
Fair value financial liabilities	[1]		516,933
Trade payables [member] | Amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		R$ 9953548	9,120,826
Fair value financial liabilities		9,953,548	9,120,826
Borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		42,422,544	29,518,199
Fair value financial liabilities		46,118,050	30,084,745
Braskem idesa borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		12,429,659	10,326,084
Fair value financial liabilities		15,897,373	10,009,312
Loan to non-controlling shareholder of braskem idesa [member | Amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		3,222,493	2,395,887
Fair value financial liabilities		3,222,493	2,395,887
Leniency agreement [member] | Amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		1,474,350	1,742,268
Fair value financial liabilities		1,474,350	1,742,268
Level 2 [member] | Borrowings [member] | Amortized cost [member] | Foreign currency - other borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		5,959,493	3,567,336
Fair value financial liabilities		6,371,070	3,218,410
Level 2 [member] | Borrowings [member] | Amortized cost [member] | Local Currency [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		1,499,400	1,367,538
Fair value financial liabilities		2,591,920	1,075,803
Level 2 [member] | Braskem idesa borrowings [member] | Amortized cost [member] | Project finance [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		7,700,072	6,685,703
Fair value financial liabilities		11,486,114	6,116,434
Level 2 [member] | Debentures [member] | Amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		236,115	274,567
Fair value financial liabilities		248,778	293,282
Level 1 [member] | Borrowings [member] | Amortized cost [member] | Foreign currency - bond [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		34,963,651	24,583,325
Fair value financial liabilities		37,155,060	25,790,532
Level 1 [member] | Braskem idesa borrowings [member] | Amortized cost [member] | Bond [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial liabilities		4,729,587	3,640,381
Fair value financial liabilities		4,411,259	3,892,878
Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		13,862,852	6,803,880
Fair value financial assets		13,862,852	6,803,880
Cash and cash equivalents [member] | Cash and banks [member] | Amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		1,946,963	2,303,231
Fair value financial assets		1,946,963	2,303,231
Cash and cash equivalents [member] | Financial investments in brazil [member] | Fair Value Through Profit or Loss [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		8,271,312	1,963,185
Fair value financial assets		8,271,312	1,963,185
Cash and cash equivalents [member] | Financial Investments Abroad [member] | Fair Value Through Profit or Loss [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		3,644,577	2,537,464
Fair value financial assets		3,644,577	2,537,464
Financial investments [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		3,642,791	1,697,212
Fair value financial assets		3,642,791	1,697,212
Financial investments [member] | Letras financeiras do tesouro - LFT [member] | Fair Value Through Profit or Loss [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		2,163,042	1,588,426
Fair value financial assets		2,163,042	1,588,426
Financial investments [member] | Time Deposit Investments [member] | Amortized Cost [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		53,941	38,759
Fair value financial assets		53,941	38,759
Financial investments [member] | Other [member] | Fair Value Through Profit or Loss [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		1,425,808	70,027
Fair value financial assets		1,425,808	70,027
Trade accounts receivables [member] | Fair Value Through Profit or Loss [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		78,116	60,403
Fair value financial assets		78,116	60,403
Trade accounts receivables [member] | Amortized Cost [member]
Disclosure of detailed information about financial instruments [line items]
Book value financial assets		4,677,092	2,246,248
Fair value financial assets		R$ 4677092	R$ 2246248
[1]	Amount received due to the assignment of an agreement to supply ethylene to the client, without recourse, settled in 2020.

20 Financial instruments (Det_2

20 Financial instruments (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivatives
Current assets	R$ 33769	R$ 4712
Non-current assets	(34,091)	(17,877)
Current liabilities	592,251	49,251
Non-current liabilities	558,913	169,513
Total	1,083,304	R$ 196175
Non-hedge accounting transactions [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	25,900
Change in fair value	219,365
Financial settlement	(29,177)
Ending balance	216,088
Non-hedge accounting transactions [member] | Exchange swap [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	296
Change in fair value	540
Financial settlement	(839)
Ending balance	(3)
Non-hedge accounting transactions [member] | NCE swap [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	25,604
Change in fair value	129,297
Financial settlement	(9,757)
Ending balance	145,144
Non-hedge accounting transactions [member] | Swap ACC [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Change in fair value	16,259
Financial settlement	(16,259)
Non-hedge accounting transactions [member] | Swap C3/PGP [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Change in fair value	66,223
Financial settlement	(2,322)
Ending balance	63,901
Non-hedge accounting transactions [member] | Swap Nafta/Gasolina [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Change in fair value	7,046
Ending balance	7,046
Hedge accounting transactions [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	170,275
Change in fair value	1,228,880
Financial settlement	(531,939)
Ending balance	867,216
Extrinsic value	(43,948)
Accumulated OCI (equity)	(100,853)
Fair value	(978,331)
Hedge accounting transactions [member] | Dollar call and put options [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	(2,298)
Change in fair value	594,780
Financial settlement	(447,681)
Ending balance	144,801
Extrinsic value	(43,948)
Accumulated OCI (equity)	(100,853)
Fair value	(144,801)
Hedge accounting transactions [member] | Dollar swap [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	38,620
Change in fair value	12,091
Financial settlement	(50,711)
Hedge accounting transactions [member] | Interest rate swaps [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	26,707
Change in fair value	162,615
Financial settlement	(33,547)
Ending balance	155,775
Fair value	(266,889)
Hedge accounting transactions [member] | Dollar swap CDI [member] | Level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	107,246
Change in fair value	459,394
Ending balance	566,640
Fair value	R$ 566641

20 Financial instruments (Det_3

20 Financial instruments (Details 2) - Dollar call and put options [member] R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Disclosure of detailed information about financial instruments [line items]
Extrinsic value	R$ 43948
Intrinsic value	(100,853)
Accumulated OCI (equity)	R$ 144801

20 Financial instruments (Det_4

20 Financial instruments (Details 3) - Braskem idsea [member] R$ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2020BRL (R$)	Dec. 31, 2019BRL (R$)
Disclosure of detailed information about financial instruments [line items]
Nominal value | $	$ 616,519
Fair value		R$ 155775	R$ 26707
Derivatives
Current liabilities		53,838	5,768
Non-current liabilities		101,937	20,939
Total		R$ 155775	26,707
Swap libor I to VI [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value | $	$ 616,519
Hedge (interest rate per year)	1.9825%	1.9825%
Maturity	Aug-2025
Fair value		R$ 155775	R$ 26707

20 Financial instruments (Det_5

20 Financial instruments (Details 4) - US $ in Thousands	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 5,274,854
2021 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	336,000
2023 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	200,000
2024 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	688,854
2025 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	400,000
2028 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	1,250,000
2030 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	800,000
2031 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	800,000
2032 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 800,000

20 Financial instruments (Det_6

20 Financial instruments (Details 5) - US - Future exports [member] $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Designated balance, beginning	$ 5,398,854
Hedge discontinued	(1,086,000)
Realizated discontinued hedge	362,000
Designations	600,000
Designated balance, ending	$ 5,274,854

20 Financial instruments (Det_7

20 Financial instruments (Details 6) - US $ in Thousands	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 5,274,854
2021 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	336,000
2023 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	200,000
2024 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	688,854
2025 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	400,000
2028 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	1,250,000
2030 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	800,000
2031 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	800,000
2032 [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 800,000

20 Financial instruments (Det_8

20 Financial instruments (Details 7) R$ in Thousands, $ in Thousands	Dec. 31, 2020USD ($)Number	Dec. 31, 2020BRL (R$)Number
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		R$ 2194059
US
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 724,000
Hedge discontinued [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	1,617,372
Gross nominal value | R$		R$ 3197383
Hedge discontinued [member] | US | Third to fourth quarter 2021 [member] | Braskem idsea [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 380,000
Conversion rate at inception	2.0017	2.0017
Closing rate	3.9786	3.9786
Gross nominal value | R$		R$ 751222
Hedge discontinued [member] | US | First to fourth quarter 2022 [member] | Braskem idsea [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 719,000
Conversion rate at inception	2.0017	2.0017
Closing rate	3.9786	3.9786
Gross nominal value | R$		R$ 1421391
Hedge discontinued [member] | US | First to third quarter 2023 [member] | Braskem idsea [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 518,372
Conversion rate at inception	2.0017	2.0017
Closing rate	3.9786	3.9786
Gross nominal value | R$		R$ 1024770

20 Financial instruments (Det_9

20 Financial instruments (Details 8) R$ in Thousands, $ in Thousands	Dec. 31, 2020USD ($)Number	Dec. 31, 2020BRL (R$)Number
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		R$ 2194059
First quarter [member]
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		400,047
Second quarter [member]
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		578,657
Third quarter [member]
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		578,657
Fourth quarter [member]
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		R$ 636698
US
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 724,000
US | First quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 181,000
Conversion rate at inception	2.0017	2.0017
Closing rate	4.2119	4.2119
US | Second quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 181,000
Conversion rate at inception	2.0017	2.0017
Closing rate	5.1987	5.1987
US | Third quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 181,000
Conversion rate at inception	2.0017	2.0017
Closing rate	5.1987	5.1987
US | Fourth quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value | $	$ 181,000
Conversion rate at inception	2.0017	2.0017
Closing rate	5.5194	5.5194

20 Financial instruments (De_10

20 Financial instruments (Details 9) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Disclosure of detailed information about financial instruments [line items]
Beginning balance	R$ 5549389
Exchange variation recorded in the period on OCI / IR and CSL	(4,541,581)
Exchange variation transferred to profit or loss / IR and CSL	1,448,079
Ending balance	(8,642,891)
Exchange variation [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	(8,408,164)
Exchange variation recorded in the period on OCI / IR and CSL	(6,881,183)
Exchange variation transferred to profit or loss / IR and CSL	2,194,059
Ending balance	(13,095,288)
IR and CSL [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	2,858,775
Exchange variation recorded in the period on OCI / IR and CSL	2,339,602
Exchange variation transferred to profit or loss / IR and CSL	(745,980)
Ending balance	R$ 4452397

20 Financial instruments (De_11

20 Financial instruments (Details 10) - US $ in Thousands	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 716,000
First quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	150,000
Second quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	186,000
Third quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	180,000
Fourth quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 200,000

20 Financial instruments (De_12

20 Financial instruments (Details 11) - US $ in Thousands	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Nominal value	$ 2,371,443
2021 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	208,946
2022 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	183,318
2023 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	230,992
2024 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	251,884
2025 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	227,775
2026 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	192,651
2027 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	89,516
2028 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	71,341
2029 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	15,020
2030 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	225,000
2031 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	225,000
2032 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	225,000
2033 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value	$ 225,000

20 Financial instruments (De_13

20 Financial instruments (Details 12) - US $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Beginning balance	$ 2,552,407
Discontinued hedge	(267,577)
Rebalanced hedge	86,613
Ending balance	$ 2,371,443

20 Financial instruments (De_14

20 Financial instruments (Details 13) - US R$ in Thousands, $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2020BRL (R$)	Dec. 31, 2019USD ($)
Disclosure of detailed information about financial instruments [line items]
Nominal value | $	$ 2,371,443		$ 2,552,407
2021 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		R$ 208946
2022 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		183,318
2023 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		230,992
2024 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		251,884
2025 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		227,775
2026 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		192,651
2027 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		89,516
2028 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		71,341
2029 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		15,020
2030 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		225,000
2031 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		225,000
2032 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		225,000
2033 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal value		R$ 225000

20 Financial instruments (De_15

20 Financial instruments (Details 14) - Braskem idsea [member] R$ in Thousands, $ in Thousands, $ in Thousands	Dec. 31, 2020USD ($)Number	Dec. 31, 2020BRL (R$)Number	Dec. 31, 2020MXN ($)Number
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		R$ 951371
US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 752,870
MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 4,458,158
Hedge discontinued in may 16, 2016 [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	13.4541	13.4541	13.4541
Closing rate | Number	17.9915	17.9915	17.9915
Gross nominal value | R$		R$ 10160
Hedge discontinued in may 16, 2016 [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 10,493
Hedge discontinued in may 16, 2016 [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 47,611
Hedge discontinued in december 2, 2019 [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	13.6664	13.6664	13.6664
Closing rate | Number	19.6113	19.6113	19.6113
Gross nominal value | R$		R$ 904317
Hedge discontinued in december 2, 2019 [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 712,823
Hedge discontinued in december 2, 2019 [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 4,237,661
Hedge discontinued in december 10, 2019 [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	13.4541	13.4541	13.4541
Closing rate | Number	19.3247	19.3247	19.3247
Gross nominal value | R$		R$ 36005
Hedge discontinued in december 10, 2019 [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 28,740
Hedge discontinued in december 10, 2019 [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 168,721
Hedge discontinued in february 18, 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	13.4541	13.4541	13.4541
Closing rate | Number	18.5712	18.5712	18.5712
Gross nominal value | R$		R$ 889
Hedge discontinued in february 18, 2020 [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 814
Hedge discontinued in february 18, 2020 [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 4,165

20 Financial instruments (De_16

20 Financial instruments (Details 15) - Braskem idsea [member] R$ in Thousands, $ in Thousands, $ in Thousands	Dec. 31, 2020USD ($)Number	Dec. 31, 2020BRL (R$)Number	Dec. 31, 2020MXN ($)Number
Disclosure of detailed information about financial instruments [line items]
Gross nominal value | R$		R$ 471728
US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 266,691
MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 1,912,560
First quarter [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	14	14	14
Closing rate | Number	19	19	19
Gross nominal value | R$		R$ 75162
First quarter [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 61,369
First quarter [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 325,759
Second quarter [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	14	14	14
Closing rate | Number	22	22	22
Gross nominal value | R$		R$ 139205
Second quarter [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 65,612
Second quarter [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 578,744
Third quarter [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	14	14	14
Closing rate | Number	21	21	21
Gross nominal value | R$		R$ 133798
Third quarter [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 69,855
Third quarter [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 543,535
Fourth quarter [member]
Disclosure of detailed information about financial instruments [line items]
Conversion rate at inception | Number	14	14	14
Closing rate | Number	20	20	20
Gross nominal value | R$		R$ 123563
Fourth quarter [member] | US
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 69,855
Fourth quarter [member] | MXN
Disclosure of detailed information about financial instruments [line items]
Total nominal value			$ 464,522

20 Financial instruments (De_17

20 Financial instruments (Details 16) - Braskem idsea [member] R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Disclosure of detailed information about financial instruments [line items]
Beginning balance	R$ 1791571
Exchange variation recorded in the period on OCI / IR	(311,795)
Exchange variation transferred to profit or loss / IR	330,210
Ending balance	(1,773,156)
Exchange variation [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	(2,560,436)
Exchange variation recorded in the period on OCI / IR	(445,427)
Exchange variation transferred to profit or loss / IR	471,728
Ending balance	(2,534,135)
Income tax [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	768,865
Exchange variation recorded in the period on OCI / IR	133,632
Exchange variation transferred to profit or loss / IR	(141,518)
Ending balance	R$ 760979

20 Financial instruments (De_18

20 Financial instruments (Details 17) - US $ in Thousands	Dec. 31, 2020USD ($)
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 303,391
First quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	69,855
Second quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	75,848
Third quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	77,094
Fourth quarter [member]
Disclosure of detailed information about financial instruments [line items]
Total nominal value	$ 80,594

20 Financial instruments (De_19

20 Financial instruments (Details 18)		Dec. 31, 2020	Dec. 31, 2019
Stages 1 minimum risk [member]
Disclosure of detailed information about financial instruments [line items]
Credit rating		67.52%	74.23%
Stages 2 low risk [member]
Disclosure of detailed information about financial instruments [line items]
Credit rating		20.08%	14.89%
Stages 3 moderate risk [member]
Disclosure of detailed information about financial instruments [line items]
Credit rating		10.43%	7.82%
Stages 4 high risk [member]
Disclosure of detailed information about financial instruments [line items]
Credit rating		1.10%	1.06%
Stages 5 very high risk [member]
Disclosure of detailed information about financial instruments [line items]
Credit rating	[1]	0.86%	1.99%
[1]	Most clients in this group are inactive and the respective accounts are in the process of collection actions in the courts. Clients in this group that are still active buy from Braskem and pay in advance.

20 Financial instruments (De_20

20 Financial instruments (Details 19)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Domestic market [member]
Disclosure of detailed information about financial instruments [line items]
Default indicators	0.05%	0.05%	0.08%
External market [member]
Disclosure of detailed information about financial instruments [line items]
Default indicators	0.14%	0.17%	0.45%

20 Financial instruments (De_21

20 Financial instruments (Details 20) - BRL (R$) R$ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		R$ 17451081	R$ 8496158
Financial assets without risk assessment		54,562	4,934
Financial assets		17,505,643	8,501,092
AAA [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		13,639,273	5,475,075
AA+ [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		412,612	109,933
AA [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		735,755
AA- [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		199,405	1,458,424
A+ [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		1,336,334	159,848
A [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		53,941	121,132
A- [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		91,487	1,171,746
BBB+ [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		982,225
BBB [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets with risk assessment		49
Other financial assets with no risk assessment [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets without risk assessment	[1]	R$ 54562	R$ 4934
[1]	Investments approved by the Management of the Company, in accordance with the financial policy.

20 Financial instruments (De_22

20 Financial instruments (Details 21) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Brazilian real/u.s. dollar exchange rate [member] | Bond [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	R$ 433084
Reasonably possible gain (loss)	(5,443,471)
Possible gain (loss)	(16,330,414)
Brazilian real/u.s. dollar exchange rate [member] | Braskem idesa borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	84,014
Reasonably possible gain (loss)	(1,055,976)
Possible gain (loss)	(3,167,929)
Brazilian real/u.s. dollar exchange rate [member] | Export prepayments [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	11,245
Reasonably possible gain (loss)	(141,336)
Possible gain (loss)	(424,009)
Brazilian real/u.s. dollar exchange rate [member] | Investments [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	10,873
Reasonably possible gain (loss)	(136,663)
Possible gain (loss)	(409,988)
Brazilian real/u.s. dollar exchange rate [member] | SACE [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	21,061
Reasonably possible gain (loss)	(264,720)
Possible gain (loss)	(794,160)
Brazilian real/u.s. dollar exchange rate [member] | Dollar call and put options [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	43,060	[1]
Reasonably possible gain (loss)	(568,577)	[1]
Possible gain (loss)	(2,117,282)	[1]
Brazilian real/u.s. dollar exchange rate [member] | Swap NCE [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	5,973
Reasonably possible gain (loss)	(75,052)
Possible gain (loss)	(225,210)
Brazilian real/u.s. dollar exchange rate [member] | Dollar swap CDI [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	20,419
Reasonably possible gain (loss)	(256,577)
Possible gain (loss)	(769,919)
Brazilian real/u.s. dollar exchange rate [member] | MONFORTE [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	3,278
Reasonably possible gain (loss)	(41,201)
Possible gain (loss)	(123,603)
Brazilian real/u.s. dollar exchange rate [member] | Nexi [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	12,844
Reasonably possible gain (loss)	(161,433)
Possible gain (loss)	(484,299)
Brazilian real/u.s. dollar exchange rate [member] | Other [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	5,699
Reasonably possible gain (loss)	(71,635)
Possible gain (loss)	(214,904)
Brazilian real/u.s. dollar exchange rate [member] | Financial Investments Abroad [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(52)
Reasonably possible gain (loss)	648
Possible gain (loss)	1,943
Libor floating interest rate [member] | Braskem idesa borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(39,804)
Reasonably possible gain (loss)	(95,278)
Possible gain (loss)	(285,834)
Libor floating interest rate [member] | Export prepayments [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(2,232)
Reasonably possible gain (loss)	(5,344)
Possible gain (loss)	(16,031)
Libor floating interest rate [member] | Investments [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(9,734)
Reasonably possible gain (loss)	(23,301)
Possible gain (loss)	(69,902)
Libor floating interest rate [member] | SACE [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(20,954)
Reasonably possible gain (loss)	(50,158)
Possible gain (loss)	(150,473)
Libor floating interest rate [member] | MONFORTE [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(1,228)
Reasonably possible gain (loss)	(2,940)
Possible gain (loss)	(8,819)
Libor floating interest rate [member] | Nexi [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(18,355)
Reasonably possible gain (loss)	(43,936)
Possible gain (loss)	(131,809)
Libor floating interest rate [member] | Other [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(1,178)
Reasonably possible gain (loss)	(2,820)
Possible gain (loss)	(8,460)
Libor floating interest rate [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	4,386
Reasonably possible gain (loss)	10,536
Possible gain (loss)	31,419
CDI interest rate [member] | Export credit notes [member]
Disclosure of detailed information about financial instruments [line items]
Reasonably possible gain (loss)	(3,942)
Possible gain (loss)	(11,905)
CDI interest rate [member] | Debentures [member]
Disclosure of detailed information about financial instruments [line items]
Reasonably possible gain (loss)	(848)
Possible gain (loss)	(2,574)
CDI interest rate [member] | Financial investments in local currency [member]
Disclosure of detailed information about financial instruments [line items]
Reasonably possible gain (loss)	36
Possible gain (loss)	108
CDI interest rate [member] | Other non commercial paper [member]
Disclosure of detailed information about financial instruments [line items]
Reasonably possible gain (loss)	(3,486)
Possible gain (loss)	(10,493)
IPCA interest rate [member] | Debentures [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(268)
Reasonably possible gain (loss)	(21,395)
Possible gain (loss)	(68,834)
IPCA interest rate [member] | BNDES [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(2,493)
Reasonably possible gain (loss)	(212,224)
Possible gain (loss)	(780,565)
IPCA interest rate [member] | BNB/ FINEP/ FUNDES/FINISA/FINAME/FNE [member]
Disclosure of detailed information about financial instruments [line items]
Probable gain (loss)	(9)
Reasonably possible gain (loss)	(715)
Possible gain (loss)	(2,336)
Selic interest rate [member] | Leniency agreement [member]
Disclosure of detailed information about financial instruments [line items]
Reasonably possible gain (loss)	(6,164)
Possible gain (loss)	R$ 18516
[1]	The Company is in the short position of a possible counterparty call.

20 Financial instruments (De_23

20 Financial instruments (Details Narrative) R$ in Thousands	Mar. 31, 2020BRL (R$)Number	Jan. 02, 2020BRL (R$)Number	May 01, 2013	Dec. 31, 2020BRL (R$)Number	Oct. 10, 2017Number	Sep. 30, 2015BRL (R$)	Apr. 30, 2015BRL (R$)	Oct. 01, 2014BRL (R$)	Mar. 01, 2013Number
Domestic market [member]
Disclosure of detailed information about financial instruments [line items]
Default indicators				27.00%
Export market [member]
Disclosure of detailed information about financial instruments [line items]
Default indicators				80.00%
Probable scenario [member] | TJLP [member]
Disclosure of detailed information about financial instruments [line items]
Percentage of rate				0.135%
US | Probable scenario [member]
Disclosure of detailed information about financial instruments [line items]
Average strike price | Number				2
Derivative financial instrument				R$ 514
Percentage of selic rate				15.866%
Top of Range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity terms				24 months
Put options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount				R$ 2000000
Average strike price | Number				4
Put options [member] | US | Value at risk [member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial instrument				R$ 91437
Call options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount				R$ 1500000
Average strike price | Number				6
Currency swap contract [member]
Disclosure of detailed information about financial instruments [line items]
Maturity terms				5 years
Derivative financial instrument				R$ 1300000
Derivative starting date				January 2019
Derivative amount payable date				January 2020
Future exports [member]
Disclosure of detailed information about financial instruments [line items]
Average strike price | Number				1
Future exports [member] | US
Disclosure of detailed information about financial instruments [line items]
Average strike price | Number	5	4			3				4
Maturity terms	2020	2032	Between 2030 and 2031
Designated	R$ 362000	R$ 600000
Hedge discontinued				R$ 1617372
Hedge discontinued rate | Number									4
Average export per year				R$ 2800000
Future exports [member] | Top of Range [member] | US
Disclosure of detailed information about financial instruments [line items]
Percentage of hedged exports				30.00%
Future exports [member] | Bottom of range [member] | US
Disclosure of detailed information about financial instruments [line items]
Percentage of hedged exports				20.00%
New financial instruments [member]
Disclosure of detailed information about financial instruments [line items]
Average strike price | Number				1
Maturity terms				2028
Project finance [member] | Braskem Idesa [member]
Disclosure of detailed information about financial instruments [line items]
Derivative liabilities								R$ 2878936
Project finance [member] | US
Disclosure of detailed information about financial instruments [line items]
Hedge discontinued				R$ 752870
Project finance [member] | US | Braskem Idesa [member]
Disclosure of detailed information about financial instruments [line items]
Derivative liabilities						R$ 23608	R$ 290545
Swap Contract [member] | US | Value at risk [member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial instrument				128
Dollar swap [member] | US | Value at risk [member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial instrument				29,511
NCE swap [member] | US | Value at risk [member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial instrument				R$ 8623

21 Taxes payable (Details)

21 Taxes payable (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	R$ 954059	R$ 452239
Taxes payable, current	952,689	322,886
Taxes payable, noncurrent	1,370	129,353
Other countries [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	954,059	452,239
Other countries [member] | Value-added tax [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	16,027	11,933
Other countries [member] | Other [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	80,768	8,112
BRAZIL | IPI [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	125,338	58,945
BRAZIL | ICMS - interstate purchases [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	403,422	184,728
BRAZIL | PIS and COFINS [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	284,944	150,664
BRAZIL | Other [member]
DisclosureOfTaxesPayableLineItems [Line Items]
Taxes payable	R$ 43560	R$ 37857

22 Income tax (''IR'') and so_3

22 Income tax (''IR'') and social contribution (''CSL'') (Details) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Ir And Social Contribution
(Loss) before IR and CSL		R$ 9683784	R$ 4603068	R$ 3604736
IR and CSL at the rate of 34%		3,292,487	1,565,043	(1,225,610)
Permanent adjustments to the IR and CSL calculation basis
IR and CSL on equity in results of investees		6,595	3,469	(302)
Thin capitalization		(695,741)	(221,337)
Effect of the refund of Braskem America's tax benefit	[1]	(737,841)
Difference of rate applicable to each country	[2]	252,323	293,647	468,129
Fine in leniency agreement			(25,390)
Effect from the retrospective tax rate on bonus depreciation of Braskem America		334,460
Other permanent adjustments		216,195	347,238	21,232
Effect of IR and CSL on results of operations		(2,668,478)	(1,962,670)	736,551
Current IR and CSL expense
Current year		(52,830)	(251,641)	(512,951)
Changes in estimates related to prior years			22,696	3,177
Total current IR and CSL expense		(52,830)	(228,945)	(509,774)
Deferred IR and CSL expense
Origination and reversal of temporary differences		2,677,328	2,062,501	(369,546)
Tax losses (IR) and negative base (CSL)			129,114	142,769
Recognition of previously unrecognised deductible temporary differences		43,980
Total deferred IR and CSL		2,721,308	2,191,615	(226,777)
Total		R$ 2668478	R$ 1962670	R$ 736551
Effective rate		27.60%	42.60%	20.40%
[1]	Considering Universal Basis Taxation ("TBU"), the tax refund provided by U.S. Government affects the tax calculation of Braskem S.A. arising from the offsetting of Income Tax and Social Contribution Tax (IRPJ/CSLL) in the years of use of the bonus depreciation benefit. The amount calculated was R$738 million, which was recorded under current and non-current liabilities, in the item income tax and social contribution tax.
[2]	Includes the impact from the difference between IR/CSL tax rate in Brazil (34%) used for the preparation of this note and the tax rates in countries where the subsidiaries abroad are located, as follows.

22 Income tax (''IR'') and so_4

22 Income tax (''IR'') and social contribution (''CSL'') (Details 1)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsidiary one [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem Alemanha
Headquarters country	Germany
Official rate	31.18%	31.18%	31.18%
Subsidiary two [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem America e Braskem America Finance
Headquarters country	USA
Official rate	21.00%	21.00%	21.00%
Subsidiary three [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem Argentina
Headquarters country	Argentina
Official rate	30.00%	30.00%	30.00%
Subsidiary four [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem Chile
Headquarters country	Chile
Official rate	27.00%	27.00%	27.00%
Subsidiary five [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem Holanda, Braskem Holanda Finance and Braskem Holanda Inc
Headquarters country	Netherlands
Official rate	25.00%	25.00%	25.00%
Subsidiary six [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem Idesa, Braskem Idesa Servicos, Braskem Mexico
Subsidiary seven [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem Mexico Servicos and Braskem Mexico Proyectos
Headquarters country	Mexico
Official rate	30.00%	30.00%	30.00%
Subsidiary eight [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Subsidiary name	Braskem India
Headquarters country	India
Official rate	30.00%

22 Income tax (''IR'') and so_5

22 Income tax (''IR'') and social contribution (''CSL'') (Details 2) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Presentation in the balance sheet:
Non-current assets		R$ 8529972	R$ 2662596		R$ 1104158
Non-current liabilities		1,234,398	273,036		381,582
Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		3,470,087	2,516,275
Impact on the P&L		3,696,310	665,718
Impact on the equity			288,094
other comprehensive income		(2,184,706)
Ending balance		4,981,691	3,470,087
Presentation in the balance sheet:
Non-current liabilities					R$ 381582
Net [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		722,576	2,389,560
Impact on the P&L		2,191,615	2,721,308
other comprehensive income			2,184,706
Other		(288,094)
Ending balance		(236,537)	722,576
Temporary adjustments [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance	[1]	432,587	276,700
Impact on the P&L		(274,355)	155,887	[1]
Ending balance		158,232	432,587	[1]
Business combination [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		1,302	1,302
Ending balance		1,302	1,302
Other [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		5,437	3,783
Impact on the P&L		407,069	94,938
Impact on the equity			(93,284)
other comprehensive income		(408,981)
Ending balance		3,525	5,437
Amortization of goodwill based on future profitability [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		722,685	723,336
Impact on the P&L		(463)	(651)
Ending balance		722,222	722,685
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		393,773	444,075
Impact on the P&L		(114,452)	(50,302)
Ending balance		279,321	393,773
Tax depreciation [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		1,903,027	1,009,912
Impact on the P&L		1,834,142	893,115
Ending balance		3,737,169	1,903,027
Present value adjustment and amortized cost [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		11,276	57,167
Impact on the P&L		68,644	(45,891)
Ending balance		79,920	11,276
Hedge accounting [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Impact on the P&L		1,788,568	(419,269)
Impact on the equity			419,269
other comprehensive income		(1,788,568)
Long-term incentive plan ("ILP plan") [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Impact on the P&L		(4,823)	(5,843)
Impact on the equity			5,843
other comprehensive income		4,823
Health care [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Impact on the P&L		(8,020)	43,734
Impact on the equity			(43,734)
other comprehensive income		8,020
Assets [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		5,859,647	3,238,851
Impact on the P&L		6,417,618	2,857,333
Other			(236,537)
Ending balance		12,277,265	5,859,647
Assets [member] | Tax losses (IR) And negative base (CSL) [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		2,150,692	2,021,578
Impact on the P&L		1,127,492	129,114
Ending balance		3,278,184	2,150,692
Assets [member] | Goodwill amortized [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		21,677	39,282
Impact on the P&L		(15,157)	(17,605)
Ending balance		6,520	21,677
Assets [member] | Exchange variations [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		1,132,351	39,959
Impact on the P&L		2,685,264	1,092,392
Ending balance		3,817,615	1,132,351
Assets [member] | Temporary adjustments [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance	[1]	2,357,267	802,170
Impact on the P&L	[1]	2,639,070	1,555,097
Ending balance	[1]	4,996,337	2,357,267
Assets [member] | Business combination [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		85,539	159,572
Impact on the P&L		(29,328)	(74,033)
Ending balance		56,211	85,539
Assets [member] | Tax credits [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		49,833	176,290
Impact on the P&L		27,199	110,080
Other			(236,537)
Ending balance		77,032	49,833
Assets [member] | Other [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Beginning balance		62,288
Impact on the P&L		(16,922)	62,288
Ending balance		R$ 45366	R$ 62288
[1]	Temporary provisions include the deferred tax on provision for geological event in Alagoas (R$3,190 million), contingencies (R$424 million), among other provisions.

22 Income tax (''IR'') and so_6

22 Income tax (''IR'') and social contribution (''CSL'') (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Tax calculation, liabilities	R$ 4981691	R$ 3470087
IR and CSl offsetting, liabilites	(3,747,293)	(3,197,051)
Balance, liabilities	R$ 1234398	R$ 273036
Braskem s.a. [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Brazil	Brazil
Tax calculation, liabilities	R$ 2090002	R$ 2072130
IR and CSl offsetting, liabilites	R$ 2090002	R$ 2072130
Braskem america [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	USA	USA
Tax calculation, liabilities	R$ 1528340	R$ 271285
IR and CSl offsetting, liabilites	(293,942)
Balance, liabilities	1,234,398	R$ 271285
Braskem chile [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country		Chile
Tax calculation, liabilities	268	R$ 1913
IR and CSl offsetting, liabilites	R$ 268	(162)
Balance, liabilities		R$ 1751
Braskem idsea [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Mexico	Mexico
Tax calculation, liabilities	R$ 1356693	R$ 1117641
IR and CSl offsetting, liabilites	R$ 1356693	R$ 1117641
Cetrel [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Brazil	Brazil
Tax calculation, liabilities	R$ 5269	R$ 5846
IR and CSl offsetting, liabilites	R$ 5269	R$ 5846
DAC [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Brazil	Brazil
Tax calculation, liabilities	R$ 1387	R$ 1272
IR and CSl offsetting, liabilites	(1,387)	(1,272)
Assets [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Tax calculation, assets	12,277,265	5,859,647
IR and CSL offsetting, assets	(3,747,293)	(3,197,051)
Balance, assets	R$ 8529972	R$ 2662596
Assets [member] | Braskem mexico servicos [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Mexico	Mexico
Tax calculation, assets	R$ 8503	R$ 9677
Balance, assets	R$ 8503	R$ 9677
Assets [member] | Braskem s.a. [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Brazil	Brazil
Tax calculation, assets	R$ 8626703	R$ 3679547
IR and CSL offsetting, assets	(2,090,002)	(2,072,130)
Balance, assets	R$ 6536701	R$ 1607417
Assets [member] | Braskem argentina [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Argentina	Argentina
Tax calculation, assets	R$ 2850	R$ 1010
Balance, assets	R$ 2850	R$ 1010
Assets [member] | Braskem america [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	USA
Tax calculation, assets	R$ 293942
IR and CSL offsetting, assets	R$ 293942
Assets [member] | Braskem alemanha [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Germany	Germany
Tax calculation, assets	R$ 47277	R$ 28176
Balance, assets	R$ 47277	R$ 28176
Assets [member] | Braskem chile [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Chile	Chile
Tax calculation, assets	R$ 287	R$ 162
IR and CSL offsetting, assets		(162)
Balance, assets	R$ 287
Assets [member] | Braskem idsea [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Mexico	Mexico
Tax calculation, assets	R$ 3213624	R$ 2056723
IR and CSL offsetting, assets	(1,356,693)	(1,117,641)
Balance, assets	R$ 1856931	R$ 939082
Assets [member] | Braskem idesa servicos [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Mexico
Tax calculation, assets	R$ 14765
Balance, assets	R$ 14765
Assets [member] | Cetrel [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Brazil	Brazil
Tax calculation, assets	R$ 23645	R$ 24313
IR and CSL offsetting, assets	(5,269)	(5,846)
Balance, assets	R$ 18376	R$ 18467
Assets [member] | DAC [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Headquarters country	Brazil	Brazil
Tax calculation, assets	R$ 45669	R$ 60039
IR and CSL offsetting, assets	(1,387)	(1,272)
Balance, assets	R$ 44282	R$ 58767

22 Income tax (''IR'') and so_7

22 Income tax (''IR'') and social contribution (''CSL'') (Details 4) R$ in Thousands	Dec. 31, 2020BRL (R$)
2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	R$ 7295574
2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	4,981,691
2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,866,697
2021 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	914,633
2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	847,334
2022 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	731,832
2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	545,205
2023 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	583,605
2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	437,218
2024 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	591,835
2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	359,506
2025 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	376,135
2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,223,126
2026 to 2028 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,525
2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	16,488
2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,446,177
Business combination [member] | 2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,302	[1]
Business combination [member] | 2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,302	[1]
Other [member] | 2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,525
Other [member] | 2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,525
Tax depreciation [member] | 2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,737,169	[2]
Tax depreciation [member] | 2021 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	857,451	[2]
Tax depreciation [member] | 2022 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	666,224	[2]
Tax depreciation [member] | 2023 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	528,555	[2]
Tax depreciation [member] | 2024 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	528,929	[2]
Tax depreciation [member] | 2025 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	311,245	[2]
Tax depreciation [member] | 2026 to 2028 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	158,330	[2]
Tax depreciation [member] | 2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	686,435	[2]
Amortization of goodwill based on future profitability [member] | 2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	722,222	[3]
Amortization of goodwill based on future profitability [member] | 2021 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	330	[4]
Amortization of goodwill based on future profitability [member] | 2022 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	303	[4]
Amortization of goodwill based on future profitability [member] | 2023 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	280	[4]
Amortization of goodwill based on future profitability [member] | 2024 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	913	[4]
Amortization of goodwill based on future profitability [member] | 2025 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,370	[4]
Amortization of goodwill based on future profitability [member] | 2026 to 2028 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,917	[3]
Amortization of goodwill based on future profitability [member] | 2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	717,109	[3]
Present value adjustment and amortized cost [member] | 2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	79,920	[5]
Present value adjustment and amortized cost [member] | 2021 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,826	[5]
Present value adjustment and amortized cost [member] | 2022 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	12,279	[5]
Present value adjustment and amortized cost [member] | 2023 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,744
Present value adjustment and amortized cost [member] | 2024 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	8,967
Present value adjustment and amortized cost [member] | 2025 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	10,494
Present value adjustment and amortized cost [member] | 2026 to 2028 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	22,386
Present value adjustment and amortized cost [member] | 2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	20,224
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2020 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	279,321
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2021 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	35,445
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2022 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	35,445
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2023 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	35,445
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2024 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	35,445
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2025 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	35,445
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2026 to 2028 [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	102,096
Amortization of fair value adjustments on the assets from the acquisiton of braskem qpar [member] | 2029 therafter [member] | Liabilities [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	0
Assets [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	12,277,265
Assets [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	2,781,330
Assets [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,579,166
Assets [member] | 2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,128,810
Assets [member] | 2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,029,053
Assets [member] | 2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	735,641
Assets [member] | 2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,560,600
Assets [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,462,665
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,278,184	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	223,932	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	362,165	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	419,451	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	566,290	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	629,925	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,076,421	[6]
Assets [member] | Tax losses (IR) And negative base (CSL) [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	337,474
Assets [member] | Goodwill amortized [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	6,520
Assets [member] | Goodwill amortized [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	4,020
Assets [member] | Goodwill amortized [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	323
Assets [member] | Goodwill amortized [member] | 2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	323
Assets [member] | Goodwill amortized [member] | 2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	323
Assets [member] | Goodwill amortized [member] | 2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	323
Assets [member] | Goodwill amortized [member] | 2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	968
Assets [member] | Goodwill amortized [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	240
Assets [member] | Exchange variations [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	3,817,615	[7]
Assets [member] | Exchange variations [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,002,396	[7]
Assets [member] | Exchange variations [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	155,813	[7]
Assets [member] | Exchange variations [member] | 2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	81,553	[7]
Assets [member] | Exchange variations [member] | 2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	422,587	[7]
Assets [member] | Exchange variations [member] | 2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	88,013	[7]
Assets [member] | Exchange variations [member] | 2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,050,218	[7]
Assets [member] | Exchange variations [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,017,035	[7]
Assets [member] | Temporary adjustments [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	4,996,337	[8]
Assets [member] | Temporary adjustments [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,444,987	[8]
Assets [member] | Temporary adjustments [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,033,617	[8]
Assets [member] | Temporary adjustments [member] | 2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	627,483	[8]
Assets [member] | Temporary adjustments [member] | 2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	39,853	[8]
Assets [member] | Temporary adjustments [member] | 2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,738	[8]
Assets [member] | Temporary adjustments [member] | 2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	1,432,993	[8]
Assets [member] | Temporary adjustments [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	400,024	[8]
Assets [member] | Business combination [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	56,211	[9]
Assets [member] | Business combination [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	28,963	[9]
Assets [member] | Business combination [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	27,248	[9]
Assets [member] | Tax credits [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	77,032	[4]
Assets [member] | Tax credits [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	77,032	[4]
Assets [member] | Other [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	45,366
Assets [member] | Other [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	45,366
Liabilities [member] | Temporary adjustments [member] | 2020 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	158,232	[10]
Liabilities [member] | Temporary adjustments [member] | 2021 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	17,581	[10]
Liabilities [member] | Temporary adjustments [member] | 2022 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	17,581	[10]
Liabilities [member] | Temporary adjustments [member] | 2023 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	17,581	[10]
Liabilities [member] | Temporary adjustments [member] | 2024 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	17,581	[10]
Liabilities [member] | Temporary adjustments [member] | 2025 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	17,581	[10]
Liabilities [member] | Temporary adjustments [member] | 2026 to 2028 [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	52,745	[10]
Liabilities [member] | Temporary adjustments [member] | 2029 therafter [member]
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Deferred tax assets/liabilites	R$ 17582	[10]
[1]	Fair value adjustments on property, plant and equipment and intangible assets identified in business combinations, whose tax realization is based on the depreciation and amortization of these assets.
[2]	For calculation of IR and CSL, assets are depreciated at rates higher than those used for accounting purposes. As tax depreciation is exhausted, these deferred IR and CSL start to be realized.
[3]	Goodwill for the future profitability of the merged companies is not amortized since the adoption of Law 11.638/07.Tax realization is associated with the write-off of goodwill due to impairment or upon divestment.
[4]	Tax credits arising from the balance of tax paid on profit abroad and the worker's food program.
[5]	Additional adjustment, upon adoption of Law 11.638/07 of property, plant and equipment, whose tax realization is based on the depreciation of assets.
[6]	In Brazil, the use of tax losses is limited to 30% of the taxable profit for the year; however, the balance does not expire. Meanwhile, in Mexico there is no limit on the amount that can be used in the year; however, the tax losses expire in 10 years. The realization of Tax Losses in the consolidated results consider the taxable profit expected by the Company over a 10-year horizon. For the Braskem S.A., this realization is associated with the completion of administrative processes related to years in which such tax losses were sustained.
[7]	In Brazil, the Company opted to tax exchange variation of assets and liabilities denominated in foreign currency under the cash method. Thus, this variation will be realized as assets and liabilities are received paid. For accounting purposes, exchange variation is recognized under the accrual basis, which results in the recognition of deferred IR and CSL.
[8]	Accounting expenses not yet deductible for calculating income tax and social contribution, whose recognition for tax purposes occurs in subsequent periods. In 2019 and 2020, the provisioning of expenses arising from the geological event in Alagoas produced a material impact.
[9]	Refers to tax-related goodwill and contingencies recognized from business combinations. Tax realization of goodwill occurs upon the merger of the investments and contingencies arising from write-offs due to the settlement or reversal of the processes involved.
[10]	Accounting provisions of transaction costs in financing acquisitions.

22 Income tax (''IR'') and so_8

22 Income tax (''IR'') and social contribution (''CSL'') (Details Narrative) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Tax rate losses	75.00%
Losses expire	10 years
Income tax and social contribution	R$ 1547916
Tax refund amount	R$ 982000
Percentage of deduction of depreciation	100.00%
BRAZIL
DisclosureOfIncomeTaxAndSocialContributionLineItems [Line Items]
Tax rates	34.00%
Tax rate losses	30.00%

23 Sundry provisions (Details)

23 Sundry provisions (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfSundryProvisionsLineItems [Line Items]
Sundry provisions	R$ 874208	R$ 505206
Sundry provisions, current	362,407	203,134
Sundry provisions, noncurrent	511,801	302,072
Recovery of environmental damage [member]
DisclosureOfSundryProvisionsLineItems [Line Items]
Sundry provisions	602,490	365,155
Provision for customers rebates [member]
DisclosureOfSundryProvisionsLineItems [Line Items]
Sundry provisions	123,465	84,110
Other [member]
DisclosureOfSundryProvisionsLineItems [Line Items]
Sundry provisions	R$ 148253	R$ 55941

23 Sundry provisions (Details 1

23 Sundry provisions (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfSundryProvisionsLineItems [Line Items]
Beginning balance	R$ 505206	R$ 424542
Additions, inflation adjustments and exchange variation, net	576,237	253,110
Write-offs through usage and payments	(207,235)	(172,446)
Ending balance	874,208	505,206
Rebate [member]
DisclosureOfSundryProvisionsLineItems [Line Items]
Beginning balance	84,110	88,026
Additions, inflation adjustments and exchange variation, net	150,132	74,299
Write-offs through usage and payments	(110,777)	(78,215)
Ending balance	123,465	84,110
Recovery of environmental damage [member]
DisclosureOfSundryProvisionsLineItems [Line Items]
Beginning balance	365,155	307,546
Additions, inflation adjustments and exchange variation, net	306,274	144,617
Write-offs through usage and payments	(68,939)	(87,008)
Ending balance	602,490	365,155
Other [member]
DisclosureOfSundryProvisionsLineItems [Line Items]
Beginning balance	55,941	28,970
Additions, inflation adjustments and exchange variation, net	119,831	34,194
Write-offs through usage and payments	(27,519)	(7,223)
Ending balance	R$ 148253	R$ 55941

24 Contingencies (Details)

24 Contingencies (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	R$ 1151087	R$ 1151524
Corporate claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	126,057	118,485
Civil claims and other [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	52,229	45,514
Tax claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	318,267	307,760
Tax claims [member] | IR and CSL [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	57,662	22,284
Tax claims [member] | PIS and COFINS [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	226,742	196,356
Tax claims [member] | ICMS - interstate purchases [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	14,104	70,645
Tax claims [member] | Other tax claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	19,759	18,475
Business combination [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	374,468	364,328
Business combination [member] | IR and CSL [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	3,680	3,581
Business combination [member] | PIS and COFINS [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	65,041	63,291
Business combination [member] | ICMS - interstate purchases [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	305,747	297,456
Labor claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Contingencies	R$ 280066	R$ 315437

24 Contingencies (Details 1)

24 Contingencies (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfContingenciesLineItems [Line Items]
Beginning balance	R$ 1151524	R$ 965317
Additions, inflation adjustments and exchange variation	313,137	439,621
Payments	(72,989)	(93,455)
Reversals	(240,585)	(159,959)
Ending balance	1,151,087	1,151,524
Labor claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Beginning balance	315,437	177,751
Additions, inflation adjustments and exchange variation	140,386	322,102
Payments	(42,174)	(83,189)
Reversals	(133,583)	(101,227)
Ending balance	280,066	315,437
Tax claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Beginning balance	672,088	607,079
Additions, inflation adjustments and exchange variation	130,302	98,618
Payments	(21,649)	(6,348)
Reversals	(88,006)	(27,261)
Ending balance	692,735	672,088
Corporate claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Beginning balance	118,485	111,049
Additions, inflation adjustments and exchange variation	10,242	7,436
Reversals	(2,670)
Ending balance	126,057	118,485
Civil claims and other [member]
DisclosureOfContingenciesLineItems [Line Items]
Beginning balance	45,514	69,438
Additions, inflation adjustments and exchange variation	32,207	11,465
Payments	(9,166)	(3,918)
Reversals	(16,326)	(31,471)
Ending balance	R$ 52229	R$ 45514

24 Contingencies (Details 2)

24 Contingencies (Details 2) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	R$ 15445656	R$ 42130701
Tax claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	11,911,746	6,199,283
Civil claims - alagoas [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	796,712	33,973,320
Civil claims - other [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	708,120	769,126
Labor claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	663,448	642,229
Environmental claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	507,973	166,897
Social security claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	326,730	29,830
Other lawsuits [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	R$ 530927	R$ 350016

24 Contingencies (Details Narra

24 Contingencies (Details Narrative) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)Number	Dec. 31, 2019BRL (R$)Number	Dec. 31, 2009BRL (R$)
DisclosureOfContingenciesLineItems [Line Items]
Labor claims for health and security cases	R$ 529	R$ 604
Excess weight amount	61,800	61,200
Amount of provision for possibility of outflow of resources	16,900
Possible amount chance to loss	206,400
Tax claims ICMS [member]
DisclosureOfContingenciesLineItems [Line Items]
Undue use amount	R$ 58164
Percentage fine for tax offense	100.00%
Adjusted value of cases	R$ 569000
PIS and COFINS sundry [member]
DisclosureOfContingenciesLineItems [Line Items]
Labor claims for health and security cases	130,000
PIS and COFINS taxes [member] | Tax claims ICMS [member]
DisclosureOfContingenciesLineItems [Line Items]
Amount related surplus	438,044	2,048,782
Offset amount of total tax credit	2,067,215	2,350,817
Estimated future recognition related other lawsuits	2,000,000
PIS and COFINS taxes [member] | Tax claims ICMS [member] | Current assets [member]
DisclosureOfContingenciesLineItems [Line Items]
Offset amount of total tax credit	1,002,605	783,199
PIS and COFINS taxes [member] | Tax claims ICMS [member] | Non-current assets [member]
DisclosureOfContingenciesLineItems [Line Items]
Offset amount of total tax credit		1,567,618
PIS and COFINS taxes [member] | Tax claims ICMS [member] | Other operating income expenses [member]
DisclosureOfContingenciesLineItems [Line Items]
Amount related surplus	310,557	1,904,206
PIS and COFINS taxes [member] | Tax claims ICMS [member] | Financial income [member]
DisclosureOfContingenciesLineItems [Line Items]
Amount related surplus	127,488	207,582
Tax contingent liability [member] | Tax claims ICMS [member]
DisclosureOfContingenciesLineItems [Line Items]
Provisions for fine for tax offense	305,747	297,456
Claims with possible chance of loss	883,000	740,000
Tax contingent liability [member] | IOF [member]
DisclosureOfContingenciesLineItems [Line Items]
Amount of reducing contingency	108,000
Claims offered as collateral	59,000
Tax contingent liability [member] | IRRF, IR and CSL - commission expenses [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	139,000	133,000
Tax contingent liability [member] | Isolated fine - failure to ratify DCOMPS [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	345,000	289,000
Tax contingent liability [member] | IRPJ/CSLL - negative balance - offset [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	182,000	196,000
Tax contingent liability [member] | PIS and COFINS - dcide-fuels tax offset [member]
DisclosureOfContingenciesLineItems [Line Items]
Adjusted value of cases	116,000
Tax contingent liability [member] | Braskem qpar [member] | Tax claims ICMS [member]
DisclosureOfContingenciesLineItems [Line Items]
Fine for tax offense			R$ 480389
Tax contingent liability [member] | Social security contributions [member]
DisclosureOfContingenciesLineItems [Line Items]
Other administrative proceedings	182,000	47,000
Tax contingent liability [member] | PIS and COFINS taxes [member]
DisclosureOfContingenciesLineItems [Line Items]
Provisions for fine for tax offense	65,041	63,291
Claims with possible chance of loss	892,000
Tax contingent liability [member] | IR and CSL - charges with goodwill amortization [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	279,000
Tax contingent liability [member] | Non cumulative PIS and COFINS taxes [member]
DisclosureOfContingenciesLineItems [Line Items]
Provisions for fine for tax offense	197,707	193,139
Claims with possible chance of loss	1,300,000	1,200,000
Tax contingent liability [member] | IRPJ and CSLL - Foreign earned income [member]
DisclosureOfContingenciesLineItems [Line Items]
Adjusted amount of uncertain tax treatment	3,700,000
Tax contingent liability [member] | IRPJ and CSLL - Foreign earned income [member] | Braskem mexico [member]
DisclosureOfContingenciesLineItems [Line Items]
Adjusted amount of uncertain tax treatment	96,100
Corporate claims [member]
DisclosureOfContingenciesLineItems [Line Items]
Unsecured provision for corporate claims	66,957	64,305
Civil claims resale of solvents [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	222,800	204,600
Hashimoto public-interest civil action [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	144,400	126,500
Recourse action of insurer [member]
DisclosureOfContingenciesLineItems [Line Items]
Claims with possible chance of loss	84,900	77,700
Caustic soda transportation [member]
DisclosureOfContingenciesLineItems [Line Items]
Indemnification amount	7,400	65,800
Environmental [member]
DisclosureOfContingenciesLineItems [Line Items]
Payment for indemnifiction	277,000
Social Security [member]
DisclosureOfContingenciesLineItems [Line Items]
Estimated disbursement amount	R$ 326700	R$ 29400
Number of active cases deemed | Number	801	771
IR and CSL [member]
DisclosureOfContingenciesLineItems [Line Items]
Percentage amount of the tax deficiency notice	150.00%
Adjusted amount of uncertain tax treatment	R$ 1000000
Claims with possible chance of loss	R$ 352000	R$ 348000

25 Leniency agreement (Details

25 Leniency agreement (Details Narrative) SFr in Thousands, R$ in Thousands, $ in Thousands

Jun. 30, 2021CHF (SFr)

Feb. 01, 2021BRL (R$)

Jan. 30, 2021BRL (R$)

Jun. 30, 2020BRL (R$)

Jun. 30, 2020CHF (SFr)

Jan. 30, 2020BRL (R$)

Jun. 27, 2019BRL (R$)

Jun. 27, 2019CHF (SFr)

Jan. 30, 2019BRL (R$)

Jun. 28, 2018BRL (R$)

Jun. 28, 2018CHF (SFr)

Jan. 30, 2018BRL (R$)

Jul. 06, 2017BRL (R$)

Jun. 27, 2017BRL (R$)

Jun. 27, 2017CHF (SFr)

Apr. 27, 2017USD ($)

Apr. 27, 2017BRL (R$)

Feb. 08, 2017USD ($)

Feb. 08, 2017BRL (R$)

Dec. 31, 2016USD ($)

Dec. 31, 2016BRL (R$)

Leniency Agreements [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 2700000

Leniency Agreements [member] | Events after reporting period [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 257256

Leniency Agreements [member] | Federal Prosecution Office And U.S. And Swiss Authorities [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 3100000

Leniency Agreements [member] | Federal Prosecution Office And U.S. And Swiss Authorities [member] | US

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount | $

$ 957,000

Leniency Agreements [member] | Department Of Justice [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 296591

Leniency Agreements [member] | Department Of Justice [member] | US

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount | $

$ 94,894

Leniency Agreements [member] | Securities and Exchange Commission (SEC) [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 206460

Leniency Agreements [member] | Securities and Exchange Commission (SEC) [member] | US

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount | $

$ 65,000

Leniency Agreements [member] | Swiss Office [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 92586

R$ 58034

R$ 62021

R$ 104307

Leniency Agreements [member] | Swiss Office [member] | CHF

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount | SFr

SFr 16,065

SFr 16,065

SFr 16,065

SFr 30,240

Leniency Agreements [member] | Federal Prosecution Office (MPF) [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 278034

R$ 267985

R$ 736445

CGU/AGU Agreement [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 409877

CGU/AGU Agreement [member] | Events after reporting period [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 1100000

CGU/AGU Agreement [member] | Swiss Office [member] | CHF | Events after reporting period [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount | SFr

SFr 16,065

MPF Agreement And CGU/AGU Agreement [member] | Events after reporting period [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 1000000

CGU/AGU Agreement [member] | Events after reporting period [member]

DisclosureOfLeniencyAgreementLineItems [Line Items]

Settlement amount

R$ 302640

26 Geological event - Alagoas_2

26 Geological event - Alagoas (Details) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
GeologicalEventAlagoasLineItems [Line Items]
Provision		R$ 9175777	R$ 3383067
Alagoas [member]
GeologicalEventAlagoasLineItems [Line Items]
Balance at beginning		3,383,067
Provisions		7,116,146
Constitution of present value adjustment		(214,319)
Provision after adjustment		6,901,827
Write-off	[1]	(1,181,931)
Realization of present value adjustment		72,814
Balance at ending		9,175,777
Current liability		4,349,931
Non-current liability		4,825,846
Provision		R$ 9175777
[1]	Of this amount, R$515,509 refers to payments made and R$154,048 was reclassified to the trade payables.

26 Geological event - Alagoas_3

26 Geological event - Alagoas (Details Narrative) R$ in Thousands	Feb. 24, 2020	Dec. 31, 2020BRL (R$)Number	Dec. 31, 2019BRL (R$)
GeologicalEventAlagoasLineItems [Line Items]
Provision		R$ 9175777	R$ 3383067
Provision of current liabilities		4,349,931	1,450,476
Provision of non-current liabilities		4,825,846	1,932,591
Provision accrued amount		5,227,254
Net of adjustment to present value		R$ 5194627
Number of wells implemented | Number		35
Present obligation value		R$ 587949	R$ 470417
Description of reparation for social-environmental		Allocating R$1,580,000 (R$1,515,498 net of adjustment to present value) for the adoption of actions and measures in vacated areas, urban mobility and social compensation actions, with R$300 million going to indemnification for social damages and collective pain and suffering and possible contingencies related to the actions in the vacated areas and urban mobility actions.
Description of indemnifying actions	CBTU presented an amendment to the preliminary injunction to claim the payment of damages in the amount of R$ 222,100, as well as obligations to do, including the construction of a new rail line to substitute the stretch that passes through the vacated area. CBTU attributes to the claim the approximate amount of R$1.3 billion.
Description of individual actions		Braskem was defendant in several actions, that, in aggregate, involve the amount of approximately R$573 million, filed by individuals in Brazil and abroad, seeking the payment of indemnifications related to the geological event in Maceió.
Claiming damages		R$ 181000
Payment of Write-offs		1,137,736
Trade payables		44,195
Wells [member]
GeologicalEventAlagoasLineItems [Line Items]
Provision accrued amount		1,610,095
Net of adjustment to present value		1,585,366
Technical Cooperation Agreement [member]
GeologicalEventAlagoasLineItems [Line Items]
Provision accrued amount		899,934
Net of adjustment to present value		880,286
Technical Cooperation Agreement [member] | Bottom of range [member]
GeologicalEventAlagoasLineItems [Line Items]
Working capital		R$ 100000
Technical Cooperation Agreement [member] | ACP, MPE And DPE [member]
GeologicalEventAlagoasLineItems [Line Items]
Description of reparation for residents		Public-Interest Civil Action for Socio-environmental Reparation claiming the payment of indemnification for damages caused to the buildings and the residents of areas affected in the Pinheiros district and surrounding areas (currently includes the Mutange, Bebedouro and Bom Parto districts), in the total minimum amount of R$6.7 billion, with initial request for provisional measure to freeze the Company’s financial and other assets in the same amount. Successive orders to freeze funds resulted in the court blocking of R$3.7 billion (*) in assets, with the issue by the Company of a performance bond in the total amount of R$6.4 billion. Once the case reached the Federal Courts, the Federal Prosecution Office started to participate in the action. (*) The unfreezing occurred in January 2020. On December 31, 2019, the updated amount is presented in the caption judicial deposits in current assets in the amount of R$2,571,683 and in non-current assets in the amount of R$1,174,424 corresponding to the long-term portion of the payment schedule.
Description of compensation of residents		(i) created a technical group to monitor the geological event and study the areas adjacent to the Civil Defense Map for a period of five years; (ii) transfer R$1 billion to Braskem’s bank account specifically to cover the costs of the PCF, in ten monthly installments of R$100 million each, starting in January 2021; and (iii) reduce the performance bond in force, from R$2 billion to R$1.8 billion.
Description of new assets freezing order		The Agreement enabled the unfreezing of the Company’s assets, the replacement of the former performance bond policies for two new policies in the aggregate amount of R$3 billion (with R$2 billion as guarantee of this ACP and R$1billion for guaranteeing the ACP described in item (ii) below) and the cessation of new asset freezing orders.
Description of envisaged in agreement		The Company undertook to maintain R$2.7 billion in a checking account (R$1.7 billion under the Agreement and an additional R$1 billion under the Amendment), with minimum working capital of R$100 million, whose transactions will be verified by an external audit company. On December 31, 2020, arising from the costs incurred during 2020 related to the PCF, the balance of this checking account corresponded to R$1,322,725 under current assets. During 2021, the Company will allocate R$1 billion to this checking account, in ten monthly installments of R$100 million starting January 2021, as provided for in the Agreement for Compensation of Residents.
Technical Cooperation Agreement [member] | Alagoas State Federal Prosecution Office (MPF-AL) [member]
GeologicalEventAlagoasLineItems [Line Items]
Description of reparation for social-environmental		Public-Interest Civil Action claiming the payment by the Company of indemnification for socio-environmental damages and other collective damages, as well as the adoption of corrective and environmental compliance measures, with preliminary injunction requiring the freezing of assets, suspension of borrowings with the BNDES, formation of an own private fund in the initial amount of R$3.1 billion and the pledging of guarantees in the amount of R$20.5 billion. The original amount of the action, initially at R$28.3 billion, was adjusted by a court decision to R$27.6 billion. In January 2020, the judge of the 3rd Federal Court of Alagoas denied the preliminary requests of the MPF, which filed appealed the decision. To avoid the risk of any new freezing of funds arising from this action, the Company presented a performance bond in the amount of R$1 billion in the process, as defined in the Agreement described in item (i) above.
Description of addition allocation		(i) allocate the additional amount of R$300 million for indemnification for social and collective pain and suffering and possible contingencies related to actions in vacated areas and in urban mobility actions; (ii) constitute a security interest on certain assets of the Company in the amount of R$2.8 billion to replace the performance bond of R$ 1 billion; and (iii) engage specialized consulting firms to support the definition of actions established in the Agreement for Socio-environmental Reparation and the update of the Company’s socio-environmental compliance program.
Allocated amount		R$ 1280

27 Benefits offered to team m_3

27 Benefits offered to team members (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefit plans [line items]
Short-term benefits	R$ 436021	R$ 422013	R$ 390848
Health Care [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	197,683	181,466	162,338
Private Pension [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	94,302	90,687	84,525
Transport [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	66,752	67,761	64,714
Feeding [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	38,400	35,677	33,537
Life Insurance [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	9,875	7,997	5,964
Training [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	14,892	26,261	27,463
Other [member]
Disclosure of defined benefit plans [line items]
Short-term benefits	R$ 14117	R$ 12164	R$ 12307

27 Benefits offered to team m_4

27 Benefits offered to team members (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of defined benefit plans [line items]
Total obligations	R$ 587949	R$ 470417
Fair value of plan assets	(115,875)	(81,342)
Consolidated net balance (non-current liabilities)	472,074	389,075
Novamont Braskem America [member]
Disclosure of defined benefit plans [line items]
Fair value of plan assets	(113,662)	(79,784)
Braskem alemanha [member]
Disclosure of defined benefit plans [line items]
Fair value of plan assets	(2,213)	(1,558)
Defined Benefit [member]
Disclosure of defined benefit plans [line items]
Total obligations	370,860	245,565
Defined Benefit [member] | Novamont Braskem America [member]
Disclosure of defined benefit plans [line items]
Total obligations	113,662	80,593
Defined Benefit [member] | Braskem idsea [member]
Disclosure of defined benefit plans [line items]
Total obligations	17,243	11,408
Defined Benefit [member] | Braskem Alemanha And Netherlands [member]
Disclosure of defined benefit plans [line items]
Total obligations	239,955	153,564
Health Care Plan [member] | Bradesco Saude [member]
Disclosure of defined benefit plans [line items]
Total obligations	R$ 217089	R$ 224852

27 Benefits offered to team m_5

27 Benefits offered to team members (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefit plans [line items]
Balance at beginning of year	R$ 470417	R$ 274366	R$ 240190
Current service cost	17,164	10,931	7,240
Interest cost	23,579	14,796	13,199
Benefits paid	(13,358)	(10,494)	(6,514)
Change plan		8,068	1,391
Actuarial losses (gain)	2,214	167,066	(3,289)
Exchange variation	87,933	5,684	22,149
Balance at the end of the year	587,949	470,417	274,366
Health Insurance [member]
Disclosure of defined benefit plans [line items]
Balance at beginning of year	224,852	90,679	83,233
Current service cost	4,678	2,698	1,398
Interest cost	17,097	8,663	8,293
Benefits paid	(5,949)	(5,817)	(2,669)
Actuarial losses (gain)	(23,589)	128,629	424
Balance at the end of the year	217,089	224,852	90,679
Benefit Plans [member]
Disclosure of defined benefit plans [line items]
Balance at beginning of year	245,487	183,687	156,957
Current service cost	12,486	8,233	5,842
Interest cost	6,482	6,133	4,906
Benefits paid	(7,409)	(4,677)	(3,845)
Change plan		8,068	1,391
Actuarial losses (gain)	25,803	38,437	(3,713)
Exchange variation	87,933	5,684	22,149
Balance at the end of the year	R$ 370782	R$ 245487	R$ 183687

27 Benefits offered to team m_6

27 Benefits offered to team members (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefit plans [abstract]
Balance at beginning of year	R$ 81342	R$ 67993	R$ 46415
Actual return on plan assets	15,791	14,329	(3,200)
Employer contributions		285	20,544
Benefits paid	(4,973)	(3,966)	(3,712)
Exchange variation	23,715	2,701	7,868
Balance at the end of the year	R$ 115875	R$ 81342	R$ 67993

27 Benefits offered to team m_7

27 Benefits offered to team members (Details 4) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefit plans [line items]
Current service cost	R$ 17164	R$ 10931	R$ 7240
Interest cost	23,579	14,796	13,199
Actuarial losses	15,461	28,936	2,500
Amounts recognized in profit and loss	56,204	54,663	22,939
Health Insurance [member]
Disclosure of defined benefit plans [line items]
Current service cost	4,678	2,698	1,398
Interest cost	17,097	8,663	8,293
Amounts recognized in profit and loss	21,775	11,361	9,691
Benefit Plans [member]
Disclosure of defined benefit plans [line items]
Current service cost	12,486	8,233	5,842
Interest cost	6,482	6,133	4,906
Actuarial losses	15,461	28,936	2,500
Amounts recognized in profit and loss	R$ 34429	R$ 43302	R$ 13248

27 Benefits offered to team m_8

27 Benefits offered to team members (Details 5)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Health Insurance [member]
Disclosure of defined benefit plans [line items]
Discount rate	3.99%	3.60%	5.03%
Inflation rate	3.25%	4.00%	4.50%
Aging factor	2.50%	2.50%	2.50%
Medical inflation	3.50%	3.50%	3.50%
Duration	14.99%	15.32%	19.66%
United States Of America [member]
Disclosure of defined benefit plans [line items]
Discount rate	2.60%	3.35%	4.45%
Mexico [member]
Disclosure of defined benefit plans [line items]
Discount rate	7.25%	7.25%
Inflation rate	4.00%	4.00%
Rate of increase in future salary levels	5.00%	5.00%
Germany [member]
Disclosure of defined benefit plans [line items]
Discount rate	0.70%	2.00%	2.00%
Inflation rate	2.00%	2.00%	2.00%
Rate of increase in future salary levels	3.00%	3.00%	3.00%
Rate of increase in future pension plan	1.75%	1.75%	1.75%
Netherlands [member]
Disclosure of defined benefit plans [line items]
Discount rate	0.70%	2.00%	2.00%
Inflation rate	2.00%	2.00%	2.00%
Rate of increase in future salary levels	3.00%	3.00%	3.00%
Rate of increase in future pension plan	1.75%	1.75%	1.75%

27 Benefits offered to team m_9

27 Benefits offered to team members (Details 6) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Health Insurance [member] | Discount Rate [member]
Disclosure of defined benefit plans [line items]
Premise change	1.00%
Premise increase	R$ 26427
Premise reduction	R$ 32925
Health Insurance [member] | Rate Of Increase In Future Pension Plan [member]
Disclosure of defined benefit plans [line items]
Premise change	1.00%
Premise increase	R$ 5335
Premise reduction	R$ 5391
Health Insurance [member] | Life expectancy [member]
Disclosure of defined benefit plans [line items]
Premise change	1.00%
Premise increase	R$ 41186
Premise reduction	R$ 32503
United States Of America [member] | Discount Rate [member]
Disclosure of defined benefit plans [line items]
Premise change	1.00%
Premise increase	R$ 15262
Premise reduction	R$ 13210
United States Of America [member] | Mortality Rate [member]
Disclosure of defined benefit plans [line items]
Premise change	10.00%
Premise increase	R$ 6215
Premise reduction	R$ 1662
Mexico [member] | Discount Rate [member]
Disclosure of defined benefit plans [line items]
Premise change	1.00%
Premise increase	R$ 1502
Premise reduction	R$ 1796
Germany [member] | Discount Rate [member]
Disclosure of defined benefit plans [line items]
Premise change	0.50%
Premise increase	R$ 23415
Premise reduction	R$ 27317
Germany [member] | Rate Of Increase In Future Salary Levels [member]
Disclosure of defined benefit plans [line items]
Premise change	0.50%
Premise increase	R$ 14158
Premise reduction	R$ 13353
Germany [member] | Rate Of Increase In Future Pension Plan [member]
Disclosure of defined benefit plans [line items]
Premise change	0.25%
Premise increase	R$ 6978
Premise reduction	(6,772)
Germany [member] | Life expectancy [member]
Disclosure of defined benefit plans [line items]
Premise increase	5,985
Premise reduction	R$ 6247
Life expectancy	1 year
Netherlands [member] | Discount Rate [member]
Disclosure of defined benefit plans [line items]
Premise change	0.50%
Premise increase	R$ 1248
Premise reduction	R$ 1446
Netherlands [member] | Rate Of Increase In Future Salary Levels [member]
Disclosure of defined benefit plans [line items]
Premise change	0.50%
Premise increase	R$ 740
Premise reduction	R$ 698
Netherlands [member] | Rate Of Increase In Future Pension Plan [member]
Disclosure of defined benefit plans [line items]
Premise change	0.25%
Premise increase	R$ 365
Premise reduction	(354)
Netherlands [member] | Life expectancy [member]
Disclosure of defined benefit plans [line items]
Premise increase	313
Premise reduction	R$ 327
Life expectancy	1 year

27 Benefits offered to team _10

27 Benefits offered to team members (Details 7) R$ in Thousands	Dec. 31, 2020BRL (R$)
Discount Rate [member]
Disclosure of defined benefit plans [line items]
Premise change, cost of services	1.00%
Premise change, interest costs	1.00%
Premise increase, cost of services	R$ 774
Premise increase, interest costs	22
Premise reduction, cost of services	(1,017)
Premise reduction, interest costs	R$ 112
Life expectancy [member]
Disclosure of defined benefit plans [line items]
Premise change, cost of services	1.00%
Premise change, interest costs	1.00%
Premise increase, cost of services	R$ 654
Premise increase, interest costs	3,035
Premise reduction, cost of services	(543)
Premise reduction, interest costs	R$ 2395
Rate Of Increase In Future Pension Plan [member]
Disclosure of defined benefit plans [line items]
Premise change, cost of services	1.00%
Premise change, interest costs	1.00%
Premise increase, cost of services	R$ 116
Premise increase, interest costs	393
Premise reduction, cost of services	(120)
Premise reduction, interest costs	R$ 397

27 Benefits offered to team _11

27 Benefits offered to team members (Details Narrative) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2020$ / sharesR$ / shares	Dec. 31, 2020BRL (R$)NumberR$ / shares	Dec. 31, 2019BRL (R$)Number	Mar. 19, 2020shares	Mar. 13, 2019shares	Mar. 28, 2018shares
Disclosure of defined benefit plans [line items]
Fair value, net of taxes		R$ 11629	R$ 13573
Contributions made by sponsors		46,689	50,888
Employee contributions participants		R$ 74980	R$ 74814
Active participants | Number		5,834	5,764
American depository receipts [member] | US
Disclosure of defined benefit plans [line items]
Issued per share | $ / shares	$ 9.01
Braskem america [member]
Disclosure of defined benefit plans [line items]
Preferred shares (in dollars per shares) | R$ / shares	$ 16.27	R$ 16.27
Contributions made by the participants		R$ 151	R$ 157
Employee no contributions		R$ 170	R$ 171
Active participants | Number		37	38
Braskem Alemanha ("Germany") [member]
Disclosure of defined benefit plans [line items]
Contributions made by the participants		R$ 158	R$ 158
Braskem Holanda ("Netherlands") [member]
Disclosure of defined benefit plans [line items]
Contributions made by the participants		8	8
Subsidiary Braskem Idesa [member]
Disclosure of defined benefit plans [line items]
Employee no contributions		R$ 3037	R$ 2056
Active participants | Number		833	823
Long-Term Incentive Plan 2018 Program [member]
Disclosure of defined benefit plans [line items]
Number of share issued | shares						728,000
Long-Term Incentive Plan 2019 Program [member]
Disclosure of defined benefit plans [line items]
Number of share issued | shares					582,000
Long-Term Incentive Plan 2020 Program [member]
Disclosure of defined benefit plans [line items]
Number of share issued | shares				1,820,000

28 Equity (Details)

28 Equity (Details)	Dec. 31, 2020shares
Disclosure of classes of share capital [line items]
Shares outstanding	797,218,554
Percent of shares outstanding	100.00%
Authorised	1,152,937,970
Treasury shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	1,224,878
Percent of shares outstanding	0.15%
Novonor [member]
Disclosure of classes of share capital [line items]
Shares outstanding	305,517,121
Percent of shares outstanding	38.33%
Petrobras [member]
Disclosure of classes of share capital [line items]
Shares outstanding	288,188,691
Percent of shares outstanding	36.15%
Total [member]
Disclosure of classes of share capital [line items]
Shares outstanding	795,993,676
Percent of shares outstanding	99.85%
ADR [member]
Disclosure of classes of share capital [line items]
Shares outstanding	29,268,378	[1]
Percent of shares outstanding	3.67%	[1]
Other [member]
Disclosure of classes of share capital [line items]
Shares outstanding	173,019,486
Percent of shares outstanding	21.70%
Common shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	451,668,652
Percent of shares outstanding	100.00%
Authorised	535,661,731
Common shares [member] | Novonor [member]
Disclosure of classes of share capital [line items]
Shares outstanding	226,334,623
Percent of shares outstanding	50.11%
Common shares [member] | Petrobras [member]
Disclosure of classes of share capital [line items]
Shares outstanding	212,426,952
Percent of shares outstanding	47.03%
Common shares [member] | Other [member]
Disclosure of classes of share capital [line items]
Shares outstanding	12,907,077
Percent of shares outstanding	2.86%
Common shares [member] | Total [member]
Disclosure of classes of share capital [line items]
Shares outstanding	451,668,652
Percent of shares outstanding	100.00%
Class A preferred shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	345,049,672
Percent of shares outstanding	100.00%
Authorised	616,682,421
Class A preferred shares [member] | Treasury shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	1,224,878
Percent of shares outstanding	0.35%
Class A preferred shares [member] | Novonor [member]
Disclosure of classes of share capital [line items]
Shares outstanding	79,182,498
Percent of shares outstanding	22.95%
Class A preferred shares [member] | Petrobras [member]
Disclosure of classes of share capital [line items]
Shares outstanding	75,761,739
Percent of shares outstanding	21.96%
Class A preferred shares [member] | Other [member]
Disclosure of classes of share capital [line items]
Shares outstanding	159,612,179
Percent of shares outstanding	46.26%
Class A preferred shares [member] | Total [member]
Disclosure of classes of share capital [line items]
Shares outstanding	343,824,794
Percent of shares outstanding	99.65%
Class A preferred shares [member] | ADR [member]
Disclosure of classes of share capital [line items]
Shares outstanding	29,268,378	[1]
Percent of shares outstanding	8.48%	[1]
Class B preferred shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	500,230
Percent of shares outstanding	100.00%
Authorised	593,818
Class B preferred shares [member] | Other [member]
Disclosure of classes of share capital [line items]
Shares outstanding	500,230
Percent of shares outstanding	100.00%
Class B preferred shares [member] | Total [member]
Disclosure of classes of share capital [line items]
Shares outstanding	500,230
Percent of shares outstanding	100.00%
[1]	American Depositary Receipts traded on the New York Stock Exchange (USA).

28 Equity (Details 1)

28 Equity (Details 1) - shares	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Shares outstanding	797,218,554	797,218,554
Treasury shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	1,224,878	1,226,599
Changes in shares	(1,721)
Total [member]
Disclosure of classes of share capital [line items]
Shares outstanding	795,993,676	795,991,955
Changes in shares	1,721
Common shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	451,668,652	451,668,652
Class A preferred shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	343,824,794	343,823,073
Changes in shares	1,721
Class B preferred shares [member]
Disclosure of classes of share capital [line items]
Shares outstanding	500,230	500,230

28 Equity (Details 2)

28 Equity (Details 2) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Disclosure of classes of share capital [line items]
Loss for the year	R$ 6691720
Equity valuation adjustments	7,543
Other	(2,585)
Adjusted loss	(6,667,262)
Accumulated losses for the year	(4,529,547)
Retention of profits [member]
Disclosure of classes of share capital [line items]
Accumulated losses for the year	1,174,301
Tax incentive [member]
Disclosure of classes of share capital [line items]
Accumulated losses for the year	153,478
Legal reserve [member]
Disclosure of classes of share capital [line items]
Accumulated losses for the year	577,476
Revenue Reserves [member]
Disclosure of classes of share capital [line items]
Accumulated losses for the year	1,905,255
Capital reserve [member]
Disclosure of classes of share capital [line items]
Accumulated losses for the year	R$ 232460

28 Equity (Details 3)

28 Equity (Details 3) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of classes of share capital [line items]
Beginning balance		R$ 5282969	R$ 6188922	R$ 5643467
Additional indexation
Realization by depreciation or write-off assets		(39,853)	(40,481)	(40,481)
Income tax and social contribution		13,551	13,764	13,764
Deemed cost of jointly-controlled investment
Realization by depreciation or write-off assets		(1,123)	(1,338)	(1,458)
Income tax and social contribution		382	455	496
Fair value adjustments
Accounts receivable		113	15	(449)
Foreign sales hedge
Exchange rate		(7,326,610)	(391,262)	(3,129,176)
Transfer to result		2,665,787	1,652,267	1,259,352
Income tax and social contribution		1,585,736	(399,464)	645,870
Fair value of Cash flow hedge
Change in fair value		(537,425)	(15,928)	(189,068)
Transfer to result		(62,965)	71,202	37,350
Income tax and social contribution		202,832	(19,805)	54,481
Fair value of cash flow hedge from jointly-controlled (RPR)		1,260	(978)	(2,329)
Actuarial loss with post-employment benefits, net of taxes		(647)	(109,492)	(1,569)
ILP Plan fair value
Change in fair value		16,037	19,763	9,430
Income tax and social contribution		(4,823)	(5,842)	(2,891)
Foreign currency translation adjustment		2,658,042	136,722	801,223
Other		3,695
(Loss) gain from investments			(84)
Effect of CPC 42 / IAS 29 - hyperinflation		8,077	(3,561)
Ending balance		(6,100,903)	(5,282,969)	(6,188,922)
Deemed Cost and Additional Indexation Of PP&E [member]
Disclosure of classes of share capital [line items]
Beginning balance	[1]	123,614	151,214	178,893
Additional indexation
Realization by depreciation or write-off assets	[1]	(39,853)	(40,481)	(40,481)
Income tax and social contribution	[1]	13,551	13,764	13,764
Deemed cost of jointly-controlled investment
Realization by depreciation or write-off assets	[1]	(1,123)	(1,338)	(1,458)
Income tax and social contribution	[1]	382	455	496
ILP Plan fair value
Ending balance	[1]	96,571	123,614	151,214
Fair Value Adjustments[member]
Disclosure of classes of share capital [line items]
Beginning balance	[2]	19,545	5,957
Fair value adjustments
Accounts receivable	[2]	113	15	(449)
ILP Plan fair value
Change in fair value	[2]	16,452	19,415	9,297
Income tax and social contribution	[2]	(4,823)	(5,842)	(2,891)
Ending balance	[2]	31,287	19,545	5,957
Gain (Loss) On Interest In Subsidiary [member]
Disclosure of classes of share capital [line items]
Beginning balance	[3]	(9,469)	(9,469)	(9,404)
ILP Plan fair value
Other	[3]	3,695
(Loss) gain from investments	[3]			(65)
Ending balance	[3]	(5,774)	(9,469)	(9,469)
Foreign Sales Hedge [member]
Disclosure of classes of share capital [line items]
Beginning balance	[4]	(6,893,066)	(7,626,515)	(6,358,242)
Foreign sales hedge
Exchange rate	[4]	(7,215,247)	(507,464)	(3,133,346)
Transfer to result	[4]	2,547,855	1,585,480	1,200,209
Income tax and social contribution	[4]	1,587,701	(344,567)	664,864
ILP Plan fair value
Ending balance	[4]	(9,972,757)	(6,893,066)	(7,626,515)
Cash Flow Hedge [member]
Disclosure of classes of share capital [line items]
Beginning balance	[4]	(218,589)	(257,508)	(145,267)
Fair value of Cash flow hedge
Change in fair value	[4]	(545,038)	7,150	(196,790)
Transfer to result	[4]	(47,223)	54,450	26,964
Income tax and social contribution	[4]	200,393	(21,703)	59,914
Fair value of cash flow hedge from jointly-controlled (RPR)	[4]	1,260	(978)	(2,329)
ILP Plan fair value
Ending balance	[4]	(609,197)	(218,589)	(257,508)
Defined Benefit Plans Actuarial Gain (Loss) [member]
Disclosure of classes of share capital [line items]
Beginning balance	[5]	(163,066)	(53,574)	(52,005)
Fair value of Cash flow hedge
Actuarial loss with post-employment benefits, net of taxes	[5]	(648)	(109,492)	(1,569)
ILP Plan fair value
Ending balance	[5]	(163,714)	(163,066)	(53,574)
Foreign Currency Translation Adjustment [member]
Disclosure of classes of share capital [line items]
Beginning balance	[6]	2,383,492	2,166,875	1,220,533
ILP Plan fair value
Foreign currency translation adjustment	[6]	3,054,126	220,228	946,342
(Loss) gain from investments	[6]		(50)
Effect of CPC 42 / IAS 29 - hyperinflation	[6]	8,077	(3,561)
Ending balance	[6]	5,445,695	2,383,492	2,166,875
Total Braskem Shareholders Interest [member]
Disclosure of classes of share capital [line items]
Beginning balance		(4,757,539)	(5,623,020)	(5,165,492)
Additional indexation
Realization by depreciation or write-off assets		(39,853)	(40,481)	(40,481)
Income tax and social contribution		13,551	13,764	13,764
Deemed cost of jointly-controlled investment
Realization by depreciation or write-off assets		(1,123)	(1,338)	(1,458)
Income tax and social contribution		382	455	496
Fair value adjustments
Accounts receivable		113	15	(449)
Foreign sales hedge
Exchange rate		(7,215,247)	(507,464)	(3,133,346)
Transfer to result		2,547,855	1,585,480	1,200,209
Income tax and social contribution		1,587,701	(344,567)	664,864
Fair value of Cash flow hedge
Change in fair value		(545,038)	7,150	(196,790)
Transfer to result		(47,223)	54,450	26,964
Income tax and social contribution		200,393	(21,703)	59,914
Fair value of cash flow hedge from jointly-controlled (RPR)		1,260	(978)	(2,329)
Actuarial loss with post-employment benefits, net of taxes		(648)	(109,492)	(1,569)
ILP Plan fair value
Change in fair value		16,452	19,415	9,297
Income tax and social contribution		(4,823)	(5,842)	(2,891)
Foreign currency translation adjustment		3,054,126	220,228	946,342
Other		3,695
(Loss) gain from investments			(50)	(65)
Effect of CPC 42 / IAS 29 - hyperinflation		8,077	(3,561)
Ending balance		(5,177,889)	(4,757,539)	(5,623,020)
Non-controlling Interest In Braskem Idesa [member]
Disclosure of classes of share capital [line items]
Beginning balance		(525,430)	(565,902)	(477,975)
Foreign sales hedge
Exchange rate		(111,363)	116,202	4,170
Transfer to result		117,932	66,787	59,143
Income tax and social contribution		(1,965)	(54,897)	(18,994)
Fair value of Cash flow hedge
Change in fair value		7,613	(23,078)	7,722
Transfer to result		(15,742)	16,752	10,386
Income tax and social contribution		2,439	1,898	(5,433)
Actuarial loss with post-employment benefits, net of taxes		1
ILP Plan fair value
Change in fair value		(415)	348	133
Foreign currency translation adjustment		(396,084)	(83,506)	(145,119)
(Loss) gain from investments			(34)	65
Ending balance		R$ 923014	R$ 525430	R$ 565902
[1]	Transfer to retained earnings as the asset is depreciated or written-off/sold.
[2]	For receivables classified as fair value through other comprehensive income, transfer to the income statement when attainment of jurisdiction or early liquidation. For the ILP Plan, Transfer to retained earnings according to the grace period of the plan.
[3]	Transfer to the income statement when divestment or transfer of control of subsidiary.
[4]	Transfer to the income statement when maturity, prepayment or loss of efficacy for hedge accounting.
[5]	Transfer to retained earnings when the extinction of the plan.
[6]	Transfer to the income statement when write-off of subsidiary abroad.

28 Equity (Details Narrative)

28 Equity (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Subscribed capital	R$ 8043222	R$ 8043222
Paid up capital stock	797,218,554
Description of transfer of profit to legal reserve	Under Brazilian Corporation Law, companies must transfer 5% of net profit for the year to a legal reserve until this reserve is equivalent to 20% of the paid-up capital.
Treasury shares [member] | LTI Program For Employees [member]
Disclosure of classes of share capital [line items]
Issue of shares	R$ 1721	R$ 8159

29 Earnings per share (Details)

29 Earnings per share (Details) - BRL (R$) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings per share [line items]
Profit (loss) for the year attributed to Company's shareholders	R$ 6691720	R$ 2540995	R$ 2827650
Distribution of 6% of unit price of common shares			273,840
Distribution of excess profits, by class			2,345,057
Reconciliation of income available for distribution, by class (numerator)	R$ 6691719	R$ 2540995	R$ 2827650
Weighted average number of shares, by class (denominator)	795,992,693	795,989,044	795,990,011
Common shares [member]
Earnings per share [line items]
Distribution of excess profits, by class			R$ 1331513
Reconciliation of income available for distribution, by class (numerator)	R$ 3797070	R$ 1441839	R$ 1605353
Weighted average number of shares, by class (denominator)	451,668,652	451,668,652	451,668,652
(Loss) earnings per share (in R$)	R$ 8.4068	R$ 3.1922	R$ 3.5543
Class A preferred shares [member]
Earnings per share [line items]
Distribution of priority dividends attributable to			R$ 208450
Distribution of excess profits, by class			1,013,544
Reconciliation of income available for distribution, by class (numerator)	R$ 2890444	R$ 1097559	R$ 1221994
Weighted average number of shares, by class (denominator)	343,823,811	343,820,162	343,808,699
(Loss) earnings per share (in R$)	R$ 8.4068	R$ 3.1922	R$ 3.5543
Class B preferred shares [member]
Earnings per share [line items]
Distribution of priority dividends attributable to			R$ 303
Reconciliation of income available for distribution, by class (numerator)	R$ 4205	R$ 1597	R$ 303
Weighted average number of shares, by class (denominator)	500,230	500,230	512,660
(Loss) earnings per share (in R$)	R$ 8.4068	R$ 3.1922	R$ 0.5910

29 Earnings per share (Details

29 Earnings per share (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class B preferred shares [member]
Earnings per share [line items]
Beginning balance		500,230	578,330
Conversion of preferred shares class "B" to "A"			(78,100)
Ending balance			500,230
Class B preferred shares [member] | Weighted average [member]
Earnings per share [line items]
Beginning balance		512,660	578,330
Conversion of preferred shares class "B" to "A"			(65,670)
Ending balance			512,660
Class A preferred shares [member]
Earnings per share [line items]
Beginning balance	343,823,073	343,814,914	343,775,864
Incentive long term plan payments with treasury shares	R$ 1721	R$ 8159
Conversion of preferred shares class "B" to "A"			39,050
Ending balance	343,824,794	343,823,073	343,814,914
Class A preferred shares [member] | Weighted average [member]
Earnings per share [line items]
Beginning balance	343,820,162	343,814,914	343,775,864
Incentive long term plan payments with treasury shares	R$ 738	R$ 5248
Conversion of preferred shares class "B" to "A"			32,835
Ending balance	343,823,811	343,820,162	343,814,914

30 Net revenues (Details)

30 Net revenues (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	R$ 58543494	R$ 52323525	R$ 57999866
Foreign market [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	69,569,301	62,284,161	68,663,320
Sales revenue [member] | Domestic market [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	43,256,810	38,333,817	42,144,075
Sales revenue [member] | Domestic market [member] | Revenue [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	43,356,596	38,391,132	42,189,365
Sales revenue [member] | Domestic market [member] | Rebates [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	(99,786)	(57,315)	(45,290)
Sales revenue [member] | Foreign market [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	26,312,491	23,950,344	26,519,245
Sales revenue [member] | Foreign market [member] | Revenue [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	26,362,457	23,998,067	26,577,433
Sales revenue [member] | Foreign market [member] | Rebates [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	(49,966)	(47,723)	(58,188)
Sales and services deductions [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	(11,025,807)	(9,960,636)	(10,663,454)
Sales and services deductions [member] | Domestic market [member] | Taxes [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	(10,726,404)	(9,704,712)	(10,219,138)
Sales and services deductions [member] | Domestic market [member] | Sales returns [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	(161,207)	(138,749)	(148,918)
Sales and services deductions [member] | Foreign market [member] | Taxes [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	(40,383)	(31,427)	(36,562)
Sales and services deductions [member] | Foreign market [member] | Sales returns [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	R$ 97813	R$ 85748	R$ 258836

30 Net revenues (Details 1)

30 Net revenues (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	R$ 58543494	R$ 52323525	R$ 57999866
BRAZIL
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	32,369,199	28,523,327	31,801,222
UNITED STATES
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	10,848,609	9,416,558	9,887,701
MEXICO
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	2,765,815	2,335,198	4,168,140
Argentina
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	1,267,967	1,104,044	1,166,191
Singapore
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	1,183,838	1,162,432	756,069
Germany
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	1,106,877	1,157,431	1,385,482
Italy
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	811,787	690,422	650,605
Switzerland
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	633,512	759,189	315,254
Japan
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	618,940	240,579	245,208
Luxembourg
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	592,777	526,768	546,524
Chile
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	544,329	610,454	686,646
China
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	496,920	542,209	884,233
Peru
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	471,847	551,967	540,495
Netherlands
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	432,897	516,409	293,315
Uruguay
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	405,946	359,049	155,571
South Korea
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	360,704	279,900	314,517
Sweden
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	310,984	296,601	270,062
Canada
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	297,756	201,635	290,453
Poland
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	285,714	200,563	260,449
Spain
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	282,362	344,433	329,458
Paraguay
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	254,255	194,859	214,959
France
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	247,062	225,986	135,094
United Kingdom
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	204,953	359,937	366,328
Bolivia
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	190,447	231,848	250,048
Taiwan
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	176,400	191,593	274,566
Colombia
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	174,381	200,370	363,497
Other [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	R$ 1207216	R$ 1099764	R$ 1447779

30 Net revenues (Details 2)

30 Net revenues (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	R$ 58543494	R$ 52323525	R$ 57999866
PE/PP [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	41,137,288	34,287,597	37,979,148
Ethylene, Propylene [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	3,600,276	3,743,581	4,283,709
Naphtha, condensate and crude oil [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	915,807	676,044	476,311
Benzene, toluene and xylene [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	3,051,752	2,503,667	2,785,400
PVC/Caustic Soda/EDC [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	3,134,617	2,692,778	3,167,390
ETBE/Gasoline [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	2,170,289	2,319,253	2,928,993
Butadiene [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	1,372,428	1,609,264	2,023,465
Cumene [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	636,635	723,469	909,409
Solvents [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	654,793	505,804	248,313
Other [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Net revenue	R$ 1869609	R$ 3262068	R$ 3197728

30 Net revenues (Details Narrat

30 Net revenues (Details Narrative) - One client [member]	12 Months Ended
	Dec. 31, 2020
Disclosure of disaggregation of revenue from contracts with customers [line items]
Percentage of entity's revenue	10.00%
Chemicals [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Percentage of entity's revenue	2.20%

31 Tax incentives (Details Narr

31 Tax incentives (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Tax Incentives
Percentage of tax reduction	75.00%
Realization period	10 years
ICMS tax incentives	R$ 68893	R$ 67796

32 Other income (expenses), n_3

32 Other income (expenses), net (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
PIS and COFINS credits - exclusion of ICMS from the calculation basis [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	R$ 310557		R$ 1904206	R$ 235919
Tax credits recovery [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	219,254		3,094	46,179
Fixed assets disposal results [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net			11,140	93,814
Fine on supply contract of raw material, net [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	41,134	[1]	375,020	386,020
Other [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	179,804		114,974	265,290
Other Income [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	750,749		2,408,434	1,027,222
Provision for damages - Alagoas [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(6,901,828)		(3,383,067)
Provision for repairing environmental damage [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(306,275)		(141,536)	(89,396)
Shutdowns and other plants expenses [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(67,735)		(108,192)	(91,380)
Fine on sales contracts [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(42,322)		(104,179)	(49,487)
Allowance for judicial claims, net of reversals [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(4,008)		(136,135)	(83,280)
Provision for losses on the fixed asset [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(51,590)		(158,320)	(44,420)
Other expenses [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	(564,863)		(415,513)	(196,750)
Other expenses [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Other income (expenses), net	R$ 7938621		R$ 4446942	R$ 554713
[1]	The contractual penalty charged from a supplier for failing to supply feedstock to the subsidiary Braskem Idesa at December 31, 2019 is R$335,281 (R$338,125 in 2018).

32 Other income (expenses), n_4

32 Other income (expenses), net (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Braskem idsea [member]
DisclosureOfOtherIncomeExpensesNetLineItems [Line Items]
Contractual penalty	R$ 335281	R$ 338125

33 Financial results (Details)

33 Financial results (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
DisclosureOfFinancialResultsLineItems [Line Items]
Financial income	R$ 600184	R$ 850554	R$ 589052
Financial expenses	(4,913,365)	(3,882,785)	(3,007,551)
Exchange rate variations, net	(5,298,711)	(1,724,520)	(2,256,983)
Finance income (cost)	(9,611,892)	(4,756,751)	(4,675,482)
Interest income [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial income	481,059	708,542	530,007
Other financial income [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial income	119,125	142,012	59,045
Interest expenses [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(2,928,803)	(2,191,765)	(2,084,780)
Monetary variations on fiscal debts [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(138,410)	(232,612)	(33,429)
Discounts granted [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(81,920)	(80,404)	(141,223)
Loans transaction costs [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(172,269)	(465,000)	(89,982)
Adjustment to present value [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(225,889)	(348,930)	(296,065)
Interest expense on leases [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(164,166)	(137,903)
Losses on derivatives [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(809,150)	(115,050)	(58,102)
Other financial expenses [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Financial expenses	(392,758)	(311,121)	(303,970)
Financial assets [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Exchange rate variations, net	336,527	(31,137)	1,268,741
Financial liabilities [member]
DisclosureOfFinancialResultsLineItems [Line Items]
Exchange rate variations, net	R$ 5635238	R$ 1693383	R$ 3525724

34 Expenses by nature and fun_3

34 Expenses by nature and function (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Nature [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	R$ 58595988	R$ 52180060	R$ 49718760
Nature [member] | Raw materials other inputs [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(37,913,921)	(37,380,310)	(38,889,949)
Nature [member] | Personnel expenses [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(3,074,305)	(3,004,762)	(2,412,118)
Nature [member] | Outsourced services [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(2,219,413)	(3,242,373)	(2,306,048)
Nature [member] | Depreciation and amortization [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(4,048,081)	(3,632,265)	(2,990,577)
Nature [member] | Freights [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(2,321,740)	(2,204,453)	(2,275,375)
Nature [member] | Costs of idle industrial plants [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(518,528)	(309,742)	(138,242)
Nature [member] | Provision - geological event in Alagoas [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(6,901,828)	(3,383,067)
Nature [member] | PIS and COFINS credits - exclusion of ICMS from the calculation basis [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	310,557	1,904,206	235,919
Nature [member] | Other general and administrative expenses [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(1,908,729)	(927,294)	(942,370)
Function [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(58,595,988)	(52,180,060)	(49,718,760)
Function [member] | Other general and administrative expenses [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	750,749	2,408,434	1,027,222
Function [member] | Cost of products sold [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(47,331,414)	(45,879,118)	(46,576,657)
Function [member] | Selling and distribution [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(1,852,055)	(1,783,455)	(1,689,179)
Function [member] | (Loss) reversals for impairment of trade accounts receivable [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(55,252)	(7,069)	87,008
Function [member] | General and administrative [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(1,918,747)	(2,224,180)	(1,793,185)
Function [member] | Research and development [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	(250,648)	(247,730)	(219,256)
Function [member] | Other expenses [member]
DisclosureOfExpensesByNatureAndFunctionLineItems [Line Items]
Expenses	R$ 7938621	R$ 4446942	R$ 554713

35 Segment information (Details

35 Segment information (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Disclosure of operating segments [line items]
Net sales revenue	R$ 58543494		R$ 52323525		R$ 57999866
Cost of products sold	(47,331,414)		(45,879,118)		(46,576,657)
Gross profit	11,212,080		6,444,407		11,423,209
Selling, general and distribuition expenses	(4,076,702)		(4,262,434)		(3,614,612)
Results from equity investments	(19,398)		10,218		(888)
Other operating income (expenses), net	(7,187,872)		(2,038,508)		472,509
Operating profit (loss)	(71,892)		153,683		8,280,218
Corporate unit [member]
Disclosure of operating segments [line items]
Net sales revenue
Cost of products sold
Gross profit
Selling, general and distribuition expenses	(1,493,479)	[1]	(1,533,590)	[2]	(1,807,033)	[3]
Results from equity investments
Other operating income (expenses), net	359,071	[1]	1,773,267	[2]
Operating profit (loss)	(1,134,408)	[1]	239,677	[2]	(1,336,792)	[3]
Reporting segments [member]
Disclosure of operating segments [line items]
Net sales revenue	59,433,852		52,238,264		58,212,611
Cost of products sold	(47,910,490)		(45,967,468)		(47,425,291)
Gross profit	11,523,362		6,270,796		10,787,320
Selling, general and distribuition expenses	(2,629,772)		(2,729,808)		(1,798,715)
Other operating income (expenses), net	(7,529,558)		(3,851,078)		311,898
Operating profit (loss)	1,364,032		(310,090)		9,300,503
Reporting segments [member] | Brazil [member]
Disclosure of operating segments [line items]
Net sales revenue	40,794,387		39,142,561		42,078,175
Cost of products sold	(32,498,003)		(35,245,941)		(35,271,203)
Gross profit	8,296,384		3,896,620		6,806,972
Selling, general and distribuition expenses	(1,471,722)		(1,852,908)		(996,754)
Results from equity investments
Other operating income (expenses), net	(7,082,604)		(4,151,901)		(78,912)
Operating profit (loss)	(257,942)		(2,108,189)		5,731,306
Reporting segments [member] | USA and Europe [member]
Disclosure of operating segments [line items]
Net sales revenue	14,638,660		10,044,263		11,725,622
Cost of products sold	(12,337,486)		(8,217,515)		(9,195,745)
Gross profit	2,301,174		1,826,748		2,529,877
Selling, general and distribuition expenses	(721,191)		(525,701)		(464,567)
Results from equity investments
Other operating income (expenses), net	(82,695)		(23,859)		68,734
Operating profit (loss)	1,497,288		1,277,188		2,134,044
Reporting segments [member] | Mexico [member]
Disclosure of operating segments [line items]
Net sales revenue	4,000,805		3,051,440		4,408,814
Cost of products sold	(3,075,001)		(2,504,012)		(2,958,343)
Gross profit	925,804		547,428		1,450,471
Selling, general and distribuition expenses	(436,859)		(351,199)		(337,394)
Results from equity investments
Other operating income (expenses), net	(364,259)		324,682		322,076
Operating profit (loss)	124,686		520,911		1,435,153
Other segments [member]
Disclosure of operating segments [line items]
Net sales revenue	302,374		296,285		292,435
Cost of products sold	(188,350)		(188,335)		(173,608)
Gross profit	114,024		107,950		118,827
Selling, general and distribuition expenses	63,874		40,306		(33,728)
Results from equity investments	(19,398)		10,218		(888)
Other operating income (expenses), net	(320)		4,175		(103)
Operating profit (loss)	158,180		162,649		84,108
Braskem consolidated be for eliminations and reclassifications [member]
Disclosure of operating segments [line items]
Net sales revenue	59,736,226		52,534,549		58,505,046
Cost of products sold	(48,098,840)		(46,155,803)		(47,598,899)
Gross profit	11,637,386		6,378,746		10,906,147
Selling, general and distribuition expenses	(4,059,377)		(4,223,092)		(3,639,476)
Results from equity investments	(19,398)		10,218		(888)
Other operating income (expenses), net	(7,170,807)		(2,073,636)		782,036
Operating profit (loss)	387,804		92,236		8,047,819
Eliminations and reclassifications [member]
Disclosure of operating segments [line items]
Net sales revenue	(1,192,732)		(211,024)		(505,180)
Cost of products sold	767,426		276,685		1,022,242
Gross profit	(425,306)		65,661		517,062
Selling, general and distribuition expenses	(17,325)		(39,342)		24,864
Results from equity investments
Other operating income (expenses), net	(17,065)		35,128		(309,527)
Operating profit (loss)	R$ 459696		R$ 61447		R$ 232399
[1]	Includes the amount of R$310,557 related to PIS and COFINS tax credits - exclusion of ICMS from the calculation base (Note 10.c).
[2]	Includes the amount of R$1,904,206 million related to PIS and COFINS tax credits - exclusion of ICMS tax from the calculation base (Note 10.c).
[3]	Includes the amount of R$501.357 (R$265,438 in ''Net revenue'' and R$235,919 in ''Other operating income (expenses), net'') related to PIS and COFINS tax credits - exclusion of ICMS from the calculation basis (Note 10.c).

35 Segment information (Detai_2

35 Segment information (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Property, plant and equipment and intangible assets	R$ 38757840	R$ 35077269
Reporting segments [member]
Disclosure of operating segments [line items]
Property, plant and equipment and intangible assets	38,434,223	34,736,147
Reporting segments [member] | Brazil [member]
Disclosure of operating segments [line items]
Property, plant and equipment and intangible assets	17,299,352	17,863,336
Reporting segments [member] | USA and Europe [member]
Disclosure of operating segments [line items]
Property, plant and equipment and intangible assets	7,242,262	4,852,760
Reporting segments [member] | Mexico [member]
Disclosure of operating segments [line items]
Property, plant and equipment and intangible assets	13,892,609	12,020,051
Unallocated amounts [member]
Disclosure of operating segments [line items]
Property, plant and equipment and intangible assets	R$ 323617	R$ 341122

35 Segment information (Detai_3

35 Segment information (Details Narrative) - Corporate unit [member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of operating segments [line items]
PIS and COFINS tax credits	R$ 310557	R$ 1904206	R$ 501357
Net revenue			265,438
Other operating income (expenses), net			R$ 235919

36 Insurance coverage (Unaudi_3

36 Insurance coverage (Unaudited) (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2020BRL (R$)
Disclosure of types of insurance contracts [line items]
Amount insured (US$)	R$ 36320000
Amount insured (R$)	R$ 188744000	[1]
BRAZIL
Disclosure of types of insurance contracts [line items]
Maturity	October 8, 2021
Maximum indemnity limit (US$)	R$ 3500000
Maximum indemnity limit (R$)	18,188,000
Amount insured (US$)	27,961,000
Amount insured (R$)	R$ 145305000	[1]
United states and germany [member]
Disclosure of types of insurance contracts [line items]
Maturity	October 8, 2021
Maximum indemnity limit (US$)	R$ 655000
Maximum indemnity limit (R$)	3,404,000
Amount insured (US$)	2,680,000
Amount insured (R$)	R$ 13927000	[1]
MEXICO
Disclosure of types of insurance contracts [line items]
Maturity	October 8, 2021
Maximum indemnity limit (US$)	R$ 2742000
Maximum indemnity limit (R$)	14,249,000
Amount insured (US$)	5,679,000
Amount insured (R$)	R$ 29512000	[1]
[1]	Amount for replacement of assets, inventories and loss of profits;

37 Subsequent events (Details N

37 Subsequent events (Details Narrative) - Events after reporting period [member] - BRL (R$) R$ in Thousands	Jan. 06, 2021	Mar. 31, 2021
Disclosure of non-adjusting events after reporting period [line items]
Payment of compensation for losses and damages		R$ 222100
Face value		500,000
Cash Balance		R$ 1300000
Description of certified as final and unappealable		In February and March 2021, lawsuits of the Company involving the exclusion of ICMS tax from the PIS/COFINS tax basis were certified as final and unappealable.
Description of judicial settlements	On January 6, 2021, judicial settlements were approved for the dismissal of the Public-Interest Civil Action of Reparation for Residents (Note 26.1(i)) and Public-Interest Civil Action for Socio-environmental Reparation (Note 26.1(ii)) related to the Company. As provided for in the Agreement to dismiss the Public-Interest Civil Action on Socio-Environmental Reparation, the MPE determined, on January 21, 2021, the dismissal of the Investigation related to urban damages (Note 26.1(iv)), with the consequent filing of an administrative procedure to monitor and supervise the compliance with said Agreement.
First quarter [member]
Disclosure of non-adjusting events after reporting period [line items]
Nominal value		R$ 1200000