THIRD AMENDMENT
                                   TO
                        JOINT VENTURE AGREEMENT


     This THIRD AMENDMENT to JOINT VENTURE AGREEMENT (this "Amendment")
is entered into and effective as of March 31, 2000, by and among Solutia
Inc. ("Solutia"), and FMC Corporation ("FMC").


                              RECITALS:
                              --------

A.   FMC and Solutia are parties to that certain Joint Venture
     Agreement dated as of April 29, 1999, as amended by the First
     Amendment to Joint Venture Agreement dated as of December 30,
     1999, and as amended by the Second Amendment to Joint Venture
     Agreement dated as of February 10, 2000 (as amended, the "JVA").

B.   FMC and Solutia desire to amend the JVA on the terms and
     conditions contained herein.

                              AMENDMENT
                              ---------

Therefore, in consideration of the mutual agreements herein and other
sufficient consideration, the receipt of which is hereby acknowledged,
FMC and Solutia, intending to be legally bound, hereby amend the JVA as
follows:

1.  DEFINITIONS.  Capitalized terms used and not otherwise defined
herein have the meanings given them in the JVA.

2.  EFFECTIVE DATE.  For all purposes, FMC and Solutia hereby agree that
the "Effective Date" is and shall be April 1, 2000.

3.  AMENDMENTS TO EXISTING PROVISIONS OF THE JOINT VENTURE AGREEMENT.

     3.1.  APPENDIX 1.15 (FIELD OF AGREEMENT) TO THE JVA.

     At the end of Section I of Appendix 1.15, after the phrase
     "Phosphorus Chemicals", the phrase "and Non-Phosphorus Containing
     Detergents" is hereby added.

     In addition, a new Section VI is hereby added to Appendix 1.15 as
     follows:

     "VI.  Non-Phosphorus Containing Detergents shall mean all patents
     and patent applications listed in Attachment C to this Appendix;
     trade secrets, technology and know-how directly related thereto,
     and all rights related to the foregoing, and with respect to
     Solutia, subject to that certain license agreement dated as of
     December 16, 1998 by and between Solutia Inc. and Nippon Shokubai
     Co. Ltd. (the "Builder U License") for detergent uses of Builder U
     (polymeric acetal carboxylate or derivative thereof), and patent
     rights and know-how and trade secrets related thereto; provided,
     however the Builder U License shall be assigned to the Joint
     Venture, but Solutia shall retain the right to receive all royalty
     payments under the Builder U License and any such royalty payments
     received by the Joint Venture shall be promptly remitted to
     Solutia."





     3.2.  PARTIES IN INTEREST IN THE JOINT VENTURE.
     The first sentence of Section 5.1 of the JVA is deleted and
     replaced with the following:

     "Except as otherwise expressly set forth herein, the Parties shall
     each have a direct or indirect fifty percent (50%) interest in the
     Joint Venture, and control of the Joint Venture shall be shared
     equally between the Parties."

     3.3.  APPENDIX 7.1.  Appendix 7.1 is deleted and replaced with the
     new Appendix 7.1 attached hereto.

     3.4.  SEVERANCE.
     Section 13.4 of the JVA is deleted in its entirety and replaced
     with the following:

     "13.4.  In any country, including the United States, costs of
     redundancies of marketing, administrative, and technical personnel
     resulting from the formation of the Joint Venture shall be for the
     account of FMC or Solutia, as the case may be (collectively, "MAT
     Severance Costs"), with each of Solutia and FMC paying its own MAT
     Severance Costs.  Each party shall indemnify the Joint Venture and
     each other against any such MAT Severance Costs."

     3.5.  OPEB.
     Section 13.6 of the JVA is deleted in its entirety and replaced
     with the following:

     "13.6.  The Joint Venture will reimburse Solutia for all costs
     incurred in connection with claims by the JV Retirees for coverage
     or benefits under any Solutia Plan and will pay an equal amount to
     FMC, provided that the Joint Venture shall not be required to
     reimburse Solutia for any costs to the extent such costs result
     from liabilities which exceed in the aggregate $30 million.
     "Solutia Plan" shall mean any medical or life insurance plan for
     the benefit of any JV Retiree sponsored by (i) Solutia; or (ii)
     Monsanto Company ("Monsanto") but only to the extent Solutia is
     responsible for benefits and costs thereunder pursuant to the
     Employee Benefits and Compensation Allocation Agreement between
     Monsanto and Solutia dated as of September 1, 1997.  Solutia
     agrees that it will not amend any Solutia Plan if such amendment
     would increase the Joint Venture's cost under this section, except
     that it may amend the plan if ordered to do so by a court with
     jurisdiction to make such order, including without limitation, an
     order issued by the court in Solutia v. Forsberg, et al. and
     related cases pending in the Northern District of Florida
     approving a class action settlement.  "JV Retirees" shall mean (i)
     individuals (and their eligible dependents) who, prior to the
     Effective Date, were employees of Solutia or Monsanto's (or
     Monsanto's predecessors) respective Phosphorus Chemicals business
     and who, on the Effective Date, are no longer employed by Solutia
     (including those individuals on long-term disability), (ii) the
     active employees as of the Effective Date (and their eligible
     dependents), including employees on short term and long term
     disability, of Solutia's Phosphorus Chemicals business who do not
     join the Joint Venture for any reason and who terminate employment
     with Solutia for any reason within 6 months following the
     Effective Date, (iii) the active employees (and their eligible
     dependents) of Solutia's Phosphorus Chemicals business who on or
     after the Effective Date become former employees of Solutia and
     become employees of the Joint Venture and subsequently terminate
     employment for any reason with the Joint Venture, and (iv) without
     duplication of the foregoing, the active employees as of the
     Effective Date (and their eligible dependents) at Solutia's
     Augusta plant who subsequently terminate employment with Solutia,
     the Joint Venture, or any purchaser of the Augusta plant for any
     reason.


                              2



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     Each year Solutia will cause the Solutia Plan actuary or other
     appropriate person to prepare a statement of the liabilities as of
     January 1 and the expected costs for the year associated with the
     JV Retirees.  Solutia will invoice the Joint Venture annually on
     or about July 1 of each year for the estimated costs described in
     this Section for such year and for any costs associated with
     determining the liabilities and costs, providing appropriate
     documentation.  Such invoice shall also include a statement of the
     actual costs for the preceding year (if any) and reflect an
     appropriate adjustment for the amount by which the previous year's
     estimated payment differed from the actual costs.  The Joint
     Venture will pay such invoice within 30 days of the date of the
     invoice.  Solutia will forward a copy of its invoice to FMC
     simultaneously with forwarding a copy of the invoice to the Joint
     Venture.  FMC will invoice the Joint Venture for the same amount
     as appears on the Solutia invoice and the Joint Venture will pay
     such FMC invoice within 30 days of the date of such invoice.

     At Solutia's option any time after the date which is six months
     after the Effective Date, Solutia may cause coverage under any
     Solutia Plan to be terminated for JV retirees and require the
     Joint Venture to adopt a plan providing for identical coverage for
     the JV retirees (the "JV Plan") and to maintain the JV Plan for so
     long as Solutia maintains a plan providing such coverage for its
     retirees, provided that Solutia may not require the Joint Venture
     to adopt or maintain any JV Plan to the extent the liability for
     such plan exceeds $30 million.  The Joint Venture may require
     Solutia to provide the administrative services necessary for the
     JV Plan, provided it agrees to reimburse Solutia for the costs of
     providing such services.  To the extent Solutia exercises the
     option in this Section, (i) the Joint Venture's obligation to
     reimburse Solutia set forth above shall be eliminated from the
     effective date of the adoption of the JV Plan, (ii) FMC shall have
     the option of terminating coverage under its plans for a group of
     retirees to the extent necessary to provide for transfer of an
     equal liability to the JV as that which would result from the
     adoption of the JV plan, and (iii) if FMC elects not to so
     terminate such coverage, the Joint Venture shall be obligated to
     pay FMC an amount equal to the costs incurred by the JV retirees
     for coverage or benefits under the JV Plan and any related
     administrative costs.

     On the Effective Date, the Joint Venture will assume an equal
     amount of liabilities from FMC and Solutia for: (i) incurred but
     not reported employee and retiree medical and dental expenses, and
     (ii) FAS 112 liability associated with each Group's Phosphorus
     Chemicals business (and if necessary to equalize such amounts,
     from other businesses of a party that such party no longer owns)."

     3.6.  SECTION 15.2.

     The second sentence of Section 15.2(c)(i) is deleted and replaced
     with the following:

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                              3



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

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     3.7.  THIRD PARTY BENEFICIARIES.
     Section 23.1 of the JVA is deleted in its entirety and replaced
     with the following:

     "23.1.  THIRD PARTIES.  Except as expressly stated herein with
     respect to members of each Group, no person or entity not a party
     to this Agreement (including, without limitation, any employee of
     either Group or the Joint Venture) shall be a third-party
     beneficiary of any provision of this Agreement, and nothing
     contained herein shall be construed or deemed to confer any
     benefit or right upon any third party. Each of FMC and Solutia
     shall be a third party beneficiary of each document or agreement
     between the Joint Venture and any member of the other party's
     Group executed prior to the Effective Date, on the Effective Date
     or after the Effective Date, whether or not any such document or
     agreement specifically provides for such third party beneficiary
     status for so long as such party (or it successors and assigns)
     owns an interest in the Joint Venture."

     3.8.  ARTICLE 15.2 (c)(iv).

     The reference in Article 15.2 (c)(iv) to "15.3 (c)(ii)" is deleted
     and replaced with "15.2 (c)(ii)."

4.  NEW SECTIONS TO THE JOINT VENTURE AGREEMENT.
     4.1.  BRAZIL.  A new paragraph is added to the end of Section 24
     of the JVA as follows:

     "Solutia shall vote its interest in Solutia Participacoes, Ltda.,
     which will be the Joint Venture's Subsidiary and which will be
     renamed following the Effective Date, in precisely the same manner
     as the Joint Venture votes its interest in Solutia Participacoes,
     Ltda.  Solutia will not take any action with respect to its
     interest in Solutia Participacoes, Ltda., such as exercising any
     dissenter's rights, minority rights, or similar rights, that would
     be contrary to the interests of the Joint Venture in Solutia
     Participacoes, Ltda.  In addition, if, solely due to Solutia's
     restructuring of its Brazilian Phosphorus Chemicals operations as
     described on Appendix 24, a sales tax or other transfer or ad
     valorem tax (collectively, "Sales Tax") is owing that would not
     otherwise be payable if Solutia transferred its Brazilian
     Phosphorus Chemicals assets (including the Fosbrasil Interest)
     into the Joint Venture without any such restructuring, Solutia
     shall pay the entire amount of any such Sales Tax.  In addition,
     any liability for income tax owing as a result of the
     restructuring of Solutia's Brazilian Phosphorus Chemicals
     operations as described on Appendix 24 shall be allocated in
     accordance with Section 20.2 hereof."

     4.2.  CARTERET.  A new Section 15.11(c) is added as follows:


                              4



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     "Notwithstanding the foregoing provisions of this Article
     15.11(a), all costs and expenses incurred in connection with the
     closure, mothballing, dismantling, removal or demolition down to
     foundation level of the machinery, equipment and structures
     located at the Carteret, New Jersey location that has been
     mothballed or idled or are obsolete as of the Effective Date shall
     be paid as follows: (i) the first [**********] shall be paid
     solely by the Joint Venture, and (ii) any and all amounts in
     excess of [**********] shall be paid solely by FMC or FMC shall
     reimburse the Joint Venture for all such amounts.  The Board of
     Managers of the Joint Venture must approve any expenditures
     described in this Article 15.11(c)."

     4.3.  SECTION 25.3 DISPUTE RESOLUTION.

     A new Section 25.3 is hereby added as follows:

     "25.3.  The Parties agree that in lieu of the procedures set
     forth in Article 25.1, the dispute resolution procedure for
     controversies, claims or disputes concerning matters related to
     the operations of the Joint Venture that may affect compliance of
     the Pocatello facility with the Pocatello Consent Decree as
     contemplated under the terms of Article 15.2(c) (the "Consent
     Decree Matters") shall be as set forth in this Article 25.3.  At
     the request of either party in a written notice to the other
     party's appointees to the Board, the Parties agree to negotiate in
     good faith to resolve expeditiously any Consent Decree Matters.
     Each party shall name a single representative from among its
     appointees to the Board to resolve the controversy.  Unless
     otherwise specified in writing, such representatives shall be
     Robert I. Harries for the FMC Group and Dennis Cavner for the
     Solutia Group.  If, after a period of ten (10) business days from
     the date of such notice, such representatives cannot resolve the
     Consent Decree Matter under consideration, then any such matter
     not so resolved shall be referred (by written notice by either
     party to the other party's general counsel and the other party's
     representatives to the Board) to the Group Heads, who shall have
     an initial meeting with respect to such matters within ten (10)
     business days after the date of such referral notice, and who
     shall thereafter negotiate in good faith with each other for an
     additional ten (10) business day period following the date of such
     initial meeting in an attempt to resolve any open issues.  If the
     Group Heads are unable to resolve such issues within such ten-
     business-day period, the Parties shall be free to exercise their
     rights and remedies as contemplated in Articles 25.1 and 25.2
     above;  provided, however, the Parties agree that during the
     period in which any Consent Decree Matters have not been resolved,
     FMC shall have the right to give, and Joint Venture shall be
     obligated to comply with, reasonable instructions to ensure that
     the Pocatello facility complies with the Pocatello Consent Decree;
     provided, however, the parties agree that during the period in
     which any Consent Decree Matters have not been resolved, FMC shall
     have the right to suggest recommendations to Joint Venture, which
     Joint Venture shall, unless Joint Venture reasonably determines
     such recommendations are unreasonable or unworkable, accept and
     implement such recommendations."

     4.4.  MISCELLANEOUS SECTION.
     A new Section "SECTION 27.  MISCELLANEOUS" is hereby added to the
     JVA.

     4.5.  BUILDER U.
     A new Section 27.1 is hereby added to the JVA:

     "27.1.  BUILDER U.  With respect to the Builder U License (as
     defined in Appendix 1.15), the Joint Venture shall not receive any
     royalty or other payments thereunder and any royalty payments
     received by the Joint Venture shall be promptly remitted to
     Solutia.  Furthermore, with respect to the Builder U License,
     Solutia shall indemnify and hold the Joint Venture harmless from
     any


                              5



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     losses, damages, expenses and claims arising under the Builder U
     License.  The Joint Venture shall fully cooperate with Solutia in
     connection with the Builder U License, including, with respect to
     assuring the licensee's performance thereunder, cooperating with
     Solutia in connection with the foregoing indemnity given by
     Solutia, the maintenance of the licensed patents, and the defense
     of the licensee against patent infringement pursuant to the
     Builder U License."

     4.6.  SALE OF AUGUSTA AND LAWRENCE P2S5 UNIT.
     A new Section 27.2 is hereby added to the JVA:

     "27.2.  SALE OF AUGUSTA AND LAWRENCE P2S5 UNIT.  Notwithstanding
     anything contained herein to the contrary, (i) with respect to the
     sale of the Augusta, Georgia facility by the Joint Venture, to the
     extent any representations and warranties contained in any sale
     documents are broader than the representations and warranties made
     by Solutia to the Joint Venture in the Asset Transfer Agreement
     between Solutia and the Joint Venture, Solutia shall indemnify and
     hold harmless the Joint Venture to the extent of any such broader
     representations and warranties without regard to any deductible or
     de minimis as set forth in Sections 14.1(a) and 14.1(b) hereof,
     and (ii) with respect to the sale of the Lawrence, Kansas P2S5
     facility by the Joint Venture, to the extent any representations
     and warranties contained in any sale documents are broader than
     the representations and warranties made by FMC to the Joint
     Venture in the Asset Transfer Agreement between FMC and the Joint
     Venture, FMC shall indemnify and hold harmless the Joint Venture
     to the extent of any such broader representations and warranties
     without regard to any deductible or de minimis as set forth in
     Sections 14.1(a) and 14.1(b) hereof."

     4.7.  [***** *****] AGREEMENTS.
     A new Section 27.3 is hereby added to the JVA:

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     4.8.  P4 PENALTY.
     A new Section 27.4 is hereby added to the JVA:

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                              6



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

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                              7



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)


     4.9.  P4 SALES.
     A new Section 27.5 is hereby added to the JVA:

     "27.5.  P4 SALES BY SOLUTIA. In the event that the Solutia Group
     sells, transfers or otherwise conveys any business of the Solutia
     Group that consumes or is dependent upon elemental phosphorus
     (P4), notwithstanding the terms of Section 8.3 hereof, if Solutia
     does not partially assign its rights under the Supply Agreement or
     the New Supply Agreements, as the case may be, Solutia shall be
     permitted to sell or otherwise transfer elemental phosphorus (P4)
     to any purchaser or transferee of any such business of the Solutia
     Group that consumes or is dependent upon elemental phosphorus
     (P4)."

     4.10.  CARTERET ISRA FILING.
     A new Section 27.6 is hereby added to the JVA:

     "27.6.  ISRA. FMC and Solutia agree that the Joint Venture's
     execution of a Remediation Agreement Application under ISRA with
     respect to FMC's Carteret, New Jersey site, and the Joint
     Venture's execution of any other documents in connection therewith
     or in connection with any ISRA remediation plan prepared by or on
     behalf of FMC, shall not modify or alter in any respect the terms
     of Section 15 of the JVA, and Section 15 shall remain fully
     applicable to Carteret.  In addition, FMC shall hold Solutia and
     the Joint Venture harmless against any liability that the Joint
     Venture or Solutia may incur if any cost estimates prepared by FMC
     in connection with any ISRA remediation plan prepared by or on
     behalf of FMC are erroneous in any respect, but the foregoing
     provisions of this sentence shall not modify or alter in any
     respect the terms of Section 15 of the JVA, and Section 15 shall
     remain fully applicable to Carteret."

     4.11.  COKE.
     A new Section 27.7 is hereby added to the JVA:

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     ***** **** ****** ******** ******* *** *** *** ***** ******* ****
     *** **** *********** *** ********* ********* ** *** ***** *****
     **** ****** ******** **** ********** * ****** **** ** **** ****
     **** ************  ** *** ***** ** * ********* *********** ***
     ****** **** ** ***** *** *** ***** ***** *** ********** ***
     ******* ** *** *** ************ ********** **** ******* **
     ********* *** **** **** *** ***** ******* *** ** ****** ***
     ********* ***** ** *** ***** ******* ***** *** ** **** **********
     ********* ******* *********** ** *** **** *** ******* **** ** ***
     *** **** ****** ********* *** *** ******* ******* ******** **
     ***** ***** ******** ** *** **** *** ******* **** ** *** *** ****
     ****** ********* *** *** *** ******* ******** ******** ** *****
     ***** ******** ** ** *** **** *** ******* **** ** *** ***** ****
     ****** ********* ******** ** ******* *** *** ******* *** ***
     ********** **** ***** ********** *** ******* ** **** **********
     ********** ** **** ********** ******* ** **** ***** *** *** ****
     ********* ** **** ********** ******* **** ** ***** ********** **
     ***** ** ****** *** ******* **** *** ** ***** ** *** ***** *******
     ***** *** ** **** ********* **** ********* ** *** ***** *** ***
     **** ********** ** **** ********* ** ** *** ******* ********
     ********* ** **** **** **** ************* ** ***** ********
     ********* ** **** **** **** ******* ***** *** ********* ********
     ** *** ***** ******* ****** ** *** ***** ** * **** ** *** ** *


                              8



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     ******* ** *** *** ******* ********* ******** ** *** ***** *******
     ** * ***** ***** ** ** *** *** ***** ***** *** * *** *********
     ******** ** *** ***** ******** *** **** ** ****** *** *****
     ******* ** ******* * ********* **** *********** *******
     *********** *** ************** ** ********** *** *** **** ** ****
     *** ******* ******** ************ ** *** ********* ** **********]

     4.12.  P2S5.
     A new Section 27.8 is hereby added to the JVA:

     "27.8.  P2S5 OFF-SPEC INVENTORY. The Parties hereto acknowledge
     that certain of the inventory located at the FMC Group's Lawrence
     facility and located at the Solutia Group's Krummrich facility at
     the Effective Date is Off-Spec Inventory.  As used in this
     paragraph "Off-Spec Inventory" shall mean any and all inventory of
     P2S5 existing at the Effective Date, that either (i) was not
     accepted by such facilities' customers upon delivery, or (ii) was
     withheld from shipment due to the failure of such P2S5 inventory
     to meet then-applicable specifications for finished product.
     Each of the FMC Group and the Solutia Group shall transfer an
     equal amount (in pounds) of Off-Spec Inventory to the Joint
     Venture on the Effective Date, which such amounts shall be valued
     at the raw material value and included on such party's Closing
     Balance Sheet.

     Any excess in Off-Spec Inventory above such equal amount shall be
     retained by the party holding such excess on the Effective Date
     (such party being, the "Retaining Party").  After the Effective
     Date, the Joint Venture shall provide storage, at the Retaining
     Party's expense, for the Off-Spec Inventory of the Retaining Party
     until such time as such Off-Spec Inventory is either reworked or
     disposed of as set forth in this Section.  The Retaining Party
     shall be responsible for insuring such Off-Spec Inventory and
     shall have all risk of loss and liability associated therewith
     until disposed of or sold as provided for in this Section.

     After the Effective Date, the Parties hereto agree to cause the
     Joint Venture to use its commercially reasonable efforts to assist
     the Retaining Party to dispose of any Off-Spec Inventory by
     reworking such Off-Spec Inventory at the Joint Venture's Krummrich
     P2S5 facility.  If such Off-Spec Inventory is successfully
     reworked into a product saleable to the Joint Venture's customers,
     the Joint Venture shall purchase such reworked Off-Spec Inventory
     from the Retaining Party by paying to the Retaining Party an
     amount equal to the Krummrich Facility's standard whole cost of
     P2S5, less the Joint Venture's costs and out-of-pocket expenses
     related to the reworking of such material, including any related
     freight costs paid or incurred by the Joint Venture.

     In the case of Off-Spec Inventory that either cannot be or has
     not been successfully reworked, the Joint Venture shall use
     commercially reasonable efforts to seek buyers for the remaining
     Off-Spec Inventory held by the Retaining Party.  If such sale is
     in the best interests of both the Retaining Party and the Joint
     Venture, the Joint Venture shall sell such salable Off-Spec
     Inventory on behalf of the Retaining Party and pay the Retaining
     Party an amount equal to the net revenue realized on such sale
     less the Joint Venture's costs and out-of-pocket expenses related
     to sale and/or delivery of such material including, without
     limitation, any freight costs paid or incurred by the Joint
     Venture.

     The Joint Venture shall also use commercially reasonable efforts
     to find alternative uses for Off-Spec Inventory that cannot be
     reworked or resold as P2S5 as provided above, including without
     limitation, converting such material into salable Phosphorus
     Chemicals.  If the Joint Venture is successful in converting such
     Off-Spec Inventory into salable Phosphorus Chemicals, the Joint
     Venture shall sell such products on behalf of the Retaining Party
     and pay the Retaining Party an


                              9



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     amount equal to the net revenue realized on such sale less the
     Joint Venture's costs and out-of-pocket expenses, including,
     without limitation, any tolling conversion fees paid to third
     parties and freight costs paid or incurred by the Joint Venture.

     If after exercising its commercially reasonable efforts to convert
     the Off-Spec Inventory into salable product, the Joint Venture
     reasonably determines that the remaining Off-Spec Inventory cannot
     be reworked or converted into a salable product, the Retaining
     Party shall be responsible for disposal of such material and shall
     bear all costs, expenses and liabilities (including, without
     limitation, environmental liabilities) related thereto.  The
     Retaining Party agrees to properly dispose of all such Off-Spec
     Inventory in accordance with all applicable laws and regulations
     and in accordance with prudent environmental and safety standards.

     [*** ********* ***** ***** **** ** ***** ** **** *** ********
     ********** ****** ***** ** *** ***** **** *** ********* ***** **
     **** ****** *********** **** *** ***** ******** *** ** **** *****
     *** ******** *********** **** ******** **** ** *****]

     4.13.  POCATELLO CONSENT DECREE ASSETS.
     A new Section 27.9 is hereby added to the JVA:

     "27.9.  POCATELLO CONSENT DECREE ASSETS.  The Parties hereto
     acknowledge that certain of the assets necessary for FMC to be in
     compliance with the Consent Decree (the "PCDA") will not be
     contributed to the Joint Venture, but instead will be contributed
     to FMC Properties, LLC ("FMC Properties"), a special purpose
     wholly-owned subsidiary of FMC.  The PCDA will be leased by FMC
     Properties to the Joint Venture (the "Master Lease").  In
     connection with this structure, FMC and Solutia have agreed that
     the Joint Venture will purchase an insurance policy or bond for
     each year during the term of such lease (each such bond or
     insurance policy being, the "Insurance Policy"), owned by the
     Joint Venture, with the Joint Venture as the beneficiary.  The
     Joint Venture shall annually renew and prepay the premium for the
     following 12-month period for the Insurance Policy no less than 75
     days prior to the expiration of the existing Insurance Policy.
     The Insurance Policy shall provide that if FMC does not fund the
     full amount of the payments under the Lease within 10 days of
     demand by the Joint Venture or if the Insurance Policy is not
     renewed as provided above (in either case upon the election of
     Solutia as a member of Astaris Idaho (as defined in Section 27.11)
     to make demand on the Insurance Policy) or if at the election of
     Solutia as a member of Astaris Idaho determines for reasonable
     business reasons to make demand on the Insurance Policy or
     exercise any other rights or remedies available to the Joint
     Venture, then the Insurance Policy shall fund such amount, without
     set-off or deduction and without regard to the solvency or
     insolvency of FMC.  FMC and Solutia agree that the Insurance
     Policy shall be issued on or before the Effective Date.  FMC shall
     cause the Insurance Policy to be issued on or before the Effective
     Date in a form reasonably acceptable to Solutia and FMC."

     4.14.  INVENTORY.
     A new Section 27.10 is hereby added to the JVA:

     "27.10.  INVENTORY.  The Parties hereto acknowledge that it is
     their intention that their respective Group contribute to the
     Joint Venture inventory that meets specification or is reworkable,
     and if such inventory is not in such condition and cannot be
     reworked (and the Parties agree that the Joint Venture will use
     its commercially reasonably efforts to rework such material), that
     it shall be the responsibility of such Group to reimburse the
     Joint Venture for the appropriate standard cost of replenishing
     said inventory.  If in the 90 day period following the Effective
     Date, the Joint Venture determines in its commercially reasonable
     judgment that it has


                              10




     received from a Group non-reworkable, out of specification, or
     non-existent physical inventory, vis-a-vis such Group's Closing
     Balance Sheet, then it will contact FMC (if it is inventory from
     the FMC Group) or Solutia (if it is inventory from the Solutia
     Group), and if FMC or Solutia, as the case may be, and the Joint
     Venture cannot resolve such matters, then such disputes shall be
     handled by the dispute resolution procedures set forth in Article
     25 hereof.  No amount may be claimed by the Joint Venture against
     a Group unless such amount is in excess of $100,000 in the
     aggregate with respect to a Group.  Notwithstanding the foregoing,
     this Section 27.10 does not apply to off-specification P2S5
     inventory which is discussed above in Section 27.8."

     4.15.  STRUCTURE.
     A new Section 27.11 is hereby added to the JVA:

     "27.11.  STRUCTURE.

     27.11(A)  The Parties hereto acknowledge that it is their
     intention that the initial structure of the Joint Venture in the
     United States shall be as shown on Appendix 27.11 attached hereto.
     This is an initial domestic structure and may be changed or
     modified at any time by the mutual written agreement of the
     Parties.

     27.11(B)  All of the Solutia Group's Transferred Assets shall be
     contributed to a parent company initially known as Astaris LLC.
     Astaris LLC shall be owned 50% by Solutia and 50% by FMC.

     27.11(C)  Subject to Section 27.11(F), the FMC Group's
     Transferred Assets that are exclusively dedicated or exclusively
     used at the Pocatello Site, as well as its interest in the Master
     Lease (as defined below), shall be contributed by the FMC Group to
     an entity initially known Astaris Idaho LLC ("Astaris Idaho").
     Astaris Idaho will initially be owned 99% by FMC and 1% by
     Solutia.  The transfers described in this Section will occur prior
     to the contribution by FMC to Astaris LLC as described in Section
     27.11(E).

     27.11(D)  The FMC Group's Transferred Assets that are
     exclusively dedicated or exclusively used at the Kemmerer Site, or
     are mining properties, such as the Silica mine, the shale reserves
     or the phosphates reserves, shall be contributed by the FMC Group
     to an entity initially known Astaris Production LLC ("Astaris
     Production").  Astaris Production will initially be owned 99% by
     FMC and 1% by Solutia.  In addition, a joint and undivided
     interest in all of the PPA Technology will be transferred by the
     FMC Group to Astaris Production.  The transfers described in this
     Section will occur prior to the contribution by FMC to Astaris LLC
     as described in Section 27.11(E)

     27.11(E)  Subject to Section 27.11(F), the FMC Group will
     contribute its remaining Transferred Assets, which will also
     include, without limitation, a 98% interest in both Astaris Idaho
     and Astaris Production, to Astaris LLC.

     27.11(F)  All PCDA (as defined in Section 27.9) shall be
     contributed to FMC Properties (as defined in Section 27.9).  FMC
     Properties shall be owned 100% by FMC.  On the Effective Date, FMC
     Properties shall enter into a Master Lease Agreement with FMC
     Properties for the lease of all then or thereafter existing PCDA
     (the "Master Lease").  FMC will be obligated to fund all rentals
     and the purchase option in the Master Lease.  FMC's obligations
     shall be secured by the Insurance Policy, as well as a pledge of
     all of the membership interests in FMC Properties


                              11




     in favor of Astaris Idaho and a security interest in favor of
     Astaris Idaho in all of FMC Properties' assets.

     27.11(G)  Astaris Idaho and Astaris Properties will be member
     managed limited liability companies.  Astaris LLC and its
     subsidiaries shall enter into such agreements as may be necessary
     from time to time with regards to tax, operations and other
     matters."

     4.16.  FMC PROPERTIES INDEMNITY.
     A new Section 27.12 is hereby added to the JVA:

     "27.12.  FMC PROPERTIES INDEMNITY.  FMC agrees to indemnify and
     hold harmless the Joint Venture and the Solutia Group from any tax
     liability arising in connection with the transactions contemplated
     by the Operating Agreement for FMC Properties, the Master Lease
     and the assignment of the Master Lease; provided, however, with
     respect to transfer taxes, FMC shall only indemnify the Joint
     Venture with respect to any transfer taxes in excess of the amount
     of transfer taxes that the Joint Venture would have been liable
     for under Section 20.2 of this Agreement had the PCDA been
     transferred by FMC to the Joint Venture as a Transferred Asset on
     the Effective Date.

     4.17.  BONDS.
     A new Section 27.13 is hereby added to the JVA:

     "27.13.  BONDS.

     27.13(A)  FMC has entered into a Loan Agreement (as amended,
     modified, supplemented or restated the, "Loan Agreement") with the
     Industrial Development Authority of Power County, Idaho, dated as
     of August 1, 1999 (the "Issuer").  In connection therewith, the
     Issuer entered into an Indenture of Trust (as amended, modified,
     supplemented or restated from time to time, the "Indenture") with
     the Bank of New York, as trustee, dated as of August 1, 1999 (the
     "Trustee").  The Issuer issued $50,000,000 in bonds (the "Bonds")
     the proceeds of which were loaned to FMC pursuant to the Loan
     Agreement to be used by FMC to purchase certain PCDA (as defined
     in Section 27.9).  In connection with the foregoing, FMC, the
     Issuer and the Trustee executed a Tax Exemption Certificate and
     Agreement, dated as of August 20, 1999 (as amended, modified,
     supplemented or restated, the "Tax Agreement") and FMC executed a
     Project Certificate, dated as of August 20, 1999 (the "Project
     Certificate").  The Indenture, the Loan Agreement, the Tax
     Agreement and the Project Certificate, together with the
     documents, agreements and certificates executed in connection
     therewith or delivered in connection therewith are collectively
     referred to as the "Bond Documents."

     Furthermore, FMC intends to finance certain additional PCDA by the
     use of additional bonds which will be issued after the Effective
     Date (the "Future Bonds").  Simultaneously with the issuance of
     the Future Bonds, (i) the defined term "Bonds" above shall be
     deemed to include the Future Bonds, and (ii) all documents,
     instruments and agreements executed in connection with the Future
     Bonds or delivered in connection with the Future Bonds (including,
     without limitation, all indentures, loan agreements and tax
     agreements) shall be deemed to be included in the definition of
     "Bond Documents."

     Finally, FMC has existing bonds relating to certain assets at the
     Pocatello, Idaho facility (the "Old Bonds").  All documents,
     instruments and agreements executed in connection with the Old
     Bonds or delivered in connection with the Old Bonds (including,
     without limitation, all



                              12



     indentures, loan agreements and tax agreements) shall be deemed to
     be included in the definition of "Bond Documents."

     27.13(B)  Neither the Joint Venture, the Solutia Group, nor their
     respective employees, agents, officers and directors
     (collectively, the "Released Group", and individually, each being
     a  "member of the Released Group"), shall be liable to FMC or any
     other member of the FMC Group (or any of their respective
     employees, agents, officers and directors) for, and FMC releases
     and discharges and shall cause each member of the FMC Group to
     release and discharge (and each officer, director, employee, and
     agent thereof to so release and discharge), each member of the
     Released Group from, any and all claims, damages, liabilities,
     actions, suits, proceedings, judgments, orders, fines, penalties,
     injuries, direct or liquidated damages, costs (including costs of
     defense and investigation) and expenses, including special,
     incidental consequential, exemplary, indirect or punitive damages
     (collectively, "Losses"), to, or suffered by, or incurred by, FMC
     or any other member of the FMC Group, or any officer, director,
     employee or agent of FMC or any member of the FMC Group arising
     out of or connected with in any manner the Old Bonds, the Bonds or
     the Bond Documents, including, without limitation, any sale,
     transfer or disposition of any asset purchased with proceeds of
     the Old Bonds or the Bonds by any person or entity, any action at
     the Pocatello facility (including the shutdown of such facility)
     or any change in control of the Joint Venture.  It is the express
     intention of the Parties hereto that the release provided for in
     this subsection is to include, but not be limited to, a release by
     FMC and the FMC Group, and their respective officers, directors,
     employees and agents of each member of the Released Group from the
     consequences of any member of the Released Group's own negligence,
     to the extent that such negligence is either the sole, concurring
     or joint cause of the Losses.  The foregoing Release does not
     include, with respect to the Joint Venture, any intentional or
     willful breach by the Joint Venture of Section 27.13(E) below.

     27.13(C)  FMC hereby agrees to indemnify and hold harmless any
     member of the Released Group, from any and all Losses incurred or
     paid by any member of the Released Group, including, without
     limitation, to any FMC or any other member of the FMC Group
     (including an employee, contractor or agent of FMC or the FMC
     Group, or any of their officers, directors, employees or agents),
     or any third party (including an employee, contractor or agent of
     any member of the Released Group, or any of their officers,
     directors, employees or agents) arising out of or connected with
     any act or omission, negligent or otherwise, of any member of the
     Released Group with respect to the Old Bonds, the Bonds or the
     Bond Documents.  It is the express intention of the Parties
     hereto that the indemnity provided for in this subsection is to
     include, but not be limited to, the Released Group from the
     consequences of each member of the Released Group's own
     negligence, to the extent that such negligence is either the sole,
     concurring or joint cause of the Losses. The foregoing indemnity
     does not include, with respect to the Joint Venture, any
     intentional or willful breach by the Joint Venture of Section
     27.13(E) below.  FMC and the FMC Group's obligations in this
     Section and its representation and warranty below are without
     regard to any deductible or de minimis as set forth in Sections
     14.1(a) and 14.1(b) hereof

     27.13(D)  FMC agrees to promptly provide written notice to the
     Joint Venture and to Solutia upon FMC receiving written notice of,
     or having knowledge of, any default under the Bond Documents.  The
     failure of FMC to give any such notice shall not give rise to any
     liability by FMC to the Joint Venture or Solutia unless such
     failure is intentional or willful.  FMC represents and warrants
     that with respect to any assets purchased with proceeds of the Old
     Bonds Astaris is not and will not be subject to any restrictions
     on transfer or use, or any other type of restriction, and such
     assets are not subject to any lien, encumbrance or security
     interest of any kind or nature.


                              13



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     27.13(E)  The Joint Venture agrees to provide written notice to
     FMC and to Solutia no less than 60 days prior to the Joint
     Venture's change of the use from a solid waste disposal facility
     of any material assets being leased under the Master Lease (as
     defined in Section 27.9) which was purchased with the proceeds of
     the Bonds or selling, transferring, conveying or leasing any of
     the assets identified in the Master Lease (as defined in Section
     27.9) as being purchased with the proceeds of the Bonds; provided,
     however, the foregoing obligation of the Joint Venture shall not
     apply to any the ordinary course replacement of any such
     nonmaterial assets; and provided further, however, with respect to
     an involuntary sale, transfer, lease or conveyance of such assets,
     whether by the Joint Venture or any third party, including,
     without limitation, any action taken by any creditor of the Joint
     Venture, the Joint Venture shall not be obligated to give prior
     notice of such involuntary sale, transfer, lease or conveyance of
     such assets, but upon the Joint Venture receiving notice of such
     involuntary sale, transfer, lease or conveyance, the Joint Venture
     shall use its reasonable efforts to provide notice of such
     involuntary sale, transfer, lease or conveyance of such assets to
     FMC.  The failure of the Joint Venture to give any such notice
     shall not give rise to any liability by FMC to the Joint Venture
     or Solutia unless such failure is intentional or willful.

     27.13(F)  The Joint Venture shall as promptly as reasonably
     practical respond to FMC's reasonable inquiries made to the Joint
     Venture by FMC from time to time regarding the use of the assets
     purchased with the proceeds of the Bonds subject to the Master
     Lease.

     27.13(G)  All references to the "Joint Venture" in this Section
     27.13 shall refer to the Joint Venture and its successors and
     assigns."

     4.18.  [****** ****]
     A new Section 27.14 is hereby added to the JVA:

     "27.14.  [****** ****] SALES CONTRACT.  [**** ******* ** ****
     ******* ********** ****** ******** ** *** ******* *** *** ******
     ***** ***** **** ** ***** ** ******* ** * ****** ********** *****
     ******** *** **** **** ******* ************ *** ******* ***** ****
     *** **** ********** *** ***** ******* *** ******* ******* ** ***
     ********* ** *** ****** ********* ** *** **** **** ** *** *****
     ******* ** ***** ** ********** **** *** ********** ******* ***
     **** ******* *** ***** ******** ***** ****** ******** ************
     ******** ** *** *********** ** *** ********** **********]

     4.19.  CARONDOLET PROJECT.
     A new Section 27.15 is hereby added to the JVA:

     "27.15.  CARONDOLET ASSETS. Notwithstanding anything to the
     contrary in any of the Limited Liability Company Agreements of the
     Joint Venture, in the event that the Internal Revenue Service
     succeeds in requiring the Joint Venture to capitalize (and
     depreciate) installation of a cooling tower for the STP cooling
     water at Carondolet to be funded by Solutia (the "Carondolet
     Project"), then the parties agree that: (i) Solutia's funding of
     the Carondolet Project shall (for purposes of the Limited
     Liability Agreements and for income tax purposes) be treated as a
     capital contribution to the Joint Venture; and, (ii) tax
     depreciation allowed to the Joint Venture on the Carondolet
     Project shall be specially allocated to Solutia."

5.  REPRESENTATIONS AND WARRANTIES.  Each Party hereby represents and
warrants to the other Party as of the date hereof that (i) this
Amendment has been duly authorized by such Party's Board of Directors,



                              14




(ii) no consents are necessary from any third Person for such Party's
execution, delivery or performance of this Amendment which have not been
obtained, and (iii) this Amendment constitutes the legal, valid and
binding obligation of such Party enforceable against such Party in
accordance with its terms, except as the enforcement thereof may be
limited by bankruptcy, insolvency or other laws related to creditors
rights generally or by the application of equity principles.

6.  EFFECT OF AMENDMENT; REAFFIRMATION.  The execution, delivery and
effectiveness of this Amendment shall not operate as a waiver of any
right, power or remedy of either Party under the JVA, nor constitute a
waiver of any provision of the JVA.  Each reference in the JVA and in
this Amendment to "the JVA", "the Agreement", "hereunder", "hereof",
"herein", or words of like import, shall be read as referring to the JVA
as amended by this Amendment.  Each Party hereby acknowledges and
confirms that except as expressly amended hereby, the JVA remains in
full force and effect.

7.  GOVERNING LAW.  This Amendment shall be governed by and construed
under the laws of the State of New York without giving effect to choice
or conflicts of law principles thereunder.

8.  SECTION TITLES.  The section titles in this Amendment are for
convenience of reference only and shall not be construed so as to modify
any provisions of this Amendment.

9.  COUNTERPARTS; FACSIMILE TRANSMISSIONS.  This Amendment may be
executed in one or more counterparts and on separate counterparts, each
of which shall be deemed an original, but all of which together shall
constitute one and the same instrument.  Signatures to this Amendment
may be given by facsimile or other electronic transmission, and such
signatures shall be fully binding on the party sending the same.



{REMAINDER OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS}




                              15



(The information below marked by * and [] has been omitted pursuant to a
request for confidential treatment.  The omitted portion has been
separately filed with the Commission.)

     IN WITNESS WHEREOF, this Amendment has been duly executed as of
the date first above written.

                           SOLUTIA INC.

                           By:           /s/ Dennis Cavner
                                       ---------------------------------
                           Print Name:       Dennis Cavner
                                       ---------------------------------
                           Title:            Vice President
                                       ---------------------------------





                           FMC CORPORATION

                           By:           /s/ Robert I. Harries
                                       ---------------------------------
                           Print Name:       Robert I. Harries
                                       ---------------------------------
                           Title:            Vice President
                                       ---------------------------------





ATTACHMENTS TO THE THIRD AMENDMENT TO THE JOINT VENTURE AGREEMENT [OMITTED]

Attachment C to Appendix 1.15 to the JVA

New Appendix 7.1 to the JVA to replace the existing Appendix 7.1

New Appendix 15.2 to the JVA (Pocatello Consent Decree Asset Principles)

New Appendix 24 to the JVA (Brazilian Restructuring)

New Appendix 27.11 to the JVA (Joint Venture Structure)

Appendix 27.14 to the JVA ([******] example)



                              16





                        OMITTED ATTACHMENTS

A list briefly identifying the contents of all omitted attachments to this
Third Amendment to Joint Venture Agreement appears on page 16 of the Third
Amendment. Solutia will furnish supplementally to the Securities and
Exchange Commission upon request a copy of any omitted attachment.