Olin 8K Regulation FD Disclosure | OLN 17 Nov 10

2010 Citi North American
Credit Conference

November 18, 2010

Exhibit 99.1

Olin Representatives

John E. Fischer

Senior Vice President & Chief Financial Officer

Larry P. Kromidas

Assistant Treasurer & Director, Investor Relations

lpkromidas@olin.com

(618) 258 - 3206

Company Overview

All financial data are for the nine months ending September 30, 2010 and the year ending 2009, and are presented in millions of U.S.
dollars except for earnings per share. Additional information is available on Olin’s website www.olin.com in the Investors section.

Winchester

Chlor Alkali

Third Largest North American
Producer of Chlorine and Caustic Soda

9Mo 2010 FY 2009

Revenue: $ 764 $ 964

Income: $ 81 $ 125

A Leading North American Producer
of Small Caliber Ammunition

9Mo 2010 FY 2009

Revenue: $ 437 $ 568

Income: $ 59 $ 69

Revenue: $ 1,201 $ 1,532

EBITDA: $ 163 $ 292

Pretax Operating Inc.: $ 79 $ 210

EPS (Diluted): $ .79 $ 1.73

9MO 2010 FY 2009

Olin

Olin Vision

To be a leading Basic Materials company delivering
attractive, sustainable shareholder returns

• Being the low cost, high quality producer, and the
#1 or #2 supplier in the markets we serve

• Providing excellent customer service and
advanced technological solutions

• Generating returns above the cost of capital over
the economic cycle

Olin Corporate Strategy

1. Build on current leadership positions in the

Chlor-Alkali and Ammunition businesses

• Improve operating efficiency and profitability

• Integrate downstream selectively

2. Allocate resources to the businesses that can create the
most value

3. Manage financial resources to satisfy legacy liabilities

Total Return to Shareholders in Top Third of S&P 1000

Return on Capital Employed Over Cost of Capital Through the Cycle

Olin Corporation Goal: Superior Shareholder Returns

Investment Rationale

• Leading North American producer of Chlor-Alkali

• Strategically positioned facilities

• Diverse end customer base

• Favorable industry dynamics

• Leading producer of industrial bleach with additional
growth opportunities

• Pioneer synergies improved chlor-alkali cost structure

• Winchester’s leading industry position

Chlor Alkali Segment

ECU = Electrochemical Unit; a unit of measure reflecting the chlor alkali process outputs
of 1 ton of chlorine, 1.13 tons of 100% caustic soda and 0.3 tons of hydrogen.

N. American
Position

% 2009
Revenue

#1
Industrial

#1
Merchant

#1
Burner
Grade

10%

53%

24%

Chlor Alkali Manufacturing Process

SALT + ELECTROLYSIS = OUTPUTS

Caustic Soda

(Sodium Hydroxide)

(Potassium Hydroxide)

Bleach

(Sodium Hypochlorite)

Chlorine

Sodium Chloride

Potassium Chloride

KOH

HCl

(Hydrochloric Acid)

Hydrogen Gas

Caustic Soda

KOH

Chlorine

Hydrogen

• Be the preferred supplier to chlor alkali customers in
addition to being the low cost producer

• Goal is to increase the value of the Chlor Alkali
Division to Olin through:

– Optimizing capacity utilization

– Higher margin downstream products

– Cost reduction and financial discipline

Olin’s Chlor Alkali Strategy

Source: CMAI/Olin - 2009 year-end figures

Oxy includes OxyVinyls and does not reflect the announced reduction of approximately 280,000 tons of capacity at their Taft, LA facility.

Olin includes 50% of Sunbelt joint venture.

Olin is #3 Chlor-alkali Producer

Bleach Plants

Tacoma, WA

Tracy, CA

Santa Fe Springs, CA

Henderson, NV

St. Gabriel, LA

Augusta, GA

Charleston, TN

Niagara Falls, NY

Becancour,

Quebec

Olin’s Geographic Advantage

Source: Olin.

(1) The Becancour Plant has 275,000 short tons diaphragm and 65,000 short tons membrane capacity.

Location	Chlorine Capacity (000s Short Tons)
McIntosh, AL	415
Becancour, Quebec (1)	340
Niagara Falls, NY	286
Charleston, TN	248
St. Gabriel, LA	246
McIntosh, AL (50% of Sunbelt JV)	160
Henderson, NV	152
Augusta, GA	108
Total	1,955

• Access to regional customers including bleach and water treatment

• Access to alternative energy sources

– Coal, hydroelectric, nuclear, natural gas

Diverse Customer Base

Chlorine: “Organics” includes: Propylene oxide, epichlorohydrin, MDI, TDI, polycarbonates. “Inorganics” includes: Titanium dioxide and bromine.

Caustic Soda: “Organics” includes: MDI, TDI, polycarbonates, synthetic glycerin, sodium formate, monosodium glutamate. “Inorganics” includes: titanium dioxide, sodium silicates, sodium cyanide.

Chlorine

North American Industry

Olin

Capacity Rationalization

Favorable Industry Dynamics

Target

Acquisition
Date

Position

2007

2004

• Acquired by Olin

• 725,000 Short Tons ECU Capacity

• Then the #7 ranked producer in
North America

• 4.7% of North American capacity

• Acquired by OxyChem

• 859,000 Short Tons ECU Capacity

• Then the #7 ranked producer in
North America

• 5.5% of North American capacity

• 250,000 Short Ton ECU capacity
plant expansion 2H 2013

• Plant located at Geismar, LA

Source: CMAI.

Pioneer

Vulcan

Westlake Chemical

Industry Consolidation

Delayed Capacity Expansion

2.0 mm MT
or 13% of
2000 net
capacity
reduction

mmMT

13.6

15.6

2009

2000

Product Pricing Has Been Dynamic

(1) ECU Price = the price of 1 ton of chlorine + 1.1 times the price of 1 ton of caustic Source: CMAI.

North American Caustic Soda
Avg. Acquisition, US$/Short Ton

North American Chlorine
Contract, US$/Short Ton

(1)

Chlor-Alkali Outlook

• 2010 segment earnings will be solidly profitable in trough
period without sustaining a loss in any one quarter

• Q4 2010 and Q1 2011 ECU Netbacks are expected to
improve reflecting $135 of 3Q 2010 caustic soda price
announcements

• Price announcements impacting 2010:

Chlorine Caustic Soda

December 2009 $75

February 2010 $80

May 2010 $50 $35 / $50

August 2010 $40 and $45

September 2010 $50

• Q3 2010 operating rates improved to 91%, the highest level
since Q3 2007 reflecting record bleach sales

Why Industrial Bleach?

• Olin is the leading North American bleach producer with a capacity of
250 million gallons (or 160,000 ECUs) in a 1 billion gallon industry

• Olin has 18% market share and current installed capacity to service
25% of the market with low-cost expansion opportunities

• Utilizes both chlorine and caustic soda in an ECU ratio

• Current bleach premium over ECU prices is above $200 per ton

• Demand is not materially impacted by economic cycles

• Regional nature of bleach business benefits Olin’s geographic diversity,
further enhanced by Olin’s proprietary railcar technology to reach more
distant customers

• Bleach volumes have increased more than 10% for 8 consecutive
quarters with a 3 year compounded growth rate of 45%

Mercury Legislation

• On October 21, 2009, the U.S. House of Representatives
Committee on Energy and Commerce passed a bill that
would require chlor-alkali producers using mercury cell
technology to decide by 6/30/12 whether they would shut
down or convert those plants. The plants would need to be
shut down by 6/30/13 or converted by 6/30/15.

• During the third quarter of 2009, a companion bill was
introduced in the U.S. Senate

• To date, no votes have been taken on the House floor and the
Senate has not acted; outcome of legislation is uncertain

• Olin currently operates 2 mercury cell plants representing
356,000 ECUs or 18% of our total capacity *

* Olin’s total capacity includes 50% ownership of the SunBelt JV

Winchester Segment

Winchester Strategy

• Leverage existing strengths

– Seek new opportunities
to leverage the
legendary Winchester®
brand name

– Investments that
maintain Winchester as
the retail brand of
choice, and lower costs

• Focus on product line
growth

– Continue to develop
new product offerings

• Provide returns in excess of
cost of capital

	Hunters & Recreational Shooters
Products	Retail	Distributors	Mass Merchants	Law Enforcement	Military	Industrial
Rifle	ü	ü	ü	ü	ü
Handgun	ü	ü	ü	ü	ü
Rimfire	ü	ü	ü	ü	ü	ü
Shotshell	ü	ü	ü	ü	ü	ü
Components	ü	ü	ü	ü	ü	ü

Brands

Winchester’s Leading
Industry Position

• One of the three leading ammunition manufacturers
in the United States *

• Strong brand awareness

– Top 15 of all sporting goods brands

• Legendary brand image

– Positively associated with American heritage,
John Wayne, Teddy Roosevelt and
cowboy/western connotations

• Category leadership and expertise demonstrated by
selection to manage ammunition category for key,
national retailers

• Leading consumer goods marketer with an increased
presence on television and the Internet

• Innovator of market-driven new products

* Source: National Shooting Sports Foundation.

Favorable Industry Dynamics

Commercial

• Economic environment leading to personal security concerns

• Fears of increased gun/ammunition control due to change in administration

• New gun and ammunition products

• Strong hunting activity in weak economy, driven by cost/benefit of hunting
for food and increased discretionary time

Law
Enforcement

• Significant new federal agency contracts and solid federal law enforcement
funding

• Higher numbers of law enforcement officers and increase in federal agency
hiring

• Increased firearms training requirements among state and local law
enforcement agencies

Military

• Sustained high demand for small caliber ammunition due to wars in Iraq and
Afghanistan

• Commitment to maintaining the “Second-Source Program” to mitigate the
risk of a sole-source small caliber ammunition contract

Winchester

• YTD 2010 segment earnings of $59 million follow record full year
2009 earnings of $69 million

• Olin believes surge has ended, but with higher military and law
enforcement component, we expect financial results will exceed
pre-surge levels

• Long-term military and law enforcement agency contract sales
accounted for more than 30% of segment revenue in 2010

• Winchester has been awarded approximately $110 million of new
military and law enforcement business thus far this year

• New gun ownership is expected to translate into higher long-term
ammunition consumption

• Commercial backlog has declined, but military and law
enforcement backlog has increased

Financial Highlights

• Strong Balance Sheet

– Q3 2010 cash balance approximately $393 million and is
expected to be in the $450-$475 million range by year end

– Pension plan remains fully funded with no contributions
required until at least 2012

– 2010 capital spending forecast to be 85% of depreciation

• Profit Outlook

– ECU pricing trends are positive

– Higher margin bleach business is growing

– Converted and expanded St. Gabriel facility is on-line and
reducing both operating and freight costs

– Winchester’s performance continues to be strong

Historical Financial Performance

Revenues
($ millions)

EBITDA
($ millions)

$1,040

$1,277

$1,765

$1,532

$201

$207

$335

$292

Note: EBITDA is Income from Continuing Operations Before Taxes, excluding Interest Expense, Interest Income, and Depreciation and Amortization expense.

-$107

-$103

-$96

$29

Potential Uses of Cash

• Olin maintains a conservative view of liquidity and capital
structure

• Major debt maturities should be staggered (3-4 years apart) with
manageable towers ($150 million maximum)

• The normal year end cash balance should be approximately $200
million

• Olin currently has the resources to fund the exit of mercury cell
technology

• In 2009 Olin issued $150 million in 10 year debt

• In 2010 Olin will issue $70 million to $110 million of 12 year
tax exempt bonds

• In 2010 Olin has redeemed $20 million of industrial revenue
bonds that would have been due in 2016

• In 2011 Olin will repay $75 million of debt

Investment Rationale

• Leading North American producer of Chlor-Alkali

• Strategically positioned facilities

• Diverse end customer base

• Favorable industry dynamics

• Leading producer of industrial bleach with additional
growth opportunities

• Pioneer synergies improved chlor-alkali price structure

• Winchester’s leading industry position

Forward-Looking Statements

This presentation contains estimates of future
performance, which are forward-looking
statements and actual results could differ
materially from those anticipated in the forward-
looking statements. Some of the factors that could
cause actual results to differ are described in the
business and outlook sections of Olin’s Form 10-K
for the year ended December 31, 2009 and Form
10-Q for the quarter ended September 30, 2010.
These reports are filed with the U.S. Securities and
Exchange Commission.

Appendix

1892 founded in East Alton, IL providing
blasting powder to Midwestern coal mines

1898 formed Western Cartridge Company
to manufacture small arms ammunition

1931 acquires Winchester Repeating Arms

1940s & 1950s acquires cellophane, paper,
lumber & powder-actuated tools businesses

1892 founded in Saltville, VA to produce
soda ash.

1896 builds first chlor-alkali plant in US

1909 introduces first commercial
production of liquefied chlorine

1940s & 1950s builds plants in Lake
Charles, LA & McIntosh, AL, buys Squibb

1954 Merger creates the Olin Mathieson Chemical Corporation

1950s & 1960 entered into phosphates, aluminum, urethanes, TDI, skis, camping
equipment, homebuilding and expanded paper and forestry businesses

1970s to 2000 consolidation back to core businesses, spin-offs included forest
products (Olinkraft), military ordnance (Primex) and specialty chemicals (Arch)
and sold aluminum, TDI, urethanes and Squibb businesses

2007 acquired Pioneer and sold the Metals business, resulting in a company
similar in businesses to that which existed in the late 1890s

Olin Industries Mathieson Chemical Corp.

Capacity Rationalization: 2000-2013

Source: Olin Data

Technology Key: HG=Mercury, DIA=Diaphragm, MB=Membrane, STB=Salt-to-Bleach.

Olin (OLN) 8-KRegulation FD Disclosure