Washington, D.C. 20549

(Commission File Number) 0-30270

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PART I. FINANCIAL INFORMATION

ITEM 1. Financial Statements and Accompanying Notes

CROMPTON CORPORATION AND SUBSIDIARIES
Condensed Consolidated Statements of Earnings (Unaudited)
First quarter ended March 31, 2005 and 2004
(In thousands of dollars, except per share data)

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CROMPTON CORPORATION AND SUBSIDIARIES
Condensed Consolidated Balance Sheets
March 31, 2005 (Unaudited) and December 31, 2004
(In thousands of dollars)

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CROMPTON CORPORATION AND SUBSIDIARIES
Condensed Consolidated Statements of Cash Flows (Unaudited)
First quarter ended March 31, 2005 and 2004
(In thousands of dollars)

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CROMPTON CORPORATION AND SUBSIDIARIES
Notes to Condensed Consolidated Financial Statements (Unaudited)

The information in the foregoing condensed consolidated financial statements for the first quarter ended March 31, 2005 and March 31, 2004 is unaudited, but reflects all adjustments that are of a normal recurring nature, which in the opinion of management, are necessary for a fair presentation of the results of operations for the interim periods presented. The foregoing condensed consolidated financial statements include the accounts of Crompton Corporation and its wholly-owned and majority owned subsidiaries, which are collectively referred to as "the Company." Other affiliates in which the Company has a 20% to 50% ownership are accounted for in accordance with the equity method.

As a result of the agreement to sell the Refined Products business to Sun Capital Partners Group, Inc. announced on March 18, 2005, the accompanying condensed consolidated financial statements reflect the Refined Products business as a discontinued operation. The operations of the Refined Products business have been classified as earnings from discontinued operations (net of tax) and the estimated carrying amount of the assets being sold and of the liabilities being transferred have been reflected as assets and liabilities held for sale for all periods presented. The condensed consolidated statements of cash flows have not been adjusted to reflect the discontinued operation and thus include the cash flows of the Refined Products business for all periods presented. Refer to the discontinued operations footnote for further information.

Certain financial information and footnote disclosures included in the annual financial statements have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission for reporting on Form 10-Q. The interim consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company's 2004 Annual Report on Form 10-K. The consolidated results of operations for the three months ended March 31, 2005 are not necessarily indicative of the results expected for the full year.

Cost of products sold includes all costs incurred in manufacturing products, including raw materials, direct manufacturing costs and manufacturing overhead. Cost of products sold also includes warehousing, distribution, engineering (other than polymer processing equipment design engineering), purchasing, customer service and environmental, health and safety functions, and shipping costs for outbound product shipments. Selling, general and administrative expenses (SG&A) include costs and expenses related to the following functions and activities: selling, advertising, polymer processing equipment design engineering, information technology, legal, provision for doubtful accounts, corporate facilities and corporate administration. SG&A also includes accounting, finance and human resources, excluding direct support in manufacturing operations, which is included as cost of products sold. Research and development expenses (R&D) include basic and applied research and development activities of a technical and non-routine nature. R&D costs are expensed as incurred. Costs of products sold, SG&A and R&D expenses exclude depreciation and amortization expenses, which are presented on a separate line in the condensed consolidated statements of earnings.

Included in cost of products sold are shipping costs of $15.7 million and $16.7 million for the first quarters ended March 31, 2005 and March 31, 2004, respectively.

Included in the Company's condensed consolidated balance sheets at March 31, 2005 and December 31, 2004, is approximately $15 million and $20 million, respectively, of restricted cash that is required to be on deposit to support certain letters of credit and performance guarantees, the majority of which will be settled within one year. In addition, at March 31, 2005, the Company had approximately $58.2 million in a cash collateral account that is restricted to pay current and future litigation liabilities, including related legal costs.

Included in accounts receivable are allowances for doubtful accounts of $22.6 million at March 31, 2005 and $22.3 million at December 31, 2004.

Accumulated depreciation amounted to $854.3 million at March 31, 2005 and $835.6 million at December 31, 2004.

Certain reclassifications have been made to the prior year condensed consolidated statement of earnings, including the reclassification of shipping costs from SG&A to cost of products sold to provide comparability to other entities in the Company's business sector.

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As permitted under Financial Accounting Standards Board (FASB) Statements No. 123, "Accounting for Stock-Based Compensation" and No. 148, "Accounting for Stock-Based Compensation - Transition and Disclosure," the Company elected to continue its historical method of accounting for stock-based compensation in accordance with Accounting Principles Board Opinion (APB) No. 25, "Accounting for Stock Issued to Employees." Under APB 25, compensation expense for fixed plans is recognized based on the difference between the exercise price and the stock price on the date of grant. Since the Company's fixed plan awards have been granted with an exercise price equal to the stock price on the date of grant, no compensation expense has been recognized in the statement of operations for these awards. However, compensation expense has been recognized for the restricted stock awards under the Company's long-term incentive programs in accordance with the provisions of APB 25, which would be unchanged under FASB Statements No. 123 and No. 148. In December 2004, the FASB issued Statement No. 123 (revised 2004), "Share-Based Payment", which replaces FASB Statement No. 123 and supercedes APB Opinion No. 25. FASB Statement No. 123 (revised 2004) requires all share-based payments to employees, including grants of employee stock options, to be recognized in the financial statements based on their fair value, beginning with the first interim period after June 15, 2005. On April 14, 2005, the Securities and Exchange Commission announced that the effective date of Statement No. 123 (revised 2004) will be suspended until the beginning of the first fiscal year beginning after June 15, 2005. The Company is in the process of reviewing the accounting impact of these awards under FASB Statement No. 123 (revised 2004).

The following table illustrates the effect on net earnings (loss) and related per share amounts as if the Company had applied the fair value recognition provisions of Statements No. 123 and No. 148 to all stock-based employee compensation awards.

During the first quarter of 2004, the Company appointed a new President and CEO, and the former Chairman, President and CEO; Senior Vice President and CFO; and certain other executives elected to retire. As a result of this reorganization, the Company completed the separation agreements for the former Chairman, President and CEO, Senior Vice President and CFO, and other executives and recorded a pre-tax charge of $2.8 million for severance and related costs in 2004. During the first quarter of 2005, the Company reversed $0.2 million of the 2004 charge to adjust for reserves no longer deemed necessary. Payments and non-cash activity related to this charge were $1.1 million during 2004 and $0.4 million during the first quarter of 2005. The remaining reserve balance at March 31, 2005 was $1.1 million.

In 2004, the Company completed an activity-based restructuring initiative, including a voluntary severance program, intended to structure the Company's operations in a more efficient and cost effective manner. As a result of the voluntary program, 137 U.S. based employees voluntarily elected to terminate their employment. In addition, the Company is in the process of involuntarily terminating approximately 500 worldwide employees as a result of the activity-based restructuring initiative, of which approximately 439 have been terminated as of March 31, 2005. During 2004, the Company recorded pre-tax charges of $54 million for facility closures, severance and related costs. The Company recorded additional charges during the first quarter of 2005 of $2.3 million. The related reserve activity is as follows:

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In addition, during the first quarter of 2004, the Company completed the sale of its manufacturing facility in Freeport, Grand Bahama Island and recorded a $2.1 million pre-tax facility closure charge primarily for asset write-offs.

On March 18, 2005, the Company announced that it entered into a definitive agreement to sell certain assets and assign certain liabilities of its Refined Products business to Sun Capital Partners Group, Inc. (Sun) for $80 million. The consideration that the Company will receive is subject to adjustment based on the change in certain transferred assets and liabilities of the Refined Products business between December 31, 2004 and the closing date, and to adjustments for retained accounts receivables and accounts payables. The Company currently expects that these adjustments will reduce the proceeds by approximately $20 to $25 million. The transaction is subject to regulatory approval and is expected to close during the second quarter of 2005. At closing, the Company will also pre-pay a portion of the manufacturing costs for certain petroleum additives products that will be tolled for the Company by Sun.

The agreement contemplates the sale of assets and assignment of liabilities with estimated carrying amounts as follows:

The revenues, operating profit and pre-tax earnings from discontinued operations for all periods presented are as follows:

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The Company expects to write off certain other assets associated with the Refined Products business with carrying amounts of approximately $9.0 million and $9.2 million at March 31, 2005 and December 31, 2004, respectively. Additionally, due to the liquidation of assets and liabilities associated with the Refined Products business, the unrealized currency translation gains included in accumulated other comprehensive loss ($53.2 million and $67.7 million at March 31, 2005 and December 31, 2004, respectively) will be reversed and recognized as a component of the gain on the sale.

On July 31, 2003, the Company sold certain assets and assigned certain liabilities of its OrganoSilicones business unit to the Specialty Materials division of GE and acquired GE's Specialty Chemicals business. As a result of the transaction, the Company will receive quarterly earn-out proceeds through September 2006 based on the combined performance of GE's existing Silicones business and the OrganoSilicones business that GE acquired from the Company. The total of such earn-out proceeds will be a minimum of $105 million and a maximum of $250 million. The Company received a total of $11.8 million and $8.75 million of earn-out proceeds for the three months ended March 31, 2005 and March 31, 2004, respectively, of which $3.1 million represented additional earn-out proceeds for the three month period ended March 31, 2005 related to the combined performance of GE's existing Silicones business and the OrganoSilicones business that GE acquired from the Company for the fourth quarter of 2004. The additional earn-out proceeds received to date have not been recognized in earnings as the recognition of this additional gain is contingent upon the continued favorable future performance of GE's Silicones business through September 2006. The balance of such proceeds totaled $8.3 million and $5.3 million at March 31, 2005 and December 31, 2004, respectively, and have been included in other liabilities in the condensed consolidated balance sheets.

On March 31, 2005, the Company entered into an agreement with Hamilton Robinson LLC, a private equity firm, to form a joint venture called Davis-Standard LLC, which would combine the Company's Polymer Processing Equipment business and Hamilton Robinson's Black Clawson Converting Machinery Company. The transaction closed on April 29, 2005 and resulted in the Company acquiring a 62.5% non-controlling interest in the Davis-Standard LLC joint venture. In the future, the Company's proportionate share of the joint venture's results of operations will be recognized as equity income or loss in the Company's condensed consolidated statements of earnings.

On March 9, 2005, the Company and Great Lakes Chemical Corporation (Great Lakes) announced the signing of a definitive merger agreement for an all-stock merger transaction, which would create the third largest publicly traded specialty chemicals company in the United States. Under the terms of the agreement, the Great Lakes shareholders will receive 2.2232 shares of the Company's common stock for each share of Great Lakes common stock they hold. The transaction, which is subject to regulatory approval and approval by shareholders of both companies, is expected to close in mid-2005.

On March 22, 2004, the Company entered into an agreement with Bayer CropScience LP in the U. S. and Bayer CropScience Inc. in Canada to sell its 50 percent interest in the Gustafson seed treatment joint venture for $128.9 million. The transaction closed on March 31, 2004 and resulted in a pre-tax gain of $90.9 million in the first quarter of 2004. The Company recorded an additional pre-tax gain of $2 million during the fourth quarter of 2004 as a result of finalizing the licensing consent and related supply agreement relating to the transaction.

The Company has an accounts receivable securitization program to sell up to $125 million of domestic receivables to agent banks. Accounts receivable sold under this program were $97.8 million and $95 million as of March 31, 2005 and December 31, 2004, respectively. In addition, the Company's European subsidiaries have a separate program to sell up to approximately $134 million of their eligible accounts receivable to agent banks as of March 31, 2005. International accounts receivable sold under this program were $93.7 million and $94.9 million as of March 31, 2005 and December 31, 2004, respectively. The total costs associated with these programs of $3 million and $1.9 million for the three months ended March 31, 2005 and March 31, 2004, respectively, are included in other (income) expense, net in the condensed consolidated statements of earnings.

Under the domestic program, certain subsidiaries of the Company sell their accounts receivable to a special purpose entity (SPE) that has been created as a separate legal entity for the purpose of acquiring such receivables and selling an undivided interest therein to agent banks. In accordance with the domestic sale agreement, the agent banks purchase an undivided ownership interest in the accounts receivable owned by the SPE. The amount of such undivided ownership interest will vary based on the level of eligible accounts receivable as defined in the agreement. In addition, the agent banks retain a security interest in all of the receivables owned by the SPE, which was $76.3 million and $66.3 million as of March 31, 2005 and December 31, 2004, respectively. The balance of the unsold receivables owned by the SPE is included in the Company's accounts receivable balance on the consolidated balance sheet. Under the international program, certain foreign subsidiaries

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of the Company sell eligible accounts receivable directly to agent banks. During the period, the Company had an obligation to service the accounts receivable sold under its domestic and international programs. The Company has treated the transfer of receivables under its domestic and international receivable programs as a sale of accounts receivable.

Components of inventories are as follows:

The Company's intangible assets (excluding goodwill) are included in other assets on the balance sheet and comprise the following:

Goodwill by reportable segment is as follows:

During the first quarter of 2005, goodwill decreased $6.7 million due to the reversal of $4.5 million of Polymer Additives goodwill associated with the Witco acquisition and unfavorable foreign currency translation of $2.2 million. The $4.5 million adjustment to Polymer Additives goodwill related to the reversal of certain pre-merger deferred tax liabilities that were no longer deemed necessary.

The Company has elected to perform its annual goodwill impairment procedures for all of its reporting units in accordance with FASB Statement No. 142, "Goodwill and Other Intangible Assets" as of July 31. The Company will update its review as of July 31, 2005, or sooner, if events occur or circumstances change that could reduce the fair value of a reporting unit below its carrying value.

In connection with the Company's review of its strategic alternatives, which resulted in the signing of a definitive agreement to contribute its polymer processing equipment reporting unit to form a joint venture with the Black Clawson Converting

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Machinery Company of Hamilton Robinson LLC, the Company was required to update the goodwill impairment review of its polymer processing equipment reporting unit in accordance with FASB Statement No. 142. Based on its review, the Company concluded that the estimated fair value of the polymer processing equipment reporting unit is greater than the carrying value of its net assets and, therefore, no impairment exists under Statement No. 142 as of March 31, 2005.

The Company has a $220 million five-year domestic credit facility available through August 2009 consisting of a $120 million revolving credit facility and a $100 million pre-funded letter of credit facility. Borrowings under this agreement amounted to $25 million at March 31, 2005. During the first quarter of 2005, the Company reclassified the $9.9 million of outstanding 6.125% Senior Notes that are due in February of 2006 from long-term debt to short-term borrowings on the condensed consolidated balance sheet.

The Company is authorized to issue 500 million shares of $0.01 par value common stock. There were 119,152,254 common shares issued at March 31, 2005 and December 31, 2004, of which 1,675,952 and 3,498,043 shares were held as treasury stock at March 31, 2005 and December 31, 2004, respectively.

The Company issued 1,822,091 and 68,884 treasury shares during the three months ended March 31, 2005 and March 31, 2004, respectively, primarily pursuant to its compensation programs and long-term incentive plans.

The computation of basic earnings per common share is based on the weighted average number of common shares outstanding. The computation of diluted earnings per common share is based on the weighted average number of common and common equivalent shares outstanding. The computation of diluted earnings per common share equals the basic earnings per common share for the first quarter ended March 31, 2004 because the dilutive stock options and other equivalents were not significant.

The following is a reconciliation of the shares used in the computations:

An analysis of the Company's comprehensive income (loss) follows:

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The components of accumulated other comprehensive loss at March 31, 2005 and December 31, 2004 are as follows:

Reclassifications from other comprehensive income to earnings related to the Company's natural gas price swap contracts during the first quarter ended March 31, 2005 were not significant.

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

Components of net periodic benefit cost for the first quarter ended March 31, 2005 and March 31, 2004 are as follows:

The Company expects to make lump sum payments under the provisions of its supplemental executive retirement programs of approximately $7.9 million during 2005, of which $4.1 million was paid in the first quarter of 2005 and the remainder of which is expected to be paid in the second and third quarters of 2005. As a result of the first quarter 2005 payment, a settlement loss of approximately $0.8 million was recorded. During the first quarter of 2004, the Company recorded a curtailment loss of $5.9 million, which is primarily the result of the Company's former Chairman, President and CEO; Senior Vice President and CFO; and certain other executives electing to retire.

The Company expects to contribute $28.4 million to its domestic qualified pension plans in 2005, of which approximately $20 million represents a discretionary contribution. As of March 31, 2005, $0.8 million had been contributed to the Company's domestic qualified pension plans. On April 15, 2005, the Company made an additional contribution of $21.6 million to its domestic qualified pension plans, of which approximately $20 million was discretionary. The Company expects to contribute $11.8 million to its international plans, of which $1.1 million has been contributed as of March 31, 2005. The Company's funding assumptions for its domestic pension plans assume no significant change with regards to demographics, legislation, plan provisions, or actuarial assumption or methods to determine the estimated funding requirements. The Pension Funding Equity Act of 2004 was signed into law on April 10, 2004 and will provide the Company a two-year temporary replacement of the benchmark interest rate for determining funding liabilities and will establish temporary alternative minimum funding requirements for certain underfunded pension plans.

The Company's activities expose its earnings, cash flows and financial position to a variety of market risks, including the effects of changes in foreign currency exchange rates, interest rates and energy prices. The Company maintains a risk-

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management strategy that uses derivative instruments as needed to mitigate risk against foreign currency movements and to manage interest rate and energy price volatility. In accordance with FASB Statement No. 133, "Accounting for Derivative Instruments and Hedging Activities," FASB Statement No. 138, "Accounting for Certain Derivative Instruments and Certain Hedging Activities," and FASB Statement No. 149, "Amendment of Statement No. 133 on Derivative Instruments and Hedging Activities," the Company recognizes in earnings changes in the fair value of all derivatives designated as fair value hedging instruments that are highly effective and recognizes in accumulated other comprehensive loss (AOCL) changes in the fair value of all derivatives designated as cash flow hedging instruments that are highly effective. The Company does not enter into derivative instruments for trading or speculative purposes.

The Company uses price swap contracts as cash flow hedges to convert a portion of its forecasted natural gas purchases from variable price to fixed price purchases. These contracts are designated as hedges of a portion of the Company's forecasted natural gas purchases. The Company's hedge contracts cover a gradually decreasing percentage of its purchase requirements over a rolling two-year period. These contracts involve the exchange of payments over the life of the contracts without an exchange of the notional amount upon which the payments are based. The differential paid or received as natural gas prices change is recognized as an adjustment to cost of products sold.

The following table summarizes the unrealized gains related to certain cash flow hedging for the first quarters ended March 31, 2005 and March 31, 2004.

The Company applies the provisions of FASB Statement No. 143, "Accounting for Asset Retirement Obligations," which requires companies to record a liability for asset retirement obligations in the period in which a legal obligation is created. Such liabilities are recorded at fair value, with an offsetting increase to the carrying value of the related long-lived assets. In future periods, the liability is accreted to its present value and the capitalized cost is depreciated over the useful life of the related asset. Companies are also required to adjust the liability for changes resulting from the passage of time and/or revisions to the timing or the amount of the original estimate. Upon retirement of the long-lived asset, the Company either settles the obligation for its recorded amount or incurs a gain or loss. The Company's asset retirement obligations are primarily the result of the legal obligation to remove leasehold improvements upon termination of leases or plant closures at several of its facilities. The measurement of such obligations is recorded at fair value, which the Company estimates by discounting projected cash flows using its credit-adjusted risk-free rate applicable at that time. The depreciation and accretion expenses recorded for the first quarters ended March 31, 2005 and March 31, 2004 were not significant.

In March 2005, the FASB issued FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations," (FIN 47). FIN 47 clarifies that the term "conditional asset retirement obligation" as used in FASB Statement No. 143, "Accounting for Asset Retirement Obligations," refers to a legal obligation to perform an asset retirement activity in which the timing and/or method of settlement are conditional on a future event that may or may not be within the control of the entity. Accordingly, an entity is required to recognize a liability for the fair value of a conditional asset retirement obligation if the fair value of the liability can be reasonably estimated. FIN 47 is effective no later than the end of fiscal years ending after December 15, 2005. Retrospective application for interim financial information is permitted but is not required. The Company has yet to determine the impact, if any, of FIN 47 on its consolidated earnings.

On May 27, 2004, the Company pled guilty to violation of the U.S. antitrust laws in connection with the sale of certain rubber chemicals, and the court imposed a fine of $50.0 million, payable in six annual installments, without interest, beginning in 2004. On May 28, 2004, the Company pled guilty to violation of the Canadian competition laws, and the court imposed a fine of CDN $9.0 million (approximately U.S. $7 million), payable in six annual installments, without interest, beginning in 2004. The Company paid $2.3 million in cash in 2004 for the U.S. and Canadian fines. Remaining cash payments for the U.S. and Canadian fines are expected to equal approximately $2.3 million in the second quarter of 2005; $6.5 million in 2006; $11.2 million in 2007; $16.2 million in 2008; and $18.5 million in 2009. The Company recorded a pre-tax charge of $45.2 million against results of operations at December 31, 2003, to reserve for the payment of the U.S. and Canadian fines. The Company and certain of its subsidiaries continue to be the subject of a coordinated civil investigation by the European Commission (the

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"EC") with respect to the sale and marketing of rubber chemicals. At this time, the Company cannot predict the timing or outcome of that investigation, including the amount of any fine that may be imposed by the EC.

The Company and certain of its subsidiaries are subjects of, and continue to cooperate in, coordinated criminal and civil investigations being conducted by the U.S. Department of Justice, the Canadian Competition Bureau and the EC (collectively, the "Governmental Authorities") with respect to possible antitrust violations relating to the sale and marketing of certain other products, including ethylene propylene diene monomer (EPDM); heat stabilizers, including tin-based stabilizers and precursors, mixed metal stabilizers, and epoxidized soybean oil (ESBO); nitrile rubber; and urethanes and urethane chemicals. The Company and its subsidiaries that are subject to the investigations have received from each of the Governmental Authorities verbal or written assurances of conditional amnesty from prosecution and fines.

On August 11, 2004, the Company and plaintiff class representatives entered into a settlement agreement that resolves, with respect to the Company, a single, consolidated direct purchaser class action lawsuit against the Company and other companies, principally alleging that the defendants conspired to fix, raise, maintain or stabilize prices for plastics additives sold in the United States in violation of Section 1 of the Sherman Act and that this caused injury to the plaintiffs who paid artificially inflated prices for such products as a result of such alleged anticompetitive activities. Under this settlement agreement, the Company paid $5.0 million to a settlement fund in exchange for the final dismissal with prejudice of the lawsuit as to the Company and a complete release of all claims against the Company set forth in the lawsuit. The court granted final approval of this settlement agreement in January 2005.

On January 11, 2005, the Company and plaintiff class representatives entered into a global settlement agreement that is intended to resolve, with respect to the Company, three consolidated direct purchaser class action lawsuits against the Company, its subsidiary Uniroyal Chemical Company, Inc. (now known as Crompton Manufacturing) and other companies, principally alleging that the defendants conspired to fix, raise, maintain or stabilize prices for EPDM, nitrile rubber and rubber chemicals, as applicable, sold in the United States in violation of Section 1 of the Sherman Act and that this caused injury to the plaintiffs who paid artificially inflated prices for such products as a result of such alleged anticompetitive activities. Under this global settlement agreement, the Company agreed to pay $97.0 million to a settlement fund in exchange for the final dismissal with prejudice of the foregoing three lawsuits as to the Company and a complete release of all claims against the Company set forth in the lawsuits. After the plaintiffs were unable to agree upon the allocation of the settlement funds, a neutral party established the allocation among the product classes, with $62.0 million allocated to rubber chemicals, $30.0 million to EPDM and $5.0 million to nitrile rubber. The parties entered into Implementing Settlement Agreements for the applicable affected actions. Following an initial payment of $0.5 million to an escrow account, the Company will pay the settlement funds to an escrow account in three installments, without interest, beginning at preliminary approval of the Implementing Settlement Agreements by the applicable courts and continuing through the later of 20 days following final approval of the settlement by each applicable court or June 30, 2006. The Implementing Settlement Agreements were preliminarily approved by the applicable courts in April 2005. As a result, the Company will make a payment of $58.0 million into court escrow in May 2005. The Company has the right to rescind the Global Settlement Agreement in its entirety under certain circumstances. The Company recorded a pre-tax antitrust charge of $93.1 million at December 31, 2004 to reserve for the payment of the expected settlement of the three direct purchaser class action lawsuits. This charge is only partially deductible for tax purposes.

The Company and certain of its subsidiaries, together with other companies, remain or have become defendants in certain U.S. federal direct purchaser and state direct and indirect purchaser lawsuits principally alleging that the defendants conspired to fix, raise, maintain, or stabilize prices for rubber chemicals, EPDM, polychloroprene, plastics additives, including impact modifiers and processing aids, nitrile rubber, and urethanes and urethane chemicals in violation of federal and state law. In addition, the Company and certain of its subsidiaries, together with other companies, remain or have become defendants in certain lawsuits filed in Canada principally alleging that the Company conspired with other defendants to restrain unduly competition in the sale of rubber chemicals or EPDM, as applicable, and to inflate artificially the sale price of the rubber chemicals or EPDM, as applicable, in violation of Canada's Competition Act. The Company, certain of its former officers and directors and certain former directors of the Company's predecessor Witco Corporation are also defendants in a consolidated federal securities class action lawsuit principally alleging that the Company and certain of its former officers and directors caused the Company to issue false and misleading statements that violated the federal securities laws by reporting inflated financial results resulting from an alleged illegal, undisclosed price-fixing conspiracy. In addition, certain current directors and one former director and officer of the Company are defendants in a shareholder derivative lawsuit, nominally brought on behalf of the Company, principally alleging that the individual defendants breached their fiduciary duties by causing or allowing the Company to issue false and misleading financial statements by inflating financial results as a result of an illegal, undisclosed price-fixing conspiracy. These actions are in early procedural stages of litigation and, accordingly, the Company cannot predict their outcome. The Company will seek cost-effective resolutions to the various pending and threatened legal proceedings and governmental investigations regarding the Company's operations.

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The Company's antitrust costs decreased from $96.9 million (pre-tax) during the immediately prior fiscal quarter ended December 31, 2004 to $3.2 million (pre-tax) for the fiscal quarter ended March 31, 2005. The Company's antitrust costs for the fiscal quarter ended December 31, 2004 included a charge of $93.1 million in connection with the anticipated settlement of three direct purchaser class action lawsuits against the Company and certain of its subsidiaries relating to rubber chemicals, EPDM and nitrile rubber (as described above). The Company expects to continue to incur substantial costs until all antitrust investigations are concluded and civil claims are resolved.

The Company has not recorded a charge for potential liabilities and expenses in connection with the coordinated civil investigation by the EC or with the civil claims, because it is not yet able to reasonably estimate a reserve for such potential costs. The resolution of the coordinated civil investigation by the EC and any civil claims now pending or hereafter asserted against the Company or any of its subsidiaries could have a material adverse effect on the Company's financial condition, results of operations and prospects.

The Company believes that the antitrust investigations and related lawsuits have not had a significant impact on the businesses subject to the investigations or any of the other businesses of the Company. The Company has not identified any impact that the investigations and lawsuits have had on sales prices or volume.

Each quarter, the Company evaluates and reviews estimates for future remediation and other costs to determine appropriate environmental reserve amounts. For each site, a determination is made of the specific measures that are believed to be required to remediate the site, the estimated total cost to carry out the remediation plan, the portion of the total remediation costs to be borne by the Company and the anticipated time frame over which payments toward the remediation plan will occur. The total amount accrued for such environmental liabilities at March 31, 2005, was $113.2 million. The Company estimates the potential currently determinable environmental liability to range from $102 million to $124 million at March 31, 2005. The Company's reserves include estimates for determinable clean-up costs. At a number of these sites, the extent of contamination has not yet been fully investigated or the final scope of remediation is not yet determinable. The Company intends to assert all meritorious legal defenses and other equitable factors that are available with respect to these matters, and believes that the likelihood of a material adverse effect resulting from the currently indeterminable clean-up costs is remote. However, the final cost of clean-up at these sites could exceed the Company's present estimates, and could have, individually or in the aggregate, a material adverse effect on the Company's financial condition, results of operations and cash flows. It is reasonably possible that the Company's estimates for environmental remediation liabilities may change in the future should additional sites be identified, further remediation measures be required or undertaken, current laws and regulations be modified or additional environmental laws and regulations be enacted.

The Company and some of its subsidiaries have been identified by federal, state or local governmental agencies, and by other potentially responsible parties (a "PRP") under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, or comparable state statutes, as a PRP with respect to costs associated with waste disposal sites at various locations in the United States. Because these regulations have been construed to authorize joint and several liability, the EPA could seek to recover all costs involving a waste disposal site from any one of the PRP's for such site, including the Company, despite the involvement of other PRP's. In many cases, the Company is one of several hundred PRP's so identified. In a few instances, the Company is one of only a handful of PRP's, and at one site, the Company is the only PRP performing investigation and remediation. Where other financially responsible PRP's are involved, the Company expects that any ultimate liability resulting from such matters will be apportioned between the Company and such other parties. In addition, the Company is involved with environmental remediation and compliance activities at some of its current and former sites in the United States and abroad.

Vertac Litigation-As previously disclosed in Crompton's Annual Report on Form 10-K for the fiscal year ended December 31, 2004, Uniroyal Chemical Company, Inc., (a wholly owned subsidiary of Crompton) and its Canadian subsidiary, Uniroyal Chemical Co./Cie were joined with others as defendants in consolidated civil actions brought in the United States District Court, Eastern District of Arkansas, Western Division (the "Court") by the United States of America, the State of Arkansas and Hercules Incorporated ("Hercules"), relating to a Vertac Chemical Corporation site in Jacksonville, Arkansas. Uniroyal Chemical Company, Inc. was subsequently dismissed from the action.

On March 30, 2005, the Court entered a memorandum opinion and order finding no basis for Hercules' claim of divisibility of harm for the damages arising from the remediation for which Hercules and Uniroyal Chemical Company Co./Cie had previously been found jointly and severally liable. The Court also rejected challenges to the constitutionality of CERCLA and its application in this case. Further, the Court affirmed its earlier findings regarding allocation. The net result of the memorandum opinion and order is the allocation of liability upon Uniroyal Chemical Company Co./Cie of 2.6 percent of the damages imposed jointly and severally upon Uniroyal Chemical Company Co./Cie and Hercules. This finding returns the

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parties to the positions held following the Court's February 3, 2002, order, which resulted in liability upon Uniroyal Chemical Company Co./Cie to the United States for approximately $2.3 million and liability to Hercules for contribution for approximately $0.7 million. It is anticipated that Hercules and Uniroyal Chemical Company Co./Cie will appeal the findings of the Court regarding the constitutionality of CERCLA. It is further anticipated that Hercules will appeal the divisibility findings and the allocation finding. The appeal to the Eighth Circuit Court of Appeals can be expected to take up to eighteen months before judgment. Assuming the Eighth Circuit Court of Appeals affirms all issues, Uniroyal Chemical Company Co./Cie may elect to petition for certiorari before the United States Supreme Court on the issue of its liability as an "arranger" under the CERCLA statutory scheme.

Petrolia - In March 2004, the Company and other entities that conduct or conducted business near the Petrolia, Pennsylvania facility were named as defendants in a toxic tort class action lawsuit filed in the Court of Common Pleas of Butler County, Pennsylvania, claiming damages allegedly arising from alleged contamination in and around the Bear Creek Area Chemical Site. In addition to seeking property damage, damages for personal injury, punitive damages and other compensatory damages, plaintiffs also seek injunctive relief to cleanup up the alleged contamination, response costs and medical monitoring. Plaintiffs have not yet set out in their pleadings a claim for a specific amount of damages. This action is in the early stages of litigation and the Company cannot predict its outcome.

The Company intends to assert all meritorious legal defenses and other equitable factors that are available with respect to these matters, and believes that the likelihood of a material adverse effect resulting from the currently indeterminable remedial costs or damages is remote. However, the resolution of the environmental matters now pending or hereafter asserted against the Company or any of its subsidiaries could require the Company to pay remedial costs or damages in excess of its present estimates, and as a result could, either individually or in the aggregate, have a material adverse effect on the Company's financial condition, results of operations and cash flows.

The Company has standby letters of credit and guarantees with various financial institutions. At March 31, 2005 and December 31, 2004, the Company had $80.6 million and $64.9 million, respectively, of outstanding letters of credit and guarantees primarily related to its environmental remediation liabilities, insurance obligations, a potential tax exposure and a customer guarantee. For losses that the Company believes are probable and which are estimable, the Company has accrued for such amounts in its condensed consolidated balance sheets.

The Company evaluates a segment's performance based on several factors, of which the primary factor is operating profit (loss). In computing operating profit (loss) by segment, the following items have not been deducted: (1) general corporate expense; (2) amortization; (3) unabsorbed overhead expense from discontinued operations; (4) facility closures, severance and related costs; and (5) antitrust costs. These items have been excluded from the Company's presentation of segment operating profit (loss) because they are not reported to the chief operating decision maker for purposes of allocating resources among reporting segments or assessing segment performance.

General corporate expense includes costs and expenses that are of a general corporate nature or managed on a corporate basis, including amortization expense. These costs are primarily for corporate administration services, costs related to corporate headquarters and management compensation plan expenses related to executives and corporate managers. Unabsorbed overhead expense from discontinued operations represents corporate costs that were previously allocated to the Refined Products business, which has been classified as a discontinued operation beginning in the first quarter of 2005. Facility closures, severance and related costs are costs related to the Company's 2004 activity-based restructuring initiative, the cost reduction initiatives that began in 2001 and 2003 and the relocation of the corporate headquarters that began in 2002. The antitrust costs are primarily for legal costs associated with antitrust investigations and related civil lawsuits.

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