FIRST AMENDMENT dated as of October 26, 2000, to the 364-DAY CREDIT AGREEMENT, dated as of October 28, 1999 among CROMPTON CORPORATION (formerly CK Witco Corporation), the Eligible Subsidiaries referred to therein, the BANKS listed on the signature pages thereof, THE CHASE MANHATTAN BANK, as Syndication Agent, CITIBANK, N.A., as Administrative Agent, BANK OF AMERICA, N.A. and DEUTSCHE BANK SECURITIES INC., as Co-Documentation Agents, and CHASE SECURITIES INC., as Lead Arranger and Sole Book Manager (the "First Amendment").WHEREAS, the Company, the Eligible Subsidiaries, certain Banks, the Co-Documentation Agents, the Syndication Agent and the Administrative Agent are parties to the 364-Day Credit Agreement dated as of October 28, 1999 (the "Original Credit Agreement"); WHEREAS, the Company has requested that the Banks amend the Original Credit Agreement by (i) changing the definition of Termination Date and (ii) amending the representations contained in Section 4.04 of the Original Agreement, all as provided below; WHEREAS, the Company and Banks have agreed to reduce the Commitments to $191,600,000; WHEREAS, the undersigned Banks are willing, on the terms and subject to the conditions set forth herein, to approve such amendment; WHEREAS, capitalized terms used but not defined herein have the meanings assigned to them in the Original Credit Agreement as amended hereby; NOW, THEREFORE, in consideration of these premises, the Company and the undersigned Banks hereby agree as follows: SECTION 1. Amendment. Effective as of the date hereof, the Original Credit Agreement, including all schedules and exhibits thereto, is hereby amended as expressly provided herein, and all rights and obligations of the Company, the Banks and the Administrative Agent under the Original Credit Agreement (including accrued fees) shall continue as rights and obligations of such parties under the Original Credit Agreement, in each case amended as provided below: (a) The definition of "Termination Date" in Section 1.01 of the Original Credit Agreement is hereby replaced in its entirety with the following: "'Termination Date' means October 25, 2001, or, if such date is not a Euro-dollar Business Day, the next preceding Euro- Dollar Business Day or, in the case of any Bank, any later date to which the Termination Date shall have been extended as to such Bank pursuant to Section 2." (b) Section 4.04 of the Original Credit Agreement is hereby replaced in its entirety with the following: SECTION 4.04. Financial Information. (a) The unaudited consolidated balance sheet of the Company and its Consolidated Subsidiaries as of June 30, 2000 and the related unaudited consolidated statement of operations for the six months then ended, a copy of which has been delivered to each of the Banks, fairly present, in conformity with generally accepted accounting principles, the consolidated financial position of the Company and its Consolidated Subsidiaries as of such date and their consolidated results of operations for such fiscal year. (b) Since December 31, 1999, there has been no material adverse change in the business, financial position or results of operations of the Company and its Consolidated Subsidiaries, considered as a whole. (c) From and after the effective date of this First Amendment, all references in the Original Credit Agreement to the signature pages thereof shall mean and refer to the signature pages attached hereto. SECTION 2. Representations and Warranties. The representations and warranties set forth in Article IV of the Original Credit Agreement, as amended by this First Amendment, shall be deemed to have been repeated in this First Amendment on and as of the date hereof, with all references to "this Agreement" being deemed to refer to the Original Credit Agreement, as amended by this First Amendment. SECTION 3. Effectiveness. This First Amendment shall become effective on the date on which the Syndication Agent shall have received counterparts of this First Amendment that, when taken together, bear the signatures of the Company, the Banks and the Syndication Agent. SECTION 4. Applicable Law. This First Amendment shall be construed in accordance with and governed by the law of the State of New York. SECTION 5. Counterparts. This First Amendment may be executed in two or more counterparts, each of which shall constitute an original, but all of which when taken together shall constitute but one contract. Delivery of an executed counterpart of a signature page of this First Amendment by facsimile transmission shall be as effective as delivery of a manually executed counterpart hereof. SECTION 6. Headings. Section headings used herein are for convenience of reference only, are not part of, and are not to be taken into consideration in interpreting, this First Amendment. SECTION 7. Expenses. The Company shall reimburse the Syndication Agent for its expenses in connection with this First Amendment as separately agreed with the Syndication Agent. IN WITNESS WHEREOF, the Company, the Administrative Agent and the undersigned Banks have caused this Amendment to be duly executed by their duly authorized officers, all as of the date first above written. CROMPTON CORPORATION, By Name: John R. Jepsen Title: Treasurer Address: One American Lane Greenwich, CT 06831 Phone: (203) 552-3175 Facsimile: (203) 552-2868 Banks BANK OF AMERICA, N.A., By Name: Title: 335 Madison Avenue New York, NY 10017 Attention: Wendy Gorman Facsimile number: 212-503-7878 DEUTSCHE BANK AG NEW YORK BRANCH a/o CAYMAN ISLANDS BRANCH, By Name: Title: By Name: Title: 31 W. 52nd Street New York, NY 10019 Attention: Jean Hannigan Facsimile number: 212-469-3632 MELLON BANK, N.A., By Name: Title: One Mellon Bank Center Pittsburgh, PA 15258 Attention: Facsimile number: With copy to: Attention: Facsimile number: FLEET NATIONAL BANK, By Name: Title: 1 Federal Street Boston, MA 02110 Attention: Patrick Keffer Facsimile number: 617-346-0585 COMMERZBANK AG NEW YORK AND GRAND CAYMAN BRANCHES By Name: Title: By Name: Title: FOUR WINDS FUNDING CORPORATION, as Designee, By Name: Title: By Name: Title: 2 World Financial Center New York, NY 10281 Attention: Peter Doyle Fascsimile number: 212-266-7594 ABN AMRO BANK N.V., By Name: Title: By Name: Title: 500 Park Avenue New York, NY 10022 Attention: Patricia McMillian Facsimile number: 212-446-4237 THE BANK OF NEW YORK, By Name: Title: One Wall Street New York, NY 10286 Attention: Kenneth Sneider, Jr. Facsimile number: 212-635-6999 FIRST UNION NATIONAL BANK, By Name: Title: 300 Main Street Stamford, CT 06904-0700 Attention: Stephen Dorosh Facsimile number: 203-357-1418 BANCA COMMERCIALE ITALIANA, NEW YORK BRANCH, By Name: Title: By Name: Title: One William Street New York, NY 10004 Attention: Joseph Carlani Facsimile number: 212-809-2124 With copy to: Attention: Frank Maffei Facsimile number: 212-809-2124 FORTIS (USA) FINANCE LLC, By Name: Title: By Name: Title: 520 Madison Ave., 3rd Floor New York, NY 10022 Attention: Silvana Burdick Facsimile: 212-750-9597 BANCA MONTE DEI PASCHI DI SIENA S.P.A. By Name: Title: By Name: Title: 55 East 59th Street New York, NY 10022 Attention: Nicolas Kanaris Facsimile number: 212-891-3661 THE BANK OF NOVA SCOTIA, By Name: Title: One Liberty Plaza New York, NY 10006 Attention: Kevin McCarthy Facsimile number: 212-228-5090 WESTDEUTSCHE LANDESBANK GIROZENTRALE, NEW YORK BRANCH, By Name: Title: By Name: Title: 1211 Avenue of the Americas New York, NY 10036 Attention: Lisa M. Walker Facsimile number: 212-852-6148 BANK OF TOKYO-MITSUBISHI TRUST COMPANY, By Name: Title: 1251 Avenue of the Americas New York, NY 10020-1104 Attention: Pamela Donnelly Facsimile number: 212-782-6445 BNP PARIBAS, as successor to BANQUE NATIONALE DE PARIS, By Name: Title: 919 Third Avenue New York, NY 10022 Attention: Sophie Kaufman Facsimile number: 212-415-9606 BANCA NAZIONALE DEL LAVORO S.P.A. - NEW YORK BRANCH, By Name: Title: By Name: Title: 25 West 51st Street New York, NY 10019 Attention: Giulio Giovine Facsimile number: 212-765-2978 SUNTRUST BANK, By Name: Title: 711 Fifth Avenue, 16th Floor New York, NY 10022 Attention: Armen Karozichian Facsimile number: 212-371-9386 BBL INTERNATIONAL (U.K.) LIMITED, By Name: Title: 6 Broadgate London EC2M 2AJ England Attention: Sally Taylor Facsimile number: 0171-562-0208 PEOPLE'S BANK, By Name: Title: 350 Bedford Street Stamford, CT 06901 Attention: Frank Cory Facsimile number: 203-359-6146 HIBERNIA NATIONAL BANK, By Name: Title: 313 Carondelet Street New Orleans, LA 70130 Attention: Spencer Gagnet Facsimile number: 504-533-5434 CITIBANK, N.A., individually and as Administrative Agent, By Name: Title: 399 Park Avenue, 4th Fl., Zone 16 New York, NY 10043 Attention: Carolyn Sheridan Facsimile number: 212-866-2371 THE CHASE MANHATTAN BANK, individually and as Syndication Agent, By Name: Title: 270 Park Avenue New York, NY 10017 Attention: Stacey Haimes Facsimile: 212-270-7939