Arch Chemicals, Inc.
501 Merritt 7
P.O. Box 5204
Norwalk, CT 06856-5204
March 23, 2010
VIA EDGAR TRANSMISSION
Securities and Exchange Commission
100 F Street, NE
Washington, D.C. 20549
| Re: | Arch Chemicals, Inc. |
| Definitive Proxy Statement |
| 2010 Annual Meeting of Shareholders |
| File No. 1-14601 |
Ladies and Gentlemen:
Enclosed for filing pursuant to Rule 14a-6 under the Securities Exchange Act of 1934, is a definitive copy of each of the following:
| 1. | Notice of Meeting of Shareholders and Proxy Statement for the Annual Meeting of Shareholders of Arch Chemicals, Inc. to be held May 4, 2010; and |
| 2. | Form of Proxy for shareholders of record, brokers and nominees, Arch Chemicals, Inc. Contributing Employee Ownership Plan participants for use in connection with said Annual Meeting. |
In response to Instruction 3 to Item 10 of Schedule 14A, Appendix A to the proxy statement is the amended and restated Arch Chemicals, Inc. Senior Management Incentive Compensation Plan which is an item for shareholder approval.
Copies of Items (1) and (2) above will also be sent to the New York Stock Exchange.
Mailing of such material to the Company’s shareholders will commence on or about March 26, 2010.
Sincerely,
/s/ Joseph P. Lacerenza
Joseph P. Lacerenza
Senior Deputy General Counsel
and Secretary