Arch Chemicals, Inc. Names Mark E. Faford Vice President

Mark E. Faford has been named vice president, investor relations and corporate communications of Arch Chemicals, Inc. (NYSE: ARJ). Mr. Faford will continue to serve as the Company’s primary contact with the investment and media communities.

He has been with Arch since its 1999 spinoff from Olin Corporation (and had been with Olin since 1977). He has held various positions within Arch’s finance department and has been involved in the Company’s mergers, acquisitions and divestitures, including the 2003 divestiture of the Company’s Sulfuric Acid business, where he served as general manager.

He holds a B.S. degree in accounting from Pennsylvania State University and an MBA in Finance from the University of Connecticut. He is a member of the National Investor Relations Institute and, from July 2005 through 2008, served as liaison between Arch’s CEO Mike Campbell and the Advisory Committee for Trade Policy and Negotiations (ACTPN), the principal trade advisory committee providing overall policy advice on trade matters to the Office of the U.S. Trade Representative (USTR).

Mr. Faford is located at Arch Chemicals’ headquarters in Norwalk, Connecticut.

Headquartered in Norwalk, Connecticut (USA), Arch Chemicals, Inc. is a global Biocides company with annual sales of approximately $1.5 billion. Arch and its subsidiaries provide innovative, chemistry-based solutions to control the growth of harmful microbes. The Company’s concentration is in water treatment, hair and skin care products, treated wood, paints and coatings, building products and health and hygiene applications. Arch Chemicals operates in two segments: Treatment Products and Performance Products. Together with its subsidiaries, Arch has approximately 3,000 employees and manufacturing and customer-support facilities in North and South America, Europe, Asia, Australia and Africa.