Chemical Industry Veterans David Lilley and William Powell Elected to Arch Chemicals' Board of Directors.

NORWALK, Conn. -- David Lilley, Chairman, President and CEO of Cytec Industries Inc., and William H. Powell, the recently retired Chairman and CEO of National Starch and Chemical Company, have been elected to Arch Chemicals' (NYSE: ARJ) Board of Directors. Mr. Lilley is serving as a member of the Corporate Governance Committee, while Mr. Powell is a member of the Corporate Governance and Compensation Committees.

A veteran of the global chemical and medical equipment industries, Mr. Lilley has since 1999 led Cytec Industries, a $3-plus billion manufacturer of chemicals used to make engineered materials, adhesives, automotive coatings and other specialty products. During this time, he has strengthened its focus on high performing businesses and expanded its international presence. Mr. Lilley earned his MA in chemical engineering in 1969 from Fitzwilliam College, Cambridge University, England.

Mr. Powell has 30 years of experience in the chemical industry, during which time he gained invaluable experience in growing and building chemical businesses in Europe, Asia and Latin America. He served from 1999 until his retirement in 2006 as Chairman and CEO of National Starch and Chemical Company, a $3.6 billion subsidiary of the Imperial Chemical Group (ICI). It manufactures adhesives, specialty polymers for the personal care industry and industrial starches. After earning his MS in chemical engineering in 1968 from Case Western Reserve University, Mr. Powell served in the U.S. Air Force Strategic Air Command. He later obtained an MBA from the University of North Dakota.

"We at Arch are delighted to have these two prominent chemical industry leaders on our board," said Michael E. Campbell, Arch Chemicals' Chairman, President and CEO. "They bring a wealth of international business experience to Arch as well as knowledge of key Arch end-use markets such as hair and skin care products and industrial coatings. I was impressed with their leadership skills and valuable insights into the dynamic forces shaping our industry when I interacted with them at the American Chemistry Council and other industry associations."

Arch also announced that H. William Lichtenberger, the former Chairman and CEO of Praxair, Inc. and an Arch Board member since 1999, has retired from the Arch Board. "We deeply appreciate the wise counsel and guidance that Bill Lichtenberger provided to Arch during his eight years on our Board," said Mr. Campbell. "We wish him all the best in his well-deserved retirement."

With the two new board members, there are now eight individuals serving on Arch's Board, seven of whom are outside directors. In addition to Messrs. Campbell, Lilley and Powell, the Board members include Richard E. Cavanagh, former President and Chief Executive Officer, The Conference Board, Inc.; Michael O. Magdol, former Vice Chairman, Fiduciary Trust Company International; Daniel S. Sanders, former President, ExxonMobil Chemical Company; Dr. Janice J. Teal, Group Vice President and Chief Science Officer, Avon Products, Inc.; and Douglas J. Wetmore, Senior Vice President and Chief Financial Officer, International Flavors and Fragrances.

Headquartered in Norwalk, Connecticut (USA), Arch Chemicals, Inc. is a global Biocides company with annual sales of approximately $1.4 billion. Arch and its subsidiaries provide innovative, chemistry-based solutions to control the growth of harmful microbes. The Company's concentration is in water, hair and skin care products, pressure-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. For more information, visit www.archchemicals.com.