Arch Chemicals Named to Information Week 500 List for Innovative Use o

    Business Editors/Chemicals Writers

    NORWALK, Conn.--(BUSINESS WIRE)--Jan. 5, 2005--Arch Chemicals, Inc. (NYSE:ARJ) announced that it was named to CMP Media LLC's Information Week 500, a prestigious listing of the most innovative and productive users of information technology (IT) in the United States. Arch ranked sixth among the 15 American chemical companies recognized for IT innovation in 2004.
    The list identifies those organizations that exhibited best practices in a number of critical areas, including information technology productivity and measurement systems, cutting-edge technologies, IT spending as a percentage of overall sales, improvement tactics and IT staffing practices.
    Al Schmidt, Vice President, Information Technologies, credits Arch's place of honor in the Information Week 500 to the hard work and ingenuity of the Company's global IT professionals. Arch also has demonstrated leadership in the implementation of cutting-edge technologies such as Web-based E-commerce portals, business intelligence tools, customer resource management systems, business-process management software, networked storage and content-filtering anti-spam software. In addition, like the majority of the Information Week 500 honorees, Arch is making sure that its IT systems facilitate compliance with government regulations such as Sarbanes-Oxley financial reporting requirements and European Union privacy laws.
    Headquartered in Norwalk, Connecticut, Arch Chemicals, Inc. is a global specialty chemicals company with more than $1 billion in annual sales. Arch and its subsidiaries have leadership positions in Treatment and Performance Products, and they provide leading customers in these markets with forward-looking solutions to meet their chemical needs. Together with its subsidiaries, Arch has approximately 2,800 employees and manufacturing and customer-support facilities in North and South America, Europe, Asia and Africa.

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CONTACT: Arch Chemicals, Inc. Investor Contact: Mark E. Faford, 203-229-2654 or Press Contact: Dale N. Walter, 203-229-3033

KEYWORD: CONNECTICUT INDUSTRY KEYWORD: CHEMICALS/PLASTICS SOURCE: Arch Chemicals, Inc.

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