GREAT LAKES INCREASES PENTABROMODIPHENYL OXIDE FLAME RETARDANT PRICES

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced that effective for shipments after September 15, 2003, where contracts allow, the company will increase the price for pentabromodiphenyl oxide based flame retardants by 10% in the European region.

The company reports that the new pricing for pentabromodiphenyl oxide-based flame retardants—Great Lakes DE-71™, Great Lakes DE-60F™ Special, Great Lakes DE-61™ and Great Lakes DE-62™—reflects the increased raw material and regulatory costs associated with the product line. These products provide the highest level of flame retardant performance for flexible polyurethane foam applications such as commercial furnishings and automotive foams.

Great Lakes is the leader in Flame Retardant technology. Through its Polymer Additives division, the company offers an extensive line of bromine-, phosphorus-, and antimony-based flame retardants and other synergists, as well as a full line of UV stabilizers, antioxidants, blends and optical monomers. For more information about these product lines, please visit the Great Lakes Polymer Additives web site at www.pa.greatlakes.com.

This press release contains forward-looking statements involving risks and uncertainties that affect the company’s operations as discussed in Great Lakes Chemical Corporation’s Annual Report on Form 10-K filed with the Securities and Exchange Commission. Accordingly, there is no assurance the company’s expectations will be realized.

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