GREAT LAKES INCREASES PRICES OF BROMINE-BASED FLAME RETARDANTS FOR BUILDING AND CONSTRUCTION SEGMENTS

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced it will increase prices worldwide on Firemaster® 550/Firemaster® 552, Tetrabromophthalic anhydride (PHT4), Tetrabromophthalic anhydride derivatives, and HBCD (Hexabromocyclododecane) flame retardants. These price increases are in addition to all other increases previously announced and will be effective for shipments beginning July 1, 2005, or as contracts allow.

Prices for the Firemaster 550/Firemaster 552 series (proprietary phosphorus and bromine based blend), Tetrabromophthalic anhydride (PHT4) and Tetrabromophthalic anhydride derivatives will increase globally by up to $0.15/lb respectively. Prices for HBCD (Hexabromocyclododecane) will increase by up to 5% globally.

The company stated that the new pricing is necessary due to the unprecedented and rapidly increasing costs of key raw materials, energy products, and logistics which have also created significant availability concerns for certain key feed stocks. Additionally, these pricing actions are consistent with achieving profitability levels needed to support on-going investments required to meet rapidly expanding demand for flame retardant additives in the building and construction industry. Strong demand is driven by both expanding end use and fire safety regulatory requirements.

Great Lakes is the world’s leading producer of flame retardants with an aggressive commitment to technological innovation and product development. Offering the largest and broadest portfolio of flame retardants, Great Lakes products include bromine, phosphorus, and antimony-based flame retardants, other flame retardant synergists and smoke suppressants. These products protect against fire in plastics for consumer applications such as automotive, electrical, building materials, and furnishings. For more information about these product lines please visit the Great Lakes Flame Retardants website at www.fr.greatlakes.com.

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