GREAT LAKES INCREASES PRICES OF ALL BROMINE AND PHOSPHORUS SPECIALTY CHEMICALS

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced it will increase prices worldwide by up to 20 percent for all bromine and phosphorus based specialty chemicals within its Polymer Additives division, with the exception of phosphite antioxidants, effective for shipments May 24, 2004, or as contracts allow. These price increases are in addition to all other increases previously announced.

GREAT LAKES AND OXYCHEM COMPLETE 50-50 ANTIMONY OXIDE JOINT VENTURE

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced that the company has completed a transaction that will merge its antimony business with OxyChem’s Laurel Industries unit in a 50-50 joint venture, GLCC Laurel, LLC.

GREAT LAKES INCREASES ANTIOXIDANT PRICES

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced it would increase prices worldwide by 10 percent for its main antioxidants including Alkanox® 240, Anox® 20, and Anox® PP-18, effective for shipments after April 15, 2004, or as contracts allow. The price for Anox® NDB® (No Dust Blends) and other blends will also increase dependent upon main antioxidant content and value.

GREAT LAKES INCREASES FLAME RETARDANT PRICES

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced it would increase prices worldwide by an average of 15 percent for phosphate ester flame retardants and 10 percent for a range of brominated flame retardants, effective for shipments after April 15, 2004, or as contracts allow. These price increases are in addition to the 7 percent increase for phosphate ester flame retardants that took effect March 1, 2004, and brominated flame retardant price increases that were announced previously.

GREAT LAKES AND OXYCHEM FORM ANTIMONY OXIDE JOINT VENTURE

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) and Laurel Industries, Inc., a part of the chemicals operations (“OxyChem”) of Occidental Petroleum Corporation, will combine their antimony businesses as part of a joint venture to develop, produce, and market antimony-based flame retardants, synergists, and catalysts, the companies announced today.

GREAT LAKES ADDS CLEARLITE NUCLEATING AND CLARIFYING AGENTS TO ITS POLYMER ADDITIVES PORTFOLIO

Clearlite NU 005 is a sorbitol-based product that in addition to its nucleating function also acts as a clarifying agent, which reduces haze and significantly increases polymer transparency. INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced the introduction of Clearlite NU 004 nucleating agent and Clearlite NU 005 nucleating and clarifying agent to its extensive portfolio of polymer additives.

GREAT LAKES ANNOUNCES PRICE INCREASE FOR A RANGE OF BROMINATED FLAME RETARDANTS

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced that effective for all shipments after April 1, 2004, where contracts allow, the company will increase the price for pentabromodiphenyl oxide based flame retardants and all grades of brominated carbonate oligomers by $0.10/lb or $220/MT globally.

GREAT LAKES INCREASES ANTIMONY TRIOXIDE FLAME RETARDANT PRICES

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced that effective for shipments after March 29, 2004, where contracts allow, the company will increase the price for all grades of antimony trioxide by $0.15/lb in the Americas and by $330/MT in Europe and the Asia Pacific region. The price for other antimony derivatives will also increase dependent upon antimony content. This price increase is in addition to the increase of $0.25/lb in the Americas and $550/MT in Europe and the Asia Pacific region that took effect January 23, 2004.

GREAT LAKES ANNOUNCES PHOSPHATE ESTERS PRICE INCREASES

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced a worldwide list and off-list price increase of 7% for phosphate esters, effective for shipments as of March 1, 2004, where contracts allow. The price increase applies to the following products:

GREAT LAKES LAUNCHES FIREMASTER® BP411 BROMINATED POLYSTYRENE FLAME RETARDANT

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced the launch of Firemaster® BP411, a brominated polystyrene flame retardant additive for electrical component applications.

Great Lakes increases antimony trioxide flame retardant prices

INDIANAPOLIS, INDIANA—Great Lakes Chemical Corporation (NYSE:GLK) today announced that effective for shipments after January 23, 2004, where contracts allow, the company will increase the price for all grades of antimony trioxide by $0.25/lb in the Americas and by $550/mt in Europe and the Asia Pacific region. The price for other antimony derivatives will also increase dependent upon antimony content.

FIREMASTER® 550: Factsheet

* Great Lakes Chemical Corporation will replace Penta-PBDE with a new product called Firemaster® 550. The U.S. Environmental Protection Agency (EPA) has completed preliminary studies of the penta replacement and determined that it does not meet the standards that would necessitate categorizing it as a PBT. This means that the new product is not Persistent in the environment, Bioaccumulative in organisms or Eco-Toxic.