Hunt Valley, Md., June 28, 2006 – Lyondell Chemical Company is increasing its prices for all rutile and anatase Tiona® titanium dioxide (TiO2) products sold in North America to all end-use markets, effective July 1, 2006 or as contracts allow, by U.S. 4 cents per pound. Tiona® products are produced and sold by Millennium Inorganic Chemicals Inc., a Lyondell company.

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Lyondell Chemical Company, headquartered in Houston, Texas, is North America's third-largest independent, publicly traded chemical company. Lyondell is a major global manufacturer of basic chemicals and derivatives including ethylene, propylene, titanium dioxide, styrene, polyethylene, propylene oxide and acetyls. It also is a significant producer of gasoline blending components. The company has a 58.75 percent interest in LYONDELL-CITGO Refining LP, a refiner of heavy, high- sulfur crude oil. Lyondell is a global company operating on five continents and employs approximately 10,000 people worldwide. Millennium Specialty Chemicals is a wholly owned subsidiary of Lyondell.

Tiona is a registered trademark of Millennium Chemicals, a Lyondell company.