HUNT VALLEY, Md., June 28 /PRNewswire-FirstCall/ -- Lyondell Chemical Company (NYSE: LYO) is increasing its prices for all rutile and anatase Tiona(R) titanium dioxide (TiO2) products sold to all end-use markets in Asia, Central and South America and in North America, effective on July 1, 2005 or as contracts allow. Prices will increase as follows:

     *  In Asia, prices will increase by US $100 per metric ton (pmt)
     *  In Central and South America, prices will increase by US $100 pmt
     *  In the North America, prices will increase by US $0.04 per pound

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 Chemicals is a wholly-owned subsidiary of Lyondell.

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

SOURCE: Lyondell Chemical Company

CONTACT: Amy Drusano, Manager - Communications of Lyondell Chemical Company, +1-410-229-8062