HOUSTON, May 3 /PRNewswire-FirstCall/ -- On May 3, 2007, the Board of Directors of Lyondell Chemical Company (NYSE: LYO) declared a regular quarterly dividend of $0.225 per share of common stock to stockholders of record as of the close of business on May 25, 2007.

The regular quarterly dividend on each share of outstanding common stock is payable in cash on June 15, 2007.

Lyondell Chemical Company, headquartered in Houston, Texas, is North America's third-largest independent, publicly traded chemical company. Lyondell is a leading global manufacturer of chemicals and plastics, a refiner of heavy, high-sulfur crude oil and a significant producer of fuel products. Key products include ethylene, polyethylene, styrene, propylene, propylene oxide, titanium dioxide, gasoline, ultra low-sulfur diesel, MTBE and ETBE. Lyondell operates on five continents and employs nearly 11,000 people worldwide.

SOURCE: Lyondell Chemical Company

CONTACT: media, Lisa M. Martin-Walsh, +1-713-309-4890, or investors,
Douglas J. Pike, +1-713-309-7141, both of Lyondell Chemical Company

Web site: http://www.lyondell.com/