Crompton Corporation Announces Annual Meeting of Stockholders and 2003 First Quarter Conference Call.

Business Editors

MIDDLEBURY, Conn.--(BUSINESS WIRE)--April 17, 2003

Crompton Corporation (NYSE: CK) will host its 2003 Annual Meeting of Stockholders at 11:15 a.m. eastern time, Tuesday, April 29, 2003 at the Sheraton Stamford Hotel, Stamford, CT.

Persons who cannot attend are invited to listen to the broadcast of the annual meeting in listen-only mode. To access the broadcast, dial [phone]. Replay will be available after 3:00 p.m., Tuesday, April 29th for two weeks. Playback of the broadcast can be accessed by dialing [phone] and entering access code 423534.

The company will release first quarter 2003 earnings before 9:30 a.m. eastern time on Tuesday, April 29, 2003. Copies of the release will be available on the investor relations section of the company's website, www.cromptoncorp.com.

At 1:30 p.m. eastern time, April 29th, Crompton will host a teleconference to review the 2003 first quarter results. A question-and-answer session will be held following management's remarks. Interested parties are asked to dial in approximately 10 minutes prior to the start time at [phone]. Replay of the call will be available for two weeks starting at 5:00 p.m. on April 29th. To access the replay, call [phone] and enter access code 497118.

Live internet access to both the Annual Meeting and the 2003 first quarter conference call will be available through the investor relations section of the company's website.

Crompton Corporation is a $2.5 billion global producer and marketer of specialty chemicals and polymer products and equipment. Additional information concerning Crompton Corporation is available at www.cromptoncorp.com.