Crompton Fortifies Management Team.

MIDDLEBURY, Conn. -- Crompton Corporation (NYSE: CK) announced the following management appointments:

Robert B. Weiner, 52, is appointed executive vice president, Supply Chain Operations, effective Nov. 22. Incumbent Syl Turicchi will retire following a transition period. Since 2001, Weiner has served as executive vice president of Exide Technologies, where he was responsible for manufacturing; quality; procurement; logistics; and environmental, health and safety across their global network. His career includes seven years in executive operations positions at United Technology Corporation's Pratt & Whitney division and 16 years of manufacturing and quality control experience at General Electric Company.

John A. Lacadie, Ph.D., 58, has been appointed to the newly created position of vice president and chief technology officer, effective Nov. 1. He joined the company in 1976 as a research scientist and has held increasingly responsible positions over the last 28 years, serving since 2000 as vice president, technology for Crompton's Crop Protection business. Lacadie's broad research has resulted in two patents and more than a dozen publications. He is chairman of the Strategic Oversight Council for CropLife America and is a Six Sigma black belt.

"Operations and technology have been centralized and significantly restructured in order to focus Crompton's resources on key programs and maximize the use of our expertise to solve customer problems," said Robert L. Wood, chairman, president and chief executive officer.

Lynn A. Schefsky, 56, who joined the company as senior vice president and general counsel in July, will take on the added responsibilities of ethics and compliance, effective immediately. Schefsky came to Crompton from The Dow Chemical Company, where he held a number of increasingly responsible positions during his 19-year tenure, most recently as managing global counsel for Global Thermosets and automotive business law. He has extensive experience in environmental, human resources, insurance and contracting matters.

Eric Wisnefsky, 34, has been appointed vice president, corporate finance and treasurer, effective Nov. 1, replacing John Jepsen, who has resigned. Wisnefsky, a Certified Public Accountant, joined Crompton in 1998 as a manager of external reporting for Uniroyal Chemical and has served as the director of Financial Planning and Analysis since 2000. Previously, Wisnefsky held assistant controller positions at Direct Media and at Holberg Inc., where he participated in the acquisition of Pepsi Food Service. He began his career as a staff auditor at Price Waterhouse.

Kenneth L. Donahue, 46, joined Crompton as vice president and chief information officer (CIO) on Oct. 12. He has more than 20 years of experience in managing and engineering information technology strategy for a global enterprise. Donahue comes to Crompton from META Group, where he most recently served as senior vice president and CIO. He also held several information technology positions with General Reinsurance Corporation with responsibility for directing organizations in the United Kingdom, Germany and the U.S.

Richard M. Stewart, 46, will join Crompton Dec. 6 as director of internal audit. Stewart has more than 20 years of experience in the finance, operations and auditing functions and has extensive expertise with Sarbanes-Oxley. He comes to Crompton from the New York City Department of Education, where he serves as chief audit executive and executive director. Stewart's previous experience includes management positions at Equisearch and Entex, as well as serving as director of internal audit for Gartner, and program manager for IBM's corporate controller's finance and planning staff.

The company also announced two recent promotions:

David P. Godfrey, 48, was promoted to vice president, Human Resources at the end of June, with responsibility for the global Human Resources function, including benefits and compensation. Godfrey joined Crompton in 2002 as director of Human Resources after serving 22 years at Millennium Chemicals Inc. in various Human Resources positions, including director of Human Resources at the corporate level.

Marshall Moore, 40, was promoted to vice president, Six Sigma at the end of May and leads Six Sigma efforts throughout the company. Moore joined Crompton from General Electric Company in 2003 to lead Six Sigma efforts in the Specialty Chemicals business. He served as commercial master black belt for GE Specialty Chemicals and is a certified instructor of Six Sigma, Design for Six Sigma and advanced Design of Experiments.

"We are fortunate to have a group of talented professionals assuming key positions in this firm," said Wood. "I expect this group, along with the rest of the senior management team, to lead Crompton's transition into a leaner, more efficient organization."

Crompton Corporation, with annual sales of $2.2 billion, is a producer and marketer of specialty chemicals and polymer products and equipment. Additional information concerning Crompton Corporation is available at www.cromptoncorp.com.

Forward-Looking Statements

Certain statements made in this release are forward-looking statements that involve risks and uncertainties, including, but not limited to, general economic conditions, the outcome and timing of antitrust investigations and related civil lawsuits to which the Company is subject, the ability to obtain selling price increases, pension and other post-retirement benefit plan assumptions, energy and raw material prices and availability, production capacity, changes in interest rates and foreign currency exchange rates, changes in technology, market demand and customer requirements, the enactment of more stringent environmental laws and regulations, the ability to realize expected cost savings under the Company's cost reduction initiatives, the amount of any additional earn-out payments from GE, the ability to reduce the Company's debt levels, and other risks and uncertainties detailed in the Company's filings with the Securities and Exchange Commission. These statements are based on the Company's estimates and assumptions and on currently available information. The forward-looking statements include information concerning our possible or assumed future results of operations, and the Company's actual results may differ significantly from the results discussed. Forward-looking information is intended to reflect opinions as of the date this release was issued and such information will not necessarily be updated by the Company.