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| Company type | Merged |
|---|---|
| Predecessor | Crompton Loom Works Crompton & Knowles Loom Works Witco Corporation |
| Founded | Worcester, Massachusetts (1837) |
| Founder | William Crompton |
| Defunct | 2005 |
| Fate | Acquired by Chemtura Corporation |
| Successor | Chemtura Corporation |
| Headquarters | , |
Area served | International |
| Products | Fine chemicals, inorganic compounds |
Crompton Corporation (NYSE: CK, formerly Crompton and Knowles) was a chemical research, production, sales and distribution company headquartered in Middlebury, Connecticut. The company produced specialty chemicals used for polymers, fire suppressants and retardants, pool and spa water purification systems and various other applications. In 2005, Crompton merged with Great Lakes Chemical Corporation to become Chemtura.
It was listed on the New York Stock Exchange under CK ticker symbol.