Witco Corporation
| Company type | Merged | 
|---|---|
| Industry | chemical | 
| Founded | Chicago, Illinois (1920) | 
| Founder | Robert Wishnick | 
| Defunct | 1999 | 
| Fate | Acquired by Crompton Corporation | 
| Successor | Crompton Corporation | 
| Headquarters | , | 
Area served  | International | 
| Products | petroleum products, specialty chemicals, materials for special applications | 
Number of employees  | 8000 | 
Witco Corporation (NYSE: WIT) was a manufacturer of specialty chemicals, petroleum products, and engineered materials headquartered in New York, New York. In 1999, Witco merged with Crompton & Knowles to form Crompton Corporation.