Crompton Corporation
former chemical company
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.
History
Crompton Corporation traced its origins to 1837 when founder William Crompton invented a loom for weaving patterns in cotton, an innovation that led in the 1840s to the founding of Crompton Loom Works in Worcester, Massachusetts by his son George Crompton. The company merged in 1879 with rival Knowles Brothers to form the Crompton & Knowles Loom Works.
In 1999, Crompton & Knowles and Witco Corporation announced an intent to form C & K Witco Corporation. The merger was completed in 2000. Shortly after the merger, the name of the company was changed to Crompton Corporation.
In 2005, Crompton merged with Great Lakes Chemical Corporation of West Lafayette, Indiana, to form Chemtura, headquartered in Philadelphia.
“Crompton Corporation” enters the record as former chemical company. Crown Archives preserves that source wording while asking what Crompton, Corporation and former can confirm, complicate or overturn.
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“Crompton Corporation” is worth following because a concise public description often conceals a longer documentary argument. Here, Crompton, Corporation and former provides the most credible route into that argument.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jun 15, 2026. The linked authority identifier is Q5187638. The first chronological checks are 2005, 1837, 1879 and 1999.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Crompton Corporation” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.