Warwick, the world's leading producer of a chemical additive in household detergents, employs 230 at its main manufacturing site and headquarters, and will use the Shanghai base to develop its business further in the growing Chinese market.

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This problem is compounded by the possible presence of multiple chemicals which together have an additive effect that greatly increases the lethal action of any single chemical.

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Kampen gobbled up smaller specialty chemical outfits using the ample cash generated by Octel Associates, a British gasoline lead-additive business.

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