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Rohm and Haas made a significant contribution to the development of modern insecticides by shifting from highly persistent and bioaccumulative chemicals to compounds with improved environmental profiles. During the mid-twentieth century, the company focused on organophosphate insecticides as alternatives to organochlorines such as _________ _______ _________ ______ ________ _________ ________ _____ _______ _______ ___.
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