In 1953, formula EQ-53, for an emulsifiable DDT concentrate for use in homes and commercial laundries to mothproof washable woolens, was released to the public by the United States Department of Agriculture "after four years of experimentation".Chronological History of the Development of Insecticides and Control Equipment from 1854 through 1954 USDA Agricultural Research Service The concentrate contained 25% DDT, 1% non-ionic detergent emulsifier, and 65% aromatic hydrocarbon solvent.
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