(2,4-dichlorophenoxy)acetic acid, butyl ester, mixture with butyl (2,4,5-trichlorophenoxy)acetate; an herbicide and chemical defoliant.

A herbicide that contains equal parts of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), as well as traces of the contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin.

Code name for a synthetic defoliant developed for military use. Agent Orange is a mixture of two chemicals, 2,4, dichlorophenoxyacetic acid (2,4-D) and 2,4,5 trichlorophenoxyacetic acid (2,4,5-T). The toxicity of Agent Orange is due to by-products from metabolic processes upon intake. The toxic by products are dioxin derivatives, which have been linked to the wasting syndrome, gastric ulcer, cancer, immunotoxicity, hepatotoxicity, vascular lesions, teratogenicity, and impaired reproductive performance. (NCI04)