Molecule of the Week

2,4-Dichlorophenoxyacetic acid

August 27, 2012

2,4-Dichlorophenoxyacetic acid—“2,4-D” to millions of farmers—is one of the most widely used broadleaf herbicides in the world. Its preparation from 2,4-dichlorophenol and chloroacetic acid was reported by R. Pokorny in 1941, and it was developed as a major herbicide during World War II. Recently, EPA, in response to a petition from the Natural Resources Defense Council to ban 2-4D, declared that its approved uses are safe.

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