An organophosphate pesticide. Malathion and parathion are other well-known organophosphate pesticides. The organophosphates inhibit the action of the enzyme cholinesterase, a critical component of the chain by which messages are passed from one nerve...

Diazinon (O,O-diethyl-O-(2-isopropyl-6-methyl-pyrimidine-4-yl)phosphorothioate), a colorless to dark brown liquid, is a thiophosphoric acid ester developed in 1952 by Ciba-Geigy, a Swiss chemical company (later Novartis and then Syngenta). It is a...