乙酰甲胺磷（Acephate），学名O,S-二甲基-N-乙酰基硫代磷酰胺。

白色晶体，易溶于水、甲醇、乙醇、丙酮、二氯甲烷、二氯乙烷，微溶于乙醚、苯、甲苯、二甲苯。低毒，半数致死量（大鼠经口）866～945mg/kg。

Acephate is an organophosphate foliar insecticide of moderate persistence with residual systemic activity of about 10–15 days at the recommended use rate. It is used primarily for control of aphids, including resistant species, in vegetables (e.g. potatoes, carrots, greenhouse tomatoes, and lettuce) and in horticulture (e.g. on roses and greenhouse ornamentals). It also controls leaf miners, caterpillars, sawflies and thrips in the previously stated crops as well as turf, and forestry. By direct application to mounds, it is effective in destroying imported fire ants.