O-(3-Chloro-4-methyl-2-oxo-2H-1-benzopyran-7-yl) O,O-Diethyl Ester; 3-Chloro-4-methyl-7-coumarinyl Diethyl Phosphorothioate; Asuntol; Baymix; Muscotox; Resitox

Insecticide, nematocide. Coumaphos is useful in cannabis testing kits as a component of pesticide mixes. Coumaphos is an organophosphate pesticide.1 It is converted into an oxon-containing metabolite in vivo, similar to other organophosphate pesticides, that inhibits acetylcholinesterase. It is active against adult, but not arrested stage, O. ostertagi helminths. 2 Coumaphos is toxic to A. stephensi and A. aegypti mosquitoes when applied topically, with median lethal doses of 0.002 and 0.012ug per female mosquito, respectively, but not when used as a contact insecticide.3 It is lethal to rats (LD50s = 41 and 16mg/kg for male and female rats, respectively). 4 Formulations containing coumaphos have been used to control pests in livestock.