... 3;M.f.: C10H15O3PS2;Form: Colourless, oily liquid; (tech., brown, oily liquid, with a mercaptan-like odour). M ... 7), 151 d (pH 9). F.p.: 170C (tech.) APPLICATIONSBiochemistry: Cholinesterase inhibitor.Mode of action: Insecticide with contact ... mg/kg b.w.Toxicity class: WHO (a.i.) II; EPA (formulation) IIEC hazard: R40| T; R23, ... by the analogous phenol compounds. Fenthion tech 95%/ Fenthion 640 G/L ULV