An organophosphate insecticide; inhibits insect cholinesterase; reduces cattle lice (L. vituli, D. bovis, and H. eurysternus) infestation by 99.1% at 3.5 mg/kg; selectively toxic to lice over cattle, only inhibiting cattle plasma acetylcholinesterase activity by 20% with no effect on survival at 24 mg/kg; increases SCE and induces cell cycle arrest at the M1 phase in V79 cells at 40 μg/ml; increases liver enzyme activity, inhibits cholinesterase, and induces chronic liver inflammation in male beagle dogs from 1.4-4.7 mg/kg; induces loss of striation and myocytolysis of cardiomyocytes and reduces serum cholinesterase activity in rats 5 mg/kg ,