Dimethoate is a widely used organophosphate insecticide and acaricide. ... Dimethoate. Names Other names O,O-dimethyl S-methylcarbamoylmethyl phosphorodithioate Phosphorodithioic acid, O,O-Dimethyl S-(2-(methylamino)-2-oxoethylyl)ester Identifiers CAS Number60-51-5 3D model (JSmol)Interactive image 32 more rows