60238-56-4 CHLORTHIOPHOS CM-S 2957 Chlorthiophos [ANSI:ISO] Chlorthiophos [ANSI] O,O-Diethyl O-(dichloro(methylthio)phenyl) phosphorothioate O,O-Diethyl O-dichloro(methylthio)phenyl thiophosphate Phosphorothioic acid, O-(dichloro(methylthio)phenyl) O,O-diethyl ester Phosphorothioic acid, O-(dichloro(methylthio)phenyl) O,O-diethyl ester (9CI)