21923-23-9 51052-59-6 AI3-27635 BRN 2003497 CELA S-2957 CHLORTHIOPHOS CM S 2957 Caswell No. 310A Celamerck S-2957 Celathion Chlorthiophos I EINECS 244-663-6 ENT 27635 EPA Pesticide Chemical Code 111811 HSDB 6451 NSC 195164 O,O-Diethyl-O-(2,5-dichloro-4-(methylthio)phenyl)thionophosphate combined with O,O-diethyl-O-(4,5-dichloro-2- (methylthio)phenyl)thionophosphate and O,O-diethyl-O- (2,4-dichloro-5-(methylthio)phenyl)thionophosphate O,O-Diethyl-O-2,4,5-dichloro-(methylthio)phenyl thionophosphate O-(2,5-Dichloro-4-(methylthio)phenyl) O,O-diethyl phosphorothioate O-(Dichloro(methylthio)phenyl) O,O-diethyl phosphorothioate (3 isomers) OMS 1342 Phosphorothioic acid, O,O-diethyl O-(2,5-dichloro-4-(methylthio)phenyl) ester Phosphorothioic acid, O-(2,5-dichloro-4-(methylthio)phenyl) O,O-diethyl ester S 2957