4-06-00-00874 (Beilstein Handbook Reference) 5857-62-5 BRN 1978521 O,O-Diethyl O-(4-chlorophenyl) phosphorothioate O-(4-Chlorophenyl) O,O-diethyl phosphorothioate Phosphorothioic acid, O-(4-chlorophenyl) O,O-diethyl ester