2,5-Dichlorobenzenesulfonic acid 2,5-Dichlorobenzenesulphonic acid 62203-25-2 88-42-6 AI3-62789 Benzenesulfonic acid, 2,5-dichloro- Benzenesulfonic acid, 2,5-dichloro-, dihydrate EINECS 201-829-2 NSC 8755