2,5-Dichloroaniline-4-sulfonic acid 2,5-Dichlorosulfanilic acid 4-Amino-2,5-dichlorobenzenesulfonic acid 4-Amino-2,5-dichlorobenzenesulphonic acid 88-50-6 Benzenesulfonic acid, 4-amino-2,5-dichloro- EINECS 201-836-0 NSC 1128 Sulfanilic acid, 2,5-dichloro- (8CI)