3,3'-dichloro-4,4'-biphenyldiamine; 3,3'-dichloro-4,4'-diaminobiphenyl; 3,3'-dichloro-4,4'-diamino(1,1'-biphenyl); 3,3'-dichlorobenzidine; 3,3'-dichlorodiphenyl-4,4'-diamine; 3,3'-dichlorodiphenyl-4,4'-ylenediamine; 4,4'-diamino-3,3'-dichlorobiphenyl; 4,4'-diamino-3,3'-dichlorodiphenyl; 4,4'-diamino-3,3'-diclorobifenile; 4,4'-diamino-3,3'-diclorodifenile; Benzidine3,3'-dichloro; Curithane c126; C.i. 23060; Dcb; Dichlorobenzidine; Dichlorobenzidine base; O,o'-dichlorobenzidine; Rcra waste number u073; (1,1'-biphenyl)-4,4'-diamine,3,3'-dichloro.