Synonyms: Benzidine,N,N,N',N'-tetramethyl- (6CI,8CI); [1,1'-Biphenyl]-4,4'-diamine,N,N,N',N'-tetramethyl- (9CI); 4,4'-Bis(N,N-dimethylamino)biphenyl;4,4'-Bis(dimethylamino)-1,1'-biphenyl; 4,4'-Bis(dimethylamino)biphenyl;N,N,N',N'-Tetramethyl-p,p'-benzidine;N,N,N',N'-Tetramethyl[1,1'-biphenyl]-4,4'-diamine;N,N,N',N'-Tetramethylbenzidine; N,N-Dimethyl-(4'-(dimethylamino)biphenyl-4-yl)amine;NSC 433; TMB