Also Called: salts of 4,4'-bi-o-toluidine; salts of 3,3'-dimethylbenzidine; salts of o-tolidine; 4,4'-bi-o-Toluidine, salts of [3,3'-Dimethyl[1,1'-biphenyl]-4,4'-diyl]diammonium bis(hydrogen sulphate); o-Tolidine, salts of](Note: see also CAS No 612-82-8 & 74753-18-7);4,4'-bi-o-toluidine, salts of;3,3'-dimethylbenzidine, salts of;o-tolidine, salts of;o-tolidine hydrogen sulphate;salts of 4,4'-bi-<i>o</i>-toluidine salts of 3,3'-dimethylbenzidine salts of <i>o</i>-tolidine;Salts of 3,3′-dimethylbenzidine;[3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl]diammonium bis(hydrogen sulphate);(3,3'-Dimethyl(1,1'-biphenyl)-4,4'-diyl)diammonium bis(hydrogen sulphate);[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-, sulfate (1:2)