Synonyms: m-Toluenesulfonicacid, 4,6-diamino- (6CI,7CI,8CI); 1-Methyl-2,4-diaminobenzene-5-sulfonic acid;2,4-Diamino-5-methylbenzenesulfonic acid; 2,4-Diaminotoluene-5-sulfonic acid;2,4-Tolylenediamine-5-sulfonic acid; 5-Amino-4-sulfo-o-toluidine;5-Methyl-2,4-diaminobenzenesulfonic acid; NSC 8621