2,4-Diamino-5-methylbenzenesulfonic acid 2,4-Diaminotoluene-5-sulfonic acid 2,4-Tolylenediamine-5-sulfonic acid 5-Methyl-2,4-diaminobenzenesulfonic acid 88-52-8 Benzenesulfonic acid, 2,4-diamino-5-methyl- NSC8621 m-Toluenesulfonic acid, 4,6-diamino-