2-(4'-Aminophenyl)-6-methylbenzene-thiazole-3',7-disulfonic acid 2-(4-Amino-3-sulphophenyl)-6-methylbenzothiazole-7-sulphonic acid 5855-98-1 7-Benzothiazolesulfonic acid, 2-(4-amino-3-sulfophenyl)-6-methyl- EINECS 227-471-7