4-((4-Amino-5-methoxy-2-methylphenyl)azo)benzenesulfonic acid, hydrochloride salt 4-((4-Amino-5-methoxy-o-tolyl)azo)benzenesulphonic acid monohydrochloride 68400-35-1 Benzenesulfonic acid, 4-((4-amino-5-methoxy-2-methylphenyl)azo)-, monohydrochloride EINECS 270-024-6