3626-35-5 Benzenesulfonic acid, 4-((4-amino-5-methoxy-2-methylphenyl)azo)-, Benzenesulfonic acid, 4-((4-amino-5-methoxy-2-methylphenyl)azo)-, monosodium salt Benzenesulfonic acid, 4-((4-amino-5-methoxy-2-methylphenyl)azo)-, sodium salt EINECS 222-837-2 NSC 45525 Sodium p-((4-amino-5-methoxy-o-tolyl)azo)benzenesulphonate