62570-47-2 Benzenesulfonic acid, 4-((4-amino-2-methylphenyl)azo)-, monosodium salt Benzenesulfonic acid, 4-((4-amino-2-methylphenyl)azo)-, sodium salt EINECS 263-605-0 Sodium p-((4-amino-o-tolyl)azo)benzenesulphonate