2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-((4-((phenylamino)sulfonyl)phenyl)azo)-, monosodium salt 6-Amino-4-hydroxy-5-((4-(phenylaminosulfonyl)phenyl)azo)-2-naphthalenesulfonic acid, sodium salt 69029-99-8 EINECS 273-839-5 Sodium 6-amino-5-((4-anilinosulphonylphenyl)azo)-4-hydroxynaphthalene-2-sulphonate