2-Naphthalenesulfonic acid, 3-[(2,4-dimethylphenyl)azo]-4-hydroxy-7-[[[[5-hydroxy-7-sulfo-6-[(6-sulfo-2-naphthalenyl)azo]-2-naphthalenyl]amino]carbonyl]amino]-, trisodium salt 4-Hydroxy-7-[[[[5-hydroxy-6-[(2,4-dimethylphenyl)azo]-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-3-[(6-sulfo-2-naphthalenyl)azo]-2-naphthalenesulfonic acid, trisodium salt 67923-64-2 NSC65575