Also Called: 2-Naphthalenesulfonic acid, 3-[[4-(acetylamino)phenyl] azo]-4-hydroxy-7-[[[[5-hydroxy-6-(phenylazo)-7-sulfo -2-naphthalenyl]amino]carbonyl]amino]-, disodium salt;2-Naphthalenesulfonic acid, 3-[2-[4-(acetylamino)phenyl]diazenyl]-4-hydroxy-7-[[[[5-hydroxy-6-(2-phenyldiazenyl)-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-, sodium salt (1:2);2-Naphthalenesulfonic acid, 3-[[4-(acetylamino)phenyl]azo]-4-hydroxy-7-[[[[5-hydroxy-6-(phenylazo)-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-, disodium salt;3-[(4-(Acetylamino)phenyl)azo]-4-hydroxy-7-[[[[5-hydroxy-6-(phenylazo)-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-2-naphthalenesulfonic acid, disodium salt