2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, disodium salt 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[p-[(p-sulfophenyl)azo]phenyl]azo]-, disodium salt 6300-50-1 7-Amino-4-hydroxy-3-[4-[4-(sulfophenyl)azo]phenylazo]-2-naphthalenesulfonic acid, disodium salt NSC45594