2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[2-[4-[(4-sulfophenyl)azo]phenyl]diazenyl]-, compd.

2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-4-(4-sulfophenyl)azophenylazo-, compd. with 2,2,2-nitrilotrisethanol (1:2); 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, compd. with 2,2',2''-nitrilotris[ethanol]; 7-Amino-4-hydroxy-3-[4-[4-(sulfophenyl)azo]phenylazo]-2-naphthalenesulfonic acid, di[tris(2-hydroxyethyl)ammonium salt;7-amino-4-hydroxy-3-[[4-[(4-sulphophenyl)azo]phenyl]azo]naphthalene-2-sulphonic acid, compound with 2,2',2''-nitrilotriethanol (1:2)