trisodium 5-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-8-[[4-(phenylazo)-6-sulphonatonaphthyl]azo]naphthalene-2-sulphonate

2-Naphthalenesulfonic acid, 5-[(7-amino-1-hydroxy-3-sulfo- 2-naphthalenyl)azo]-8-[[4-(phenylazo)-6-sulfo -1-naphthalenyl]azo]-, trisodium salt

5-[(7-Amino-1-hydroxy-3-sodiooxysulfonyl-2-naphthalenyl)azo]-8-[[4-(phenylazo)-6-sodiooxysulfonyl-1-naphthalenyl]azo]-2-naphthalenesulfonic acid sodium salt