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

8-[7-Amino-1-hydroxy-3-(sodiosulfo)-2-naphthalenylazo]-5-[4-phenylazo-7-(sodiosulfo)-1-naphthalenylazo]-2-naphthalenesulfonic acid sodium salt

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