7-Amino-4-hydroxy-3-[p-(p-sulfophenylazo)phenylazo]-2-naphthalenesulfonic acid disodium salt

disodium 7-amino-4-hydroxy-3-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate

7-Amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid disodium salt

3-[4-[4-(Sodiosulfo)phenylazo]phenylazo]-4-hydroxy-7-aminonaphthalene-2-sulfonic acid sodium salt

2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[ (4-sulfophenyl)azo]phenyl]azo]-, disodium salt