disodium 4-amino-5-hydroxy-3-[[4-[5-[(4-hydroxyphenyl)azo]-1H-benzimidazol-2-yl]phenyl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate

4-Amino-5-hydroxy-3-[[4-[5-[(4-hydroxyphenyl)azo]-1H-benzimidazol-2-yl]phenyl]azo]-6-(phenylazo)-2,7-naphthalenedisulfonic acid disodium salt

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[[4-[ 5-[(4-hydroxyphenyl)azo]-1H-benzimidazol-2-yl]phenyl ]azo]-6-(phenylazo)-, disodium salt