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

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

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