2,7-Naphthalenedisulfonic acid, 4-amino-3-((4-(5-((2,4-diamino-5-methylphenyl)azo)-1H-benzimidazol-2-yl)phenyl)azo)-5-hydroxy-6-(phenylazo)- 4-Amino-3-((4-(5-((2,4-diamino-5-methylphenyl)azo)-1H-benzimidazol-2-yl)phenyl)azo)-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid 68957-65-3