2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthalenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxy-, trisodium salt 2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthyl)azo]-3,3'-dimethyl-4-biphenylyl]azo]-4-hydroxy-, trisodium salt 6420-25-3 Benzo Cyanine B C.I. 23835 NSC51537