1, 6-Naphthalenedisulfonic acid, {7-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthalenyl)azo]-3,} {3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-8-hydroxy-,} trisodium salt 1,6-Naphthalenedisulfonic acid, 7-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthyl)azo]-3, 3'-dimethyl-4-biphenylyl]azo]-8-hydroxy- 1,6-Naphthalenedisulfonic acid, {7-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthyl)azo]-3,} 3'-dimethyl-4-biphenylyl\]azo\]-8-hydroxy-, trisodium salt 6420-13-9 (TRISODIUM SALT) 7-((4'-((8-Amino-1-hydroxy-5-sulfo-2-naphthyl)diazenyl)-3,3'-dimethyl[1,1'-biphenyl]-4-yl)diazenyl)-8-hydroxy-1,6-naphthalenedisulfonic acid AIDS-155992 AIDS155992 C.I. 23740 (*Trisodium salt*) Columbia Blue G Columbia Blue G (*trisodium salt*) NSC75780 (TRISODIUM SALT) Pontamine Blue CLG Pontamine Blue CLG (*trisodium salt*)