Synonyms: 1,6-Naphthalenedisulfonicacid,7-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthalenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-8-hydroxy-,trisodium salt (9CI); 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 (8CI); C.I. 23740; Columbia Blue G; NSC 75780