Synonyms: Cuprate(3-),[m-[3-[[3,3'-di(hydroxy-kO)-4'-[[1-(hydroxy-kO)-4-sulfo-2-naphthalenyl]azo-kN1][1,1'-biphenyl]-4-yl]azo-kN1]-4-(hydroxy-kO)-5-hydroxy-2,7-naphthalenedisulfonato(7-)]]di-,trisodium (9CI); Cuprate(3-), [m-[3-[[3,3'-dihydroxy-4'-[(1-hydroxy-4-sulfo-2-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-4,5-dihydroxy-2,7-naphthalenedisulfonato(7-)]]di-,trisodium; 2,7-Naphthalenedisulfonic acid,3-[[3,3'-dihydroxy-4'-[(1-hydroxy-4-sulfo-2-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-4,5-dihydroxy-,copper complex