Synonyms: Cuprate(8-),[m-[[3,3'-(carbonyldiimino)bis[7-[(2,8-dihydroxy-3,6-disulfo-1-naphthalenyl)azo]-8-hydroxy-1,5-naphthalenedisulfonato]](12-)]]di-,octasodium; Cuprate(8-), [m-[[3,3'-(carbonyldiimino)bis[8-(hydroxy-kO)-7-[[2-(hydroxy-kO)-8-hydroxy-3,6-disulfo-1-naphthalenyl]azo-kN1]-1,5-naphthalenedisulfonato]](12-)]]di-,octasodium (9CI); 1,5-Naphthalenedisulfonic acid,3,3'-(carbonyldiimino)bis[7-[(2,8-dihydroxy-3,6-disulfo-1-naphthalenyl)azo]-8-hydroxy-,copper complex