Synonyms: Cuprate(6-),[m-[[3,3'-[iminobis[(1-hydroxy-3-sulfo-6,2-naphthalenediyl)azo(5-hydroxy-2-methyl-4,1-phenylene)azo]]bis[1,5-naphthalenedisulfonato]](10-)]]di-,hexasodium; Cuprate(6-), [m-[[3,3'-[iminobis[[1-(hydroxy-kO)-3-sulfo-6,2-naphthalenediyl](azo-kN1)[5-(hydroxy-kO)-2-methyl-4,1-phenylene]azo]]bis[1,5-naphthalenedisulfonato]](10-)]]di-,hexasodium (9CI); 1,5-Naphthalenedisulfonic acid, 3,3'-[iminobis[(1-hydroxy-3-sulfo-6,2-naphthalenediyl)azo(5-hydroxy-2-methyl-4,1-phenylene)azo]]bis-,copper complex