Synonyms: Cuprate(4-),[4-amino-5-(hydroxy-kO)-6-[[2-(hydroxy-kO)-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo-kN1]-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-2,7-naphthalenedisulfonato(6-)]-,tetrahydrogen (9CI); Cuprate(4-),[4-amino-5-hydroxy-6-[[2-hydroxy-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-2,7-naphthalenedisulfonato(6-)]-,tetrahydrogen; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-[[2-hydroxy-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-,copper complex