Synonyms: Cuprate(4-),[4-amino-5-hydroxy-6-[[5-(hydroxy-kO)-6-[[2-(hydroxy-kO)-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo-kN1]-7-sulfo-2-naphthalenyl]azo]-1,3-naphthalenedisulfonato(6-)]-,tetrahydrogen (9CI); Cuprate(4-),[4-amino-5-hydroxy-6-[[5-hydroxy-6-[[2-hydroxy-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-7-sulfo-2-naphthalenyl]azo]-1,3-naphthalenedisulfonato(6-)]-,tetrahydrogen; 1,3-Naphthalenedisulfonic acid,4-amino-5-hydroxy-6-[[5-hydroxy-6-[[2-hydroxy-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-7-sulfo-2-naphthalenyl]azo]-,copper complex