Synonyms: Copper,[trihydrogen4-amino-5-hydroxy-3-[[p-[(2-hydroxyethyl)sulfonyl]phenyl]azo]-6-[(2-hydroxy-5-sulfophenyl)azo]-2,7-naphthalenedisulfonato(2-)]-,mono(hydrogen sulfate) (ester) (8CI); Cuprate(4-), [4-amino-5-(hydroxy-kO)-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-[[2-(hydroxy-kO)-5-sulfophenyl]azo-kN1]-2,7-naphthalenedisulfonato(6-)]-,tetrahydrogen (9CI); Cuprate(4-),[4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-[(2-hydroxy-5-sulfophenyl)azo]-2,7-naphthalenedisulfonato(6-)]-,tetrahydrogen; 2,7-Naphthalenedisulfonic acid,4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-[(2-hydroxy-5-sulfophenyl)azo]-,copper complex