Synonyms: Cuprate(3-), (4-amino-6-(2-(5-(((2,3-dichloro-6-quinoxalinyl)carbonyl)amino)-2-hydroxy-4-sulfophenyl)diazenyl)-5-hydroxy-1,3-naphthalenedisulfonato(5-))-, potassium sodium;1-Amino-8-hydroxy-7-((5-(((2,3-dichloroquinoxalyl-6)carbonyl)amino)-2-hydroxy-4-sulfophenyl)azo)-2,4-naphthalenedisulfonic acid, copper complex (1:1), potassium, sodium salt;Cuprate(3-), (4-amino-6-((5-(((2,3-dichloro-6-quinoxalinyl)carbonyl)amino)-2-hydroxy-4-sulfophenyl)azo)-5-hydroxy-1,3-naphthalenedisulfonato(5-))-, potassium sodium