Synonyms: 63395-37-9;Cuprate(4-), (7-((2-(hydroxy-kappaO)-5-hydroxy-7-sulfo-1-naphthalenyl)azo-kappaN1)-8-(hydroxy-kappaO)-1,3,5-naphthalenetrisulfonato(6-))-, tetrasodium;Cuprate(4-), (7-(2-(2-(hydroxy-kappaO)-5-hydroxy-7-sulfo-1-naphthalenyl)diazenyl-kappaN1)-8-(hydroxy-kappaO)-1,3,5-naphthalenetrisulfonato(6-))-, sodium (1:4)