Synonyms: 2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-6-(2-(2-methoxyphenyl)diazenyl)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-(2-(2-methoxy-5-sulfophenyl)diazenyl)-, sodium salt (1:3);4-Hydroxy-7-((((5-hydroxy-6-((2-methoxyphenyl)azo)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-((2-methoxy-5-sulfophenyl)azo)-2-naphthalenesulfonic acid, trisodium salt;2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-6-((2-methoxyphenyl)azo)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-((2-methoxy-5-sulfophenyl)azo)-, trisodium salt;Trisodium 4-hydroxy-7-((((5-hydroxy-6-((2-methoxyphenyl)azo)-7-sulphonato-2-naphthyl)amino)carbonyl)amino)-3-((2-methoxy-5-sulphonatophenyl)azo)naphthalene-2-sulphonate;trisodium 3-[2-(2-methoxyphenyl)hydrazinylidene]-7-[({(6E)-6-[2-(2-methoxy-5-sulfonatophenyl)hydrazinylidene]-5-oxo-7-sulfonato-5,6-dihydronaphthalen-2-yl}carbamoyl)amino]-4-oxo-3,4-dihydronaphthalene-2-sulfonate