Synonyms: trisodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(3-sulphonatophenyl)azo]naphthalene-2,7-disulphonate;4-Amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(3-sodiosulfophenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt;2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((3-sulfophenyl)azo)-, trisodium salt;2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-(2-(4-nitrophenyl)diazenyl)-6-(2-(3-sulfophenyl)diazenyl)-, sodium salt (1:3);Einecs 267-087-7;Trisodium 4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((3-sulphonatophenyl)azo)naphthalene-2,7-disulphonate