Trisodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate

2,7-Naphthalenedisulfonic acid,4-amino-5-hydroxy-3-(2-(4-nitrophenyl)diazenyl)-6-(2-(4-sulfophenyl)diazenyl)-,sodium salt (1:3), trisodium,(6E)-4-amino-3-[(4-nitrophenyl)diazenyl]-5-oxo-6-[(4-sulfonatophenyl)hydrazinylidene]naphthalene-2,7-disulfonate, Trisodium 4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((4-sulphonatophenyl)azo)naphthalene-2,7-disulphonate, EINECS 227-450-2, 2,7-Naphthalenedisulfonic acid,4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((4-sulfophenyl)azo)-,trisodium salt,