2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((2-phenoxyphenyl)azo)-, disodium salt 4-Amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((2-phenoxyphenyl)azo)-2,7-naphthalenedisulfonic acid, disodium salt 5850-38-4 Disodium 4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-((2-phenoxyphenyl)azo)naphthalene-2,7-disulphonate EINECS 227-451-8