2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((2-methyl-5-nitrophenyl)azo)-6-(phenylazo)-, disodium salt 5850-41-9 Disodium 4-amino-5-hydroxy-3-((2-methyl-5-nitrophenyl)azo)-6-(phenylazo)naphthalene-2,7-disulphonate EINECS 227-453-9