1,5-Naphthalenedisulfonic acid, 3-((4-((6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-5-methoxy-2-methylphenyl)azo)-, trisodium salt 64346-35-6 EINECS 264-797-9 Trisodium 3-((4-((6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-5-methoxy-o-tolyl)azo)naphthalene-1,5-disulphonate