3-((4-(2-Ethoxy-5-methylphenylazo)-1-naphthyl)azo)benzenesulfonic acid, sodium salt 68959-00-2 Benzenesulfonic acid, 3-((4-((2-ethoxy-5-methylphenyl)azo)-1-naphthalenyl)azo)-, sodium salt Benzenesulfonic acid, 3-((4-((2-ethoxy-5-methylphenyl)azo)-1-naphthyl)azo)-, sodium salt EINECS 273-386-3 Sodium 3-((4-((2-ethoxy-5-methylphenyl)azo)-1-naphthyl)azo)benzenesulphonate