3-((4-((2-Hydroxy-5-methylphenyl)azo)-1-naphthyl)azo)benzenesulfonic acid, sodium salt 67875-21-2 Benzenesulfonic acid, 3-((4-((2-hydroxy-4-methylphenyl)azo)-1-naphthyl)azo)-, monosodium salt Benzenesulfonic acid, 3-((4-((2-hydroxy-5-methylphenyl)azo)-1-naphthalenyl)azo)-, monosodium salt Benzenesulfonic acid, 3-((4-((2-hydroxy-5-methylphenyl)azo)-1-naphthalenyl)azo)-, sodium salt EINECS 267-536-7 Sodium 3-((4-((2-hydroxy-5-methylphenyl)azo)-1-naphthyl)azo)benzenesulphonate