EINECS 248-042-0, Benzenesulfonic acid,3-(2-(4-(2-(4-hydroxyphenyl)diazenyl)-5-methoxy-2-methylphenyl)diazenyl)-4-methoxy-,sodium salt (1:1), Sodium 3-((4-((4-hydroxyphenyl)azo)-5-methoxy-o-tolyl)azo)-4-methoxybenzenesulphonate, Benzenesulfonic acid,3-((4-((4-hydroxyphenyl)azo)-5-methoxy-2-methylphenyl)azo)-4-methoxy-,monosodium salt,