26845-91-0 Benzenesulfonic acid, 3-((4-((4-hydroxyphenyl)azo)-5-methoxy-2-methylphenyl)azo)-4-methoxy-, monosodium salt EINECS 248-042-0 Sodium 3-((4-((4-hydroxyphenyl)azo)-5-methoxy-o-tolyl)azo)-4-methoxybenzenesulphonate