21116-11-0 EINECS 244-219-1 Phenol, 4-((3-methyl-4-((4-(2-(sulfooxy)ethoxy)phenyl)azo)phenyl)azo)-, monosodium salt Sodium 2-(p-((4-((p-hydroxyphenyl)azo)-o-tolyl)azo)phenoxy)ethyl sulphate