Synonyms: EINECS 266-270-9;1-((2,5-Dimethoxy-4-((3-(acetylamino)phenyl)azo)phenyl)azo)-2-amino-8-hydroxynaphthalene-6-sulfonic acid, sodium salt;2-Naphthalenesulfonic acid, 5-((4-((3-(acetylamino)phenyl)azo)-2,5-dimethoxyphenyl)azo)-6-amino-4-hydroxy-, monosodium salt;2-Naphthalenesulfonic acid, 5-(2-(4-(2-(3-(acetylamino)phenyl)diazenyl)-2,5-dimethoxyphenyl)diazenyl)-6-amino-4-hydroxy-, sodium salt (1:1);66236-90-6;71545-72-7;72230-94-5;Sodium 5-((4-((3-acetamidophenyl)azo)-2,5-dimethoxyphenyl)azo)-6-amino-4-hydroxynaphthalene-2-sulphonate