SEARCH Articles Figures Tables 1.4- Dihydroxy-9,10-anthraquinone-2-sulfonic Anthraquinone Anthraquinone sulfonation Anthraquinone sulfonation Anthraquinone sulfonic acid complexes Anthraquinone-1-sulfonic acid Anthraquinone-1-sulfonic acid, derivative Anthraquinone-2-sulfonic acid chloride Anthraquinones Polypyrrole/anthraquinone-2-sulfonate Potassium Anthraquinone--sulfonate Potassium anthraquinone-a-sulfonate Sodium anthraquinone-2-sulfonate Sulfonation of anthraquinone