.beta.-Sulfoanthraquinone 2-Anthracenesulfonic acid, 9,10-dihydro-9,10-dioxo- 2-Anthraquinonesulfonic acid 2-Sulfoanthraquinone 84-48-0 9,10-Anthraquinone-2-sulfonate 9,10-Anthraquinone-2-sulfonic acid 9,10-Dihydro-9,10-dioxo-2-anthracenesulfonic acid Anthraquinone 2-sulfonate Anthraquinone-2-sulfonate Anthraquinone-2-sulfonic acid NSC229389