9,10-Dioxo-9,10-dihydroanthracene-2,7-disulfonic acid?under pressure and Potassium chlorate heating, and at the same time will be generated 2, 7 – dihydroxyanthraquinone separation open, will product ?1,2,7-Trihydroxyanthracene-9,10-dione?sulfonation, and translated into Sodium salt.
