9,10-Dioxo-9,10-dihydroanthracene-2,7-disulfonic acidunder 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-dionesulfonation, and translated into Sodium salt.
