2-Aminoanthracene-9,10-dione with sulfuric acid and copper powder processing.
Properties and Applications
dark brown. Soluble in 1, 2, 3, 4 – Tetrahydronaphthalene, Xylene. In concentrated sulfuric acid to dark brown, dilution after dark brown precipitation; In the basic insurance powder solution for grey; In the acidic insurance powder solution for dark purple.