4, 6-dihydroxypyrimidine (DHP), whose tautomer is called 1-H-pyrimidine-4, 6-dione. 4, 6-dihydroxypyrimidine is usually used as fine chemical raw materials or organic synthesis intermediates, widely used in the preparation of medicine, pesticides and Chemicalbook bactericides, such as in the pharmaceutical industry can be used to produce sulfonamides sulfonmotosin, vitamin B4, anti-tumor drugs and adjuvant drugs intermediates; In addition, it can also be used to synthesize intermediates of methoxyacrylate fungicides and so on.