Bismuth subnitrate is white superfine powder,not dissolve in water or alcohol,easily dissolve in nitric acid or hydrochloric acid. Bismuth subnitrate is mainly applied in pharmaceutical industry,owns the astringency,can be used as stomach drug to treat the intestines and stomach disease,also can be used for disposing wound and arresting the bleeding;assay sugar and alkaloid in clinic test.Also acted as antiseptics,deodorant and stratographic analysis reagent etc. Quality standard:USP