Molecular formula:(BiO)2CO3?/2H2O Molecular weight:518.976 Description:Bismuth subcarbonate is the white powder,no smell or taste.Its relative density is 6.86,decomposes carbon dioxide and bismuth oxide at the temperature 308癈.Gradually decomposes and degenerate under the light.Undisssolved in water or ethanol,easily dissolves in inorganic acid(nitric acid,hydrochloric acid),acetic acid and ammonium chloride solution,slightly dissolves in alkali metal carbonate solution. Usage:As astringent and X-ray diagnosis opacifier in medical industry,also can treat the gastric and duodenal ulcer,bacteria red dysentery,amoebic dysentery,acute mucosa permeable gastritis,eneritis,diarrhea,skin disease,eczema and crystal rash as well external remedy of fire wound. Quality standard:USP/CP