It is irritating and smothering colorless, relative density 2.264(0℃).m.p. -72.7℃, b.p. -10℃.vapor tension 338.32kPa, at 338.32kPa, its water solubility is 8.5%(25℃).Easily soluble in methanol and ethanol; soluble in sulfuric acid, acetic acid and ether etc. Wet product is corrosive to metals; no mixture with the following substances: Lithium nitrate, potassium chlorate, metals etc.