Place of Origin : Hengshui,China  
                                                         
Properties:Slightly foul odour and bitter taste,nonpoisonous.Specific gravity:1.42-1.52        Easily soluble in ethyl acetone,dilute solution of sodium hydroxide and sodium carbonate,solubel in ethyl alcohol,not easily soluble in benzene,insoluble in water and gasoline.
Application:The prod