white or light grey crystal. It is hydroscopic, and apt to dissolve in water(not in alcohol or acetone), and it will become solid blocks when absorbing moisture. The aqueous solution is alkalinous. It reacts with alkali to release ammonia gas. Applications: Used for chemical fertilizers and for production of complex fertilizers, potassium sulphate, ammonium chloride and ammonium persulpate, ect. Also can be used for food processing, textile industry, medical industry and leather processing. N ≥ 21% Water content(H2O),%≤1.0