Ammonium Sulfate is a white rhombus crystal with no smell but tastes salty, It can decompose when it is heated to 235 Deg C, and it will be easily dissolved in water. Its proportion is 1.769, and it is a acid reaction when it dissolve in water. It is not dissolved in alcohol or acetone. It can absorb the water and scab in moist air. It can give out ammonia gas when it reactions with alkali.