Colorless transparent monoclinic crystal or white powder.The relative density is 1.619. It is soluble in water, but insoluble in alcohol, acetone, ammonia. It will decompose when the temperature was to 155 degree centigrade. Food/technical grade:(nh4)2hpo4%=98.0, p2o5%=53.0, n%=20.8, ph=7.8--8.5, f%=0.001, water insoluble%=0.1, moisture%=0.2