Formula:Ca(NO3)2.4H2O Specs: Assay:99.0%min PH Value:5-7 Heavy Metal:0.001%max Water insoluble:0.01%max Sulphates:0.02%max Iron:0.003%max Chloride:0.005%max CaO:23.4%min Nitrogen:11.7%min Properties and applications: Calcium Nitrate is colorless transparene crystal, It is soluble in water and alcohol. It is easily deliquesce in the air. It can be used in agriculture as quick fertilizer, and firework electronic tubes etc.