it is easily deliquescent in the air. it can be used in agriculture as quick fertilizer and firework electronic tube etc. CERTIFICATE OF ANALYSIS FOR CALCIUM NITRATE 99.0%MIN Technical SpecificationStandardTest ResultAssay99.0%min 99.10%PH Value5-75.7Water Insolubles0.01%max0.008%Heavy Metal0.001%max0.0007%Chloride0.005%max0.0045%Iron0.003%max0.0026%Sulphates0.03%max0.027%Calcium Oxide 23.4%min 23.41%Nitrogen 11.76%min 11.77%