1.Ca(NO3)2 4H2O :99% 2.CAS No.: 10124-37-5 3.Insoluble substance in water, 01%max 4.Range of PH value:4.5-6.5 Index NameIndex ValueIndustrial GradeAgriculturalGradePurity, ≥99.099.0Total N, % ≥—11.74CaO, % ≥— 23.5 Insoluble substance in water, % ≤0.100.10Range of PH value4.5-6.54.5-6.5Pb ≤0.0020.002Sulphate ≤0.020.02Fe ≤0.0010.001Cl ≤0.0050.005NH4 ≤0.010.01Cd ≤00 calcium nitrate crystal