| Assay: | 99.0-103.0% Ca(NO3)2 · 4H2O |
| pH of a 5% solution | 5.0-7.0 at 25 °C |
| MAXIMUM ALLOWABLE | |
| Insoluble matter: | 0.005% |
| Chloride (Cl): | 0.005% |
| Nitrite (NO2): | 0.001% |
| Sulfate (SO4): | 0.002% |
| Barium (Ba): | 0.005% |
| Heavy metals (as Pb): | 5 ppm |
| Iron (Fe): | 5 ppm |
| Magnesium (Mg): | 0.05% |
| Potassium (K): | 0.005% |
| Sodium (Na): | 0.01% |
| Strontium (Sr): | 0.05% |