CAS: 10196-18-6 Molecular Formula: Zn(NO3)2 · 6H2O Molecular Weight: 297.49 g/mol Synonym(s): N/A Test Specification Description Colorless to white crystals Identification Pass test Acidity 0.03% max. Chloride (Cl) 0.005% max. Insoluble Matter 0.005% max. Iron (Fe) 0.001% max. Lead (Pb) 0.005% max. Phosphate (PO4) 0.001% max. Sulfate (SO4) 0.01% max. Calcium (Ca) 0.06% max. Magnesium (Mg) 0.01% max. Potassium (K) 0.02% max. Sodium (Na) 0.05% max. Assay 99.0% min. pH of a 5% Solution @ 25 Deg. C 5 - 7 Copper (Cu) 0.0005% max.