Sodium Nitrate: Specification: Sodium Nitrate: 99.3%min Moisture: 1.8%max Chloride: 0.24%max Water Insoluble: 0.06%max NaNO2: 0.02%max Na2CO3: 0.1%max CAS No.: 7631-99-4 Molecular Weight: 84.99 Chemical Formula: NaNO3 Hazard Class: 5.1 UN/NA: UN1498 Packing Group: III