SPECIFICATION:Molecular formula: NaNO3 Molecular weight: 84.99 Specific gravity: 2.257 Melting point: 308 Appearance: White (French grey or light yellow)crystal Packaging: Woven bags with vinyon outside,vinyon film moistureproof bags inside. NW:25kg/bag.NaNO3 content % min 99.5Moisture content % max1.5 Chlorid (base on CI) content % max0.15 NaNO2 content % max 0.01