purity range from 98% to 99.5% flexible packing:25kg,50kg, T-bag Quality goods with competitive prices timely delivery [Appearance]Odorless, colorless, transparent crystals, white granules or powder, hygroscopic, deliquescent.[Solubility in water]815 g/L[Melting Point]308[Vapor Pressure]0.63 (600 C)[Density]2.26 g/cm3[Usage]Manufacture enamels for pottery, nitric acid, sodium nitrite, in matches, ...