Sodium nitrate, melting point of 306.8 ℃, the density of 2.257 g/cubic centimeters (20 ℃), for colorless transparent or white microstrip yellow diamond crystals. The bitter in taste salty, easily soluble in water and liquid ammonia, slightly soluble in glycerin and ethanol, easy to ChaoXie, especially in very small amounts impurity containing sodium chloride, sodium nitrate ChaoXie sex is greatly increased. When heated, sodium nitrate easily into down into the sodium nitrate and oxygen. Sodium nitrate can combustion, must be stored in a cool, well-ventilated places.