Sodium nitrate, melting point is 306.8℃, density is 2.257 g/cm3 (at 20℃), is colorless transparent or white microstrip yellow diamond crystal. Its taste is bitter and salty, soluble in water and liquid ammonia, slightly soluble in glycerin and ethanol, easy to deliquescence, especially in the very small amount of sodium chloride impurities, the deliquescence of sodium nitrate is greatly increased. When dissolved in water, the temperature of the solution decreases and the solution becomes neutral. When heated, sodium nitrate is easily decomposed into sodium nitrite and oxygen. Sodium nitrate can be combustion, must be stored in a cool and ventilated place. Oxidation, friction or impact with organic matter can cause combustion or explosion. Have irritant, toxicity is very small, but have harm to human body!
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