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硝酸鈉

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硝酸鈉

硝酸鈉

  硝酸鈉,熔點為306.8℃,密度為2.257克/立方厘米(20℃時),為無色透明或白微帶黃色菱形晶體。其味苦咸,易溶于水和液氨,微溶于甘油和乙醇中,易潮解,特別在含有極少量氯化鈉雜質時,硝酸鈉潮解性就大為增加。當溶解于水時其溶液溫度降低,溶液呈中性。在加熱時,硝酸鈉易分解成亞硝酸鈉和氧氣。硝酸鈉可助燃,須存儲在陰涼通風的地方。有氧化性,與有機物摩擦或撞擊能引起燃燒或爆炸。有毒。
  搪瓷工業用作助熔劑、氧化劑和用于配制琺瑯粉的原料。玻璃工業用作各種玻璃及制品的脫色劑、消泡劑、澄清劑及氧化助熔劑。無機工業用作熔融燒堿的脫色劑和用于制造其他硝酸鹽類。食品工業用作肉類加工的發色劑,可防止肉類變質,并能起調味作用?;使I用作適用酸性土壤的速效肥料,特別適用決根作物,如甜菜、蘿卜等。染料工業用作生產苦味酸和染料的原料。冶金工業用作煉鋼、鋁合金的熱處理劑。機城工業用作金屬清洗劑和配制黑色金屬發藍劑。醫藥工業用作青霉素的培養基。卷煙工業用作煙草的助燃劑。分析化學中用作化學試劑。此外,也用于生產炸藥等。
  化學純的硝酸鈉用于鍍鋅層的低鉻酸鈍化和鎂合金的氧化溶液中
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