性质：又称硝石。无色斜方结晶或白色结晶粉末。密度2.109g/cm3。熔点334℃。易溶于水。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            。在400℃时分解放出氧，并转变成亚硝酸钾。为强氧化剂。与有机物接触能引起燃烧和爆炸。由硝酸钠加适量水加热溶解，加入氯化钾进行复分解反应，经蒸发浓缩，先析出氯化钠结晶，过滤，滤液经冷却结晶，过滤，水洗，固液分离，干燥制得。有低温萃取法及高温法。用于制造黑色火药，焰火，机械热处理淬火的盐浴，釉药，卷烟纸，青霉素钾和利福平等。还可用作玻璃澄清剂，农作物和花卉的复合肥料和选矿剂。

用途：机械热淬的盐浴；陶瓷工业用于制造 彩釉；用作玻璃澄清剂，制造汽车灯玻璃、光学玻璃和显像管玻壳等。生产青霉素钾盐、利福平等医药。还用作选矿药剂。食用硝酸钾用作肉制品的发色剂、防腐剂。农业用作肥料。
包装：外套编织袋、复合纸袋。内衬塑料袋，净重50公斤