性質：又稱硝石。無色斜方結晶或白色結晶粉末。密度2.109g/cm3。熔點334℃。易溶于水。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            。在400℃時分解放出氧，并轉變成亞硝酸鉀。為強氧化劑。與有機物接觸能引起燃燒和爆炸。由硝酸鈉加適量水加熱溶解，加入氯化鉀進行復分解反應，經蒸發濃縮，先析出氯化鈉結晶，過濾，濾液經冷卻結晶，過濾，水洗，固液分離，干燥制得。有低溫萃取法及高溫法。用于制造黑色火藥，焰火，機械熱處理淬火的鹽浴，釉藥，卷煙紙，青霉素鉀和利福平等。還可用作玻璃澄清劑，農作物和花卉的復合肥料和選礦劑。

用途：機械熱淬的鹽浴；陶瓷工業用于制造 彩釉；用作玻璃澄清劑，制造汽車燈玻璃、光學玻璃和顯像管玻殼等。生產青霉素鉀鹽、利福平等醫藥。還用作選礦藥劑。食用硝酸鉀用作肉制品的發色劑、防腐劑。農業用作肥料。
包裝：外套編織袋、復合紙袋。內襯塑料袋，凈重50公斤