硝酸钾 Potassium nitrate
（重定向自Salt Peter）
硝酸钾是钾的硝酸盐，实验式KNO3(硝酸钾是离子化合物，并没有分子，所以没有分子量，只有式量)。外观为透明无色或白色粉末，无味，比重（水=1）为2.11。在水中的溶解度为13 g/100mL（因温度而异，温度越高溶解度越高，在化学物质之中，硝酸钾溶解度变化是相当明显的）。
潮解性较硝酸钠为低，有冷却刺激盐味。溶于水，稍溶于乙醇。
Salt Peter
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英语百科
Potassium nitrate 硝酸钾
（重定向自Salt Peter）
Potassium nitrate is a chemical compound with the chemical formula KNO3. It is an ionic salt of potassium ions K and nitrate ions NO3.
It occurs as a mineral niter and is a natural solid source of nitrogen. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter or saltpetre.
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