What is the decomposition temperature of potassium nitrate?

The decomposition temperature of potassium nitrate varies depending on different conditions:

About 400 ℃: begins to decompose into potassium nitrite and oxygen.

334 ℃ (melting point): decomposes into potassium nitrite and oxygen.

Above 550 ℃: Experimental verification requires this temperature to successfully decompose.

670 ℃: further decomposed into potassium oxide, nitric oxide, and oxygen.

The differences in data from different sources may be related to experimental methods or purity. In practical applications, it is recommended to use higher temperatures (such as above 550 ℃).