亚硝酸钾 forms 硝酸钾when heated in the presence of oxygen from 550° to 790°.
The rate of reaction increases with temperature, but the extent of reaction decreases.
此外,亚硝酸钾加热至350 °C以上时分解生成氧化钾并放出氧化氮气体.而遇酸时,则放出剧毒的氧化氮气体.