乙酸钾是乙酸的钾盐，化学式为CH₃COOK。储存时需要避免的条件有：潮湿、加热、火源、自燃物体及强氧化剂。

乙酸钾可由氢氧化钾或碳酸钾与乙酸发生酸碱中和反应制备：

乙酸钾的应用有：

Potassium acetate (KCH₃COO) is the potassium salt of acetic acid.

It can be prepared by treating a potassium-containing base such as potassium hydroxide or potassium carbonate with acetic acid:

This sort of reaction is known as an acid-base neutralization reaction. Sesquihydrate in water solution (CH₃COOK·1½H₂O) begins to form semihydrate at 41.3 °C. Potassium acetate is the salt that forms along with water as acetic acid and potassium hydroxide are neutralized together.