1. From the perspective of chemical reaction and production cost, the preparation process of potassium hydroxide is relatively complex, which requires high energy and equipment investment.

2. Therefore, its cost is usually higher than that of potassium oxide and potassium carbonate.

3. At the same time, potassium hydroxide has strong alkalinity and wide application range, so in some cases, its price may be higher than that of potassium oxide and potassium carbonate.