The chemical formula of potassium hydroxide is Koh, which is a strong base. Like other chemicals, it has a "shelf life" and its "shelf life" is short. This statement comes from its chemical properties because it can absorb water and carbon dioxide in the air to produce potassium carbonate. Therefore, once it is stored improperly, if it is not sealed for storage, it is easy to deteriorate. After deterioration, the alkalinity is weakened, and its composition has changed, the original chemical reaction will also change. Therefore, the original function can not be brought into play.

那過期氫氧化鉀處理方式是怎樣的呢？是直接棄之不顧，跟我們的生活垃圾一樣嗎？答案是否定的。實際上，過期處理方式主要是回收。因為盡管過期了，它變質的產物是碳酸鉀，這也是種基礎化學品，也是可以有其他用途的。回收過期的不僅可以保護環境、節約能源、帶動社會效益的穩定持續發展，還可以使企業公司的效益提高，節約成本。

What is the treatment of expired potassium hydroxide? Is it the same as our domestic garbage? The answer is No. In fact, the main method of expiration treatment is recycling. Although it has expired, the product of its deterioration is potassium carbonate, which is also a basic chemical and can be used for other purposes. Recycling expired can not only protect the environment, save energy and drive the stable and sustainable development of social benefits, but also improve the benefits of enterprises and companies and save costs.

但是經營過期回收的公司需要回收資質和證件，因為氫氧化鉀具有毒性跟腐蝕性，屬于管制品之一。想從事回收行業也須取得相關的允許，無證的公司是不允許進行回收的，另外，回收受許多因素的影響，所以回收的并不固定。

However, companies operating expired recycling need recycling qualifications and certificates, because potassium hydroxide is toxic and corrosive and belongs to one of the national managed products. If you want to engage in the recycling industry, you must also obtain relevant permission. Undocumented companies are not allowed to recycle. In addition, the recycling price is affected by many factors, so the recycling price is not fixed.