The chemical formula of potassium hydroxide is Koh, which is a strong base. Like other chemicals, there is a "shelf life" and it has a shorter "shelf life". This is due to its chemical properties, because it can absorb water and carbon dioxide in the air and produce potassium carbonate. Therefore, once the storage is improper, if it is not sealed for storage, it is easy to deteriorate. After metamorphism, the alkalinity is weakened, and its composition has changed, so the original chemical reaction will change accordingly. Therefore, the original function can not be played.

　　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。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。

　　What's the treatment of expired potassium hydroxide? Is it the same as our garbage? The answer is No. In fact, the overdue treatment is mainly recycling. Because 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. The overdue recycling can not only protect the environment, save energy, drive the stable and sustainable development of social benefits, but also improve the efficiency of enterprises and save costs. However, companies operating overdue recycling need to have recycling qualification and certificates. Because potassium hydroxide is toxic and corrosive, it is one of the national pipe products.

　　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。

　　If you want to engage in the recycling industry, you need to obtain relevant permission. Unlicensed companies are not allowed to recycle. In addition, the recycling price is affected by many factors, so the recycling price is not fixed.