Potassium hydroxide is a familiar chemical product, mainly white translucent crystalline solid. In fact, what we don't understand is that chemical products are easy to deteriorate due to their own characteristics, but it is difficult to distinguish them. At this time, we need to have a complete set of methods to detect their qualitative changes. Then, let's give you a specific explanation.

一、樣品中滴加澄清石灰水，若有白色沉淀生成，則氫氧化鉀變質。

1、 Clear lime water is added to the sample. If white precipitate is formed, potassium hydroxide will deteriorate.

二、樣品中滴加過量稀鹽酸若有氣泡產生，則產品變質。

2、 If excessive dilute hydrochloric acid is dripped into the sample, the product will deteriorate if there are bubbles.

三、樣品中加氯化鋇，若有白色沉淀生成，則該產品變質。

3、 If barium chloride is added to the sample, if white precipitate is formed, the product will deteriorate.

四、檢驗氫氧化鉀部分變質：

4、 Inspection of partial deterioration of potassium hydroxide:

1、加入過量氯化鋇完全沉淀，待沉淀完全靜止后，取上層清液于試管內，滴加無色酚酞溶液，酚酞變紅，則證明有NaOH。

1. Add excess barium chloride to precipitate completely. After the precipitate is completely static, take the supernatant into the test tube and drop colorless phenolphthalein solution. If phenolphthalein turns red, it is proved that there is NaOH.

2、在產品中加入過量氯化鋇2：1.若有白色沉淀生成，則說明該產品變質

2. If white precipitate is formed, the product is deteriorated

3、加入無色酚酞，若無色酚酞不變色，則說明完全變質。若無色酚酞變紅，說明部分變質。

3. Add colorless phenolphthalein, if colorless phenolphthalein does not change color, it means complete deterioration. If the colorless phenolphthalein turns red, it means that part of it is deteriorated.

以上就是關于氫氧化鉀的變質檢測方法介紹，產品變質后是不能在使用的，嚴重影響使用的效果。通過以上的介紹我們發現以上的檢測方法主要是通過借助別種化工原料在進行的。因此，我們在進行檢測的時候一定要注意，不要將這些化工原料亂放。

The above is about the deterioration detection method of potassium hydroxide. The product can not be used after deterioration, which seriously affects the effect of use. Through the above introduction, we found that the above detection methods are mainly carried out with the help of other chemical raw materials. Therefore, we must pay attention to safety when testing, do not put these chemical raw materials in disorder.