Many facial cleansers and other products we use in our life contain potassium hydroxide. Adding it can have a good cleaning effect. However, because it is easy to deteriorate and is not easy to be found, if the deteriorated products are directly added, the cleaning effect of the finished products will be weakened, Today, Xiaobian will take you to see the additional measurement method of deterioration.

1、往樣品當(dāng)中添加進(jìn)去澄清的石灰水，如果發(fā)現(xiàn)有偶白色沉淀的出現(xiàn)生成，那么說(shuō)明氫氧化鉀出現(xiàn)了變質(zhì)的情況。

1. Add clarified lime water to the sample. If even white precipitation is found, it indicates that potassium hydroxide has deteriorated.

2、如果往樣品當(dāng)中滴加進(jìn)去過(guò)量的稀鹽酸發(fā)現(xiàn)有氣泡的出現(xiàn)，那么說(shuō)明產(chǎn)品已經(jīng)出現(xiàn)了變質(zhì)的情況。

2. If excessive dilute hydrochloric acid is added to the sample and bubbles are found, it indicates that the product has deteriorated.

3、還可以往樣品當(dāng)中添加進(jìn)去氯化鋇，如果發(fā)現(xiàn)有白色沉淀的生成，那么說(shuō)明產(chǎn)品已經(jīng)出現(xiàn)了變質(zhì)的情況。

3. Barium chloride can also be added to the sample. If white precipitation is found, it indicates that the product has deteriorated.

氫氧化鉀

Potassium hydroxide

4、還有就是檢產(chǎn)品部分變質(zhì)的時(shí)候可以通過(guò)往當(dāng)中加入進(jìn)去過(guò)量氯化鋇一直等到完全沉淀，等到沉淀已經(jīng)靜止之后取上層的清液放置在試管當(dāng)中，然后往當(dāng)中滴加無(wú)色的酚酞溶液，如果酚酞變紅了那么就說(shuō)明當(dāng)中是有堿性物質(zhì)的。

4. In addition, when the product is partially deteriorated, you can add excess barium chloride into it until it is completely precipitated. After the precipitation has stopped, take the upper clear liquid and place it in the test tube, and then drop colorless phenolphthalein solution into it. If phenolphthalein turns red, it indicates that there are alkaline substances in it.

5、如果往當(dāng)中加入進(jìn)去過(guò)量氯化鋇2：1如果有白色沉淀的生成，那么就說(shuō)明產(chǎn)品出現(xiàn)了部分變質(zhì)的情況。

5. If excessive barium chloride 2:1 is added into it, if white precipitation is formed, it indicates that the product has been partially deteriorated.

6、加入無(wú)色酚酞如果無(wú)色酚酞不變色那么就說(shuō)明已經(jīng)是完全變質(zhì)了。如果無(wú)色酚酞已經(jīng)變紅了那么就說(shuō)明只是部分變質(zhì)，其中還有一部分的產(chǎn)品是有一些效果的。

6. Add colorless phenolphthalein. If colorless phenolphthalein does not change color, it indicates that it has completely deteriorated. If the colorless phenolphthalein has turned red, it means that it is only partially deteriorated, and some of the products have some effects.

上面介紹的就是氫氧化鉀是否變質(zhì)的檢測(cè)方法，因?yàn)楫a(chǎn)品本身在變質(zhì)之后是無(wú)法進(jìn)行使用的，所以我們?cè)诮?jīng)過(guò)檢測(cè)之后發(fā)現(xiàn)已經(jīng)變質(zhì)那么需要及時(shí)的進(jìn)行處理不再進(jìn)行使用，還有就是在進(jìn)行檢測(cè)的時(shí)候需要注意一定不要隨意的往當(dāng)中添加其他的化學(xué)物質(zhì)。

The above is the detection method of whether potassium hydroxide has deteriorated. Because the product itself cannot be used after deterioration, we need to deal with it in time and no longer use it after detection. In addition, we need to pay attention not to add other chemicals to it at will when testing.