Compared with other alkaline products, the price of potassium hydroxide is higher than that of other alkaline products. This is also because its performance is very good. For example, it needs to be used in many cleaning products. It plays a main role in cleaning and does not harm the skin. However, because it is still alkaline, it is in progress When it is stored, there may be deterioration, so how can we identify whether it has deteriorated or not when we use it.

1、我们都知道碱性物质和酸性物质混合在一起的时候会进行中和反应，而这两者在进行反应的过程当中是会产生盐和水的，可是如果是变质的和酸性物质进行反映的是会有气泡产生的，这种方法可以排除出来产品有没有变质

1. We all know that alkaline substances and acidic substances will be neutralized when they are mixed together, and the two will produce salt and water during the reaction process. However, if it is deteriorated and acidic substances are reflected, there will be bubbles. This method can be used to exclude whether the product has deteriorated

2、还可以将氯化钡溶液添加到产品当中进行搅拌，如果在搅拌之后出现沉淀物那么就表示氢氧化钾已经变质。

2. Barium chloride solution can also be added to the product for stirring. If there is sediment after stirring, it means that the potassium hydroxide has deteriorated.

3、还可以先准备一杯已经饱和的片碱溶液，然后再将需要检测的产品添加进去如果仍然可以溶解进去，那么说明这个溶解进去的可能是其他的物质了，如果无法溶解进去依然以沉淀的状态存在的时候那么一般出现变质的可能性会小一些。

3. You can also prepare a cup of saturated caustic soda solution, and then add the product to be tested. If it can still be dissolved in, it means that other substances may be dissolved in it. If it can not be dissolved in and still exists in the precipitation state, the possibility of deterioration will be less.

上面介绍的就是判断氢氧化钾有没有变质的几种方法，其实很多的碱性物质在进行使用的时候即便是出现了变质也是不影响使用的，但是该产品因为比较广泛的应用在很多的洗护用品当中，所以在进行使用的时候如果出现了变质的情况是非常影响正常使用的，甚可能会导致产品在进行使用的时候对皮肤产生一定的伤害。

The above is to judge whether potassium hydroxide has deteriorated several methods. In fact, many alkaline substances will not affect the use even when they are used. However, the product is widely used in many cleaning products, so if the deterioration occurs during the use, it will affect the normal use, even It may cause certain damage to the skin when the product is used.