The molecular formula of sodium persulfate is Na2S2O8. To the naked eye, it is a white tasteless powder. In general, it is very stable, but it is "heat-resistant", and it will decompose rapidly when heated or under humid conditions.

实验表明，它能溶于水。溶于水时它会放出氧气，不过其放氧速度比较缓慢。其溶于水的反应式为：2 Na2S2O8 + 2 H2O = 2 Na2SO4 + 2 H2SO4 + O2↑ ，在这方程式中我们看到，过硫酸钠溶于水时还产生了过硫酸根离子，这个离子大有用处，因为它有强氧化性，利用这一特性，过硫酸钠可用作漂白剂、金属表面处理剂、引发剂等等。

Experiments show that it can be dissolved in water. When dissolved in water, it will release oxygen, but its oxygen release rate is relatively slow. The reaction formula of dissolving in water is: 2 Na2S2O8 + 2 H2O = 2 Na2SO4 + 2 H2SO4 + O2 ↑. In this equation, we can see that sodium persulfate also produces persulfate ion when dissolving in water. This ion is very useful because it has strong oxidation. Using this characteristic, sodium persulfate can be used as bleach, metal surface treatment agent, initiator, etc.

而过硫酸盐可以产生自由基，这一反应对于去除石油类污染物具有深远的意义。】

Persulfate can activate the production of free radicals, which is of far-reaching significance for the removal of petroleum pollutants.]

可以说，水是过硫酸钠的“贵人”，它们相互合作，各自发挥自己的特性，并产生良好的反应结果。当然，这是从两者的应用上来说的，在过硫酸钠储存的角度而言，遇到水，过硫酸钠就“倒霉”了。在储存时必须保证储存条件的干燥，并且更好存在在密闭的容器中，避免阳光直射，以免引起其分解。

It can be said that water is the "noble" of sodium persulfate. They cooperate with each other, give play to their own characteristics and produce good reaction results. Of course, this is from the application of both. From the perspective of sodium persulfate storage, sodium persulfate will be "unlucky" in case of water. During storage, the storage conditions must be dry, and it is best to store it in a closed container to avoid direct sunlight, so as not to cause its decomposition.