Sodium sulfate is what we call sodium sulfate. The chemical formula of sodium sulfate is: Na ú so ₄; the chemical formula of sodium persulfate is: Na2S2O8. From this, we can see that although there is only one word difference between sodium sulfate and sodium persulfate, their physical and chemical properties are very different.

过硫酸钠，它的化学键里含有一个O-O键，这键很弱，却因此而让其具有很强的氧化性。所以，过硫酸钠是具有强氧化性的，但硫酸钠没有。但硫酸钠是硫酸根与钠离子化合生成的盐，硫酸钠溶于水且其水溶液呈中性，溶于甘油而不溶于乙醇。它具有吸水性，暴露于空气中易吸水，生成十水合硫酸钠，又名芒硝。利用这一特性，硫酸钠可用作干燥剂。而过硫酸钠没有吸水性。所以在某些特殊用途时，利用两者的特性，将两者结合在一起能达到不同的使用效果。

Sodium persulfate, its chemical bond contains an O-O bond, which is very weak, but therefore it has a strong oxidation. Therefore, sodium persulfate has strong oxidation, but sodium sulfate does not. But sodium sulfate is a salt formed by the combination of sulfate radical and sodium ion. Sodium sulfate is soluble in water and its aqueous solution is neutral, soluble in glycerol but insoluble in ethanol. It has water absorption and is easy to absorb water when exposed to the air to form sodium sulfate decahydrate, also known as mirabilite. Using this property, sodium sulfate can be used as desiccant. But sodium persulfate has no water absorption. Therefore, in some special uses, using the characteristics of the two, the combination of the two can achieve different results.

过硫酸钠也是过硫酸盐的一种，又称过氧二硫酸钠。过硫酸钠溶于水产生的过硫酸根离子是一种稳定的强氧化剂，过硫酸盐产生自由基的反应对于去除石油类污染物具有很大的意义。也因为它的氧化性能，过硫酸钠的用途很广：在农业中让受污染的土壤修复、环境处理中用来进行水处理（废水净化）、废气处理、有害物质氧化降解；工业上作为乳胶或丙烯酸单体聚合液、醋酸乙烯、氯乙烯等产品的引发剂，它还可以作为脱浆剂和漂白剂，染发剂等等。

Sodium persulfate is also a kind of persulfate, also known as sodium peroxydisulfate. Sodium persulfate dissolved in water produces persulfate, which is a kind of stable strong oxidant. The reaction of free radicals activated by persulfate is of great significance for the removal of petroleum pollutants. Also because of its oxidation performance, sodium persulfate has a wide range of uses: in agriculture, it can be used for water treatment (waste water purification), waste gas treatment, and oxidation and degradation of harmful substances in agriculture; in industry, it can be used as initiator of latex or acrylic monomer polymerization solution, vinyl acetate, vinyl chloride and other products, and can also be used as desizing agent and bleaching agent, and dyeing hair And so on.