The main purpose is mainly used in the inorganic industry. It is the basic raw material for the production of various potassium salts or alkalis, such as potassium hydroxide, potassium sulfate, potassium nitrate, potassium chlorate, and potassium alum. In the pharmaceutical industry, it is used as a diuretic and a medicine for preventing and treating potassium deficiency. The dye industry is used to produce G salt, reactive dyes, etc. Agriculture is a kind of potash fertilizer. Its fertilizer effect is fast, and it can be applied directly to farmland to increase the moisture in the lower layer of the soil and have the effect of drought resistance. However, it is not suitable to be used in saline soil and to tobacco, sweet potato, sugar beet and other crops. Potassium chloride has a taste similar to sodium chloride (bitterness), and is also used as an additive for low-sodium salt or mineral water. In addition, it is also used to manufacture muzzle or muzzle flame suppressant, steel heat treatment agent, and for photography. It can also be used in medicine, scientific applications, food processing, and some potassium chloride can be substituted for sodium chloride in table salt to reduce the possibility of high blood pressure. [6] Potassium chloride is a commonly used electrolyte balance regulator in clinical medicine. It has a definite clinical effect and is widely used in various clinical departments.