To use: Hydrochloric acid is a strong inorganic acid solution, which is widely used in industrial processes, such as the refining of metals. Hydrochloric acid often determines the quality of products. In the industry of high purity requirements (such as food, pharmaceutical and drinking water, etc.), commonly used high purity Hydrochloric acid to regulate the pH of water flow; Industrial-grade Hydrochloric acid can also be used to neutralize the pH of wastewater or to treat water in swimming pools; Hydrochloric acid can also be used to examine metals or their compounds. The platinum wire used for testing must be washed with dilute Hydrochloric acid to remove the influence of impurities. Hydrochloric acid has many small-scale uses, such as leather processing, salt production, and construction; The petroleum industry can also inject Hydrochloric acid into an oil well to dissolve rock and create a giant hole. Hydrochloric acid is commonly used in the production of gelatin, food, food raw materials and food additives.