Calcium chloride has strong hygroscopicity, so it can be used to make desiccant. It has great value in food manufacturing, building materials, medicine and biology. At the same time, it is widely used in industry and medicine. Use; 1. It is used as a multi-purpose desiccant, such as drying nitrogen, oxygen, hydrogen, hydrogen chloride, sulfur dioxide and other gases. As a dehydrating agent in the production of ethanol, ester, ether and acrylic resin, calcium chloride aqueous solution is an important refrigerant for refrigerator and ice making. It can accelerate the hardening of concrete and improve the cold resistance of building mortar. This is a good building antifreeze, which can be used as port defoamer, road dust collector and fabric flame retardant. It can be used as a protective agent and refining agent in aluminum magnesium metallurgy. It is a precipitant for the production of lake pigments. It is used for deinking waste paper and is also the raw material for the production of calcium salt. 2. It can be used as chelating agent, curing agent, calcium fortifier, refrigeration refrigerant, desiccant, anti caking agent, antibacterial agent, pickling agent, tissue modifier, etc. 3. It can also be used as desiccant, road dust collector, defoamer, fabric flame retardant, food preservative, calcium salt, etc. 4. It can be used as lubricating oil additive. 5. Used as analytical reagent.