Calcium chloride is an inorganic compound with the chemical formula CaCl₂, and its common forms are dihydrate (CaCl·*2HOO) and anhydrous, with relative molecular weights of 110.98 (anhydrous) and 147.02 (dihydrate).Calcium chloride is odorless, slightly bitter and spicy in taste. The substance is a white crystalline powder, granular, flaky or bulk. Common forms include anhydrous powder, dihydrate crystal, granular, and flaky.It is soluble in water and releases a lot of heat when dissolved. The aqueous solution is weakly acidic with a pH value of about 4.5-6.0. It is soluble in ethanol and acetone, and insoluble in ether.It is very easy to absorb moisture and agglomeration in the air. Anhydrous calcium chloride has strong water absorption and can be used as a desiccant. When calcium chloride dihydrate is heated to 175℃, it loses its crystallized water and becomes anhydrous calcium chloride. It will decompose if it continues to be heated to high temperature. It needs to be sealed and stored in a cool and dry place, away from humid environments and alkaline substances.It is used in industrial production in water treatment, building materials, food, medicine, chemical industry and other fields, as a desiccant, coagulant, antifreeze, and snow remover, and is also used in drinking water softening, concrete antifreeze, food preservation and other processes.Its excellent water absorption and antifreeze properties can efficiently dry gases and liquids in the chemical industry, and it can quickly melt snow and ice in the field of road maintenance. It is widely used.

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1. It is used as a water softener, fungicide, and fluoride remover in the field of water treatment. It is used for softening drinking water and industrial wastewater treatment (such as printing and dyeing wastewater, electroplating wastewater, etc.). It can effectively remove hardness ions (calcium, magnesium) from the water and reduce the hardness of the water. At the same time, it can kill harmful microorganisms in the water, remove fluoride ions from the water, improve water quality, and meet production and domestic water requirements.
2. It is used as a concrete antifreeze and quick-setting agent in the building materials industry. It is used in construction projects to reduce the freezing point of concrete, prevent concrete from freezing and cracking in a low temperature environment, speed up the condensation rate of concrete, and improve the early strength of concrete. It is suitable for winter construction and construction in low-temperature areas.
3. It is used as a snow removal agent and ice melting agent in the field of road maintenance. It is used for snow removal and ice melting in roads, railways, airports and other places. It can quickly reduce the melting point of ice and snow, accelerate the melting of ice and snow, and is not easy to damage roads and vegetation. High efficiency and low cost are the core materials for road maintenance in winter.
4. It is used as a food additive in the food industry, as a coagulant, desiccant, and preservative, and is used in the processing of soy products, dairy products, canned food, etc., which can make soy products have a firmer texture and better taste. At the same time, it can dry the moisture in the food packaging, extend the shelf life of the food, and strictly comply with food-grade safety standards.
5. The pharmaceutical industry is used as pharmaceutical raw materials and desiccants for the production of calcium supplements, injections and other pharmaceutical products. It can supplement the calcium ions needed by the human body. At the same time, it can be used as a desiccant for pharmaceutical preparations to prevent moisture absorption and deterioration of drugs and meet the high standards of the pharmaceutical industry.
6. It is used as a desiccant, dehydrating agent, and catalyst in the chemical industry. It is used for the drying of gases (such as ammonia, hydrogen) and liquids (such as ethanol), and for dehydration treatment in organic synthesis reactions. It can also be used as a catalyst to assist the reaction. It is one of the important basic inorganic chemical raw materials.
7. It is used as a fabric finishing agent and leather preservative in the light industry to shape and soften textiles to improve the feel and stability of fabrics; it is used in the leather industry for anticorrosive and dehydration treatment of leather to prevent leather mildew and improve leather quality.
8. It is used as a chemical reagent in the laboratory, as a desiccant, dehydrating agent, and buffer, and is used in experimental operations such as chemical analysis, organic synthesis, and sample preservation. It can also be used to prepare calcium salts and calibrate experimental instruments to assist in the smooth progress of various experiments.