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Calcium chloride is a chemical substance composed of chlorine and calcium, and its chemical formula is CaCl2, which is slightly bitter. It is a typical ionic halide, which is white and hard fragments or particles at room temperature. Its common applications include brine, road deicer and desiccant used in refrigeration equipment.
Main applications
Industrial use
Used as a multi-purpose desiccant, such as nitrogen, oxygen, hydrogen, hydrogen chloride, sulfur dioxide and other gases. Used as dehydrating agent in the production of alcohol, ester, ether and acrylic resin. Calcium chloride aqueous solution is an important refrigerant for freezer and ice making, which can accelerate the hardening of concrete and increase the cold resistance of building mortar. It is an excellent antifreeze for buildings.
Used as port antifogging agent, road cleaner and fabric flame retardant. Used as protective agent and refining agent in aluminum-magnesium metallurgy. It is a precipitant for producing lake pigments. Deinking for waste paper processing. It is a raw material for producing calcium salt.
desiccant
Granular anhydrous calcium chloride is often used as a desiccant to fill drying pipes, and giant algae (or seaweed ash) dried with calcium chloride can be used to produce soda ash. Some home dehumidifier use calcium chloride to absorb moisture in the air. Calcium chloride can also be used as a desiccant or dehydrating agent for gases and organic liquids.
Because calcium chloride is neutral, it can dry acidic or alkaline gases and organic liquids, and it can also dry a small amount of gases, such as nitrogen, oxygen, hydrogen, hydrogen chloride, sulfur dioxide, carbon dioxide, nitrogen dioxide and so on. In the lab.
But it can't be used to dry ethanol and ammonia, because ethanol and ammonia will react with calcium chloride to produce alcohol compound CaCl2 4C2H5OH and ammonia compound CaCl2 8NH3 respectively. Anhydrous calcium chloride can also be made into household products and used as air absorbent. Anhydrous calcium chloride, as a water absorbent, has been approved by FDA for dressing first aid, and its function is to ensure the dryness of wounds.
food
As a curing agent, calcium chloride can be used in canned vegetables. It can also solidify tofu to form tofu, and it can also be used as a raw material for cooking molecular food to gelatinize the surface of vegetables and fruit juice, and react with sodium alginate to form caviar-like balls. As an electrolyte, it is added to sports drinks or some soft drinks including bottled water.
Because calcium chloride itself has a very strong salty taste, it can be used to make pickles instead of salt without increasing the sodium content of food. Calcium chloride can lower the freezing point and delay the freezing of caramel in caramel filled chocolate bars.