Calcium chloride anhydrous is industry and the laboratory commonly used desiccant, as in nitrogen, oxygen, hydrogen and sulfur dioxide, hydrogen gas, such as dry, but cannot be used to dry ethanol and ammonia (reacts with calcium chloride CaCl2 · 4 C2H5OH and CaCl2 · eight NH3). Production alcohol, ether and ester, when used as dehydrant acrylic resin. Inorganic industry used to make metal calcium, barium chloride, all kinds of calcium salt (such as calcium phosphate, etc) of raw material. Building industry used as antifreeze, to speed up the construction of the hardened and increase chillness-tolerance of mortar. Microbial industrial used as haploid breeding medium. The analysis was used for the carbon content of steel in learning, the whole blood serum inorganic phosphorous dissolved, grapes and the serum of alkaline phosphatase vigor, etc. Used for aluminum and magnesium metallurgy protectant, refining the agent. In addition, is also used for fabric fire agent, harbour WuJi, road away dust collection agent and food preservatives, etc. Is the production of color pigment precipitation agent of the deposit. Used for waste paper deinking processing. Calcium chloride solution is the cooling industry important coolant. In use process, because of absorbs moisture from the air and make its concentration decreased. Especially in the open system. In order to prevent the concentration of calcium chloride reduced, cause temperature of freezing point, it must be regularly determine the proportion of calcium chloride with hydrometer. If the lower concentration, should be added to keep in the appropriate concentration. Calcium chloride solution to the equipment corrosive, when using, should pay attention to.