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Used as a multi-purpose desiccant, such as nitrogen, oxygen, hydrogen, hydrogen chloride, sulfur dioxide and other gases drying. Used as dehydrating agent in the production of alcohols, esters, ethers and acrylic resins. Calcium chloride aqueous solution is an important refrigerant for chillers and ice making, which can accelerate the hardening of concrete and increase the cold resistance of building mortar, and is an excellent building antifreeze. Used as port fogging agent and road dust collector, fabric fire retardant. Used as a protective agent and refining agent for aluminum and magnesium metallurgy. It is a precipitating agent for the production of lake pigments. Used for deinking waste paper processing. It is a raw material for the production of calcium salts