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Calcium Chloride CAS 10043-52-4 CaCl2 Chemical Additives
Product Characteristics
CAS: 10043-52-4
EINECS: 233-140-8
MF: CaCl2
Basic Information
Calcium chloride is a colorless cubic crystal. Industrially, it appears as a white or gray-white porous block, granular form, or honeycomb structure. It has no odor and a slightly bitter taste. The relative density is 2.15, with a melting point of 782°C and a boiling point above 1600°C. It is highly hygroscopic, easily deliquescing when exposed to air.
Calcium chloride is soluble in water, releasing significant heat and forming a slightly acidic solution. It is also soluble in alcohol, acetone, and acetic acid. When combined with ammonia or ethanol, it forms complexes such as CaCl2 · 8NH3 and CaCl2 · 4C2H5OH. At room temperature, it typically crystallizes from aqueous solution as the hexahydrate. Upon heating to 30°C, it dissolves in its crystallization water and loses water gradually upon further heating. At 200°C, it becomes the dihydrate, and upon heating to 260°C, it transforms into white, porous anhydrous calcium chloride.
Applications
Calcium chloride is widely used as a desiccant for drying gases such as nitrogen, oxygen, hydrogen, hydrogen chloride, and sulfur dioxide. In the production of alcohols, esters, ethers, and acrylic resins, it serves as a dehydrating agent. The aqueous solution of calcium chloride is a crucial refrigerant for freezers and ice-making systems.
In the construction industry, calcium chloride accelerates the hardening of concrete and enhances the cold resistance of building mortar. It also functions as an anti-fog agent, road dust control agent, and fabric fire retardant in port environments. Additionally, it is used as a protective agent in aluminum and magnesium metallurgy and as a refining agent.
In pigment production, calcium chloride acts as a precipitant for lake pigments. It is also employed in waste paper processing for deinking. As a raw material, it is essential for producing various calcium salts. In the food industry, calcium chloride is used as a chelating agent and coagulant.
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