Calcium chloride dihydrate, white, off-white or slightly yellow flakes or bulk solids, bitter and astringent. Density of 1.85g / cm3 (20 ° C). Soluble in water, soluble in alcohol, insoluble in ether. Their solution was neutral or slightly alkaline. Corrosive. Heated to 260 ℃ when dehydration becomes anhydrous. Deliquescent strong. Legal base from ammonia soda ash production in distillery waste (containing calcium chloride 100g / L), after purification, clarification, evaporation, after the separation of sodium chloride, the mother liquor is clarified, continued concentrated calcium chloride content of 70% when cooling system. Hydrochloric acid and limestone powder can also be used in the reaction.
Usually used as refrigerants, antifreeze, fire extinguishing agents, for melting ice and snow melting, manufacturing anhydrous calcium chloride, flame retardant cotton fabric, rubber production of condensate agent. Can accelerate hardening and increased tolerance to cold concrete construction mortar, but also used as anti-fogging agent, port and road dust agent. From industrial grade saturated solution of calcium chloride dihydrate, adding bleaching agents, in addition to heavy metal agents, in addition to arsenic solution purification, filtration to remove impurities, liquid cooling and crystallization, solid-liquid separation, drying food grade product can be obtained. Coagulant used cans and soy products, calcium supplements.
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