Calcium chloride is a chemical compound comprised of calcium and chlorine. It is a solid when kept at room temperature. The compound contains no water, but can readily absorb and retain moisture from external sources such as the air, snow and ice. When the compound has become saturated with water, it will dissolve. Calcium chloride has several industrial, engineering and medical uses.
Road De-Icer
Calcium chloride is commonly used to melt snow and ice from roads and sidewalks, according to Tim Carter, author of the Ask the Builder website. It is preferred as a de-icer because it can continue to melt ice and snow when the temperature drops below zero degrees F, unlike some other compounds used to de-ice. While it can be used on concrete, calcium chloride may attack the surface of the concrete, contributing to cracks and pitting.
Dust Controller
Calcium Chloride is also used to control the clouds of dust created by cars traveling along dirt and gravel roads, according to the Morris Chemicals website. Its properties as a dessicant allow it to absorb and retain moisture, holding it on the surface of the road. Calcium chloride can also reduce the amount of gravel replacement necessary to maintain gravel roads, and help dirt roads last longer.
Hypocalcemia
Calcium chloride can be used to efficiently raise calcium levels in the body, according to Drugs.com. This is particularly useful in patients with acute hypocalcemia, or low calcium, when a rapid elevation of body calcium is necessary. When used for calcium elevation, it typically comes in the form of a solution of 10 percent calcium chloride diluted with 90 percent water. The solution is administered via injection.
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