The anhydrous form of calcium chloride is very Hygroscopic. It is used as a desiccant. Calcium chloride also exists as dihydrate and hexahydrate crystals. These crystalline forms are used in antifreeze solutions, fire extinguishers, fireproofing solutions, wood preservatives, as a gelling agent for Starch size and to melt snow and ice from roads. Calcium chloride was used to speed up the rate of cure in mortar, Shotcrete, and dry-mix Concrete until 1973 when it was replaced by a non-chloride accelerator because it corroded Steel reinforcements.
- Contact may cause irritation.
- LabChem: MSDS
Physical and Chemical Properties
Soluble in water (with the evolution of heat). pH = 8 - 9
|Melting Point||772 C|
|Molecular Weight||mol. wt. = 110.98|
|Boiling Point||>1600 C|
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 140
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
- Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
- Thomas C. Jester (ed.), Twentieth-Century Building Materials, McGraw-Hill Companies, Washington DC, 1995
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1630