Difference between revisions of "Calcium chloride"
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== Description == | == Description == | ||
| − | The anhydrous form of calcium chloride is very [[hygroscopic]] and | + | The anhydrous form of calcium chloride is very [[hygroscopic]] and thus 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 [[ice melter|melt snow and ice]] from roads. Calcium chloride was used to speed up the rate of cure in [[mortar%20%28masonry%29|Mortar]], [[shotcrete]], and dry-mix [[concrete]] until 1973 when it was replaced by a non-chloride accelerator because it corroded [[steel]] reinforcements. Very small amounts of calcium chloride are used in food preparation as a sequestrant, firming agent or to increase calcium content. |
== Risks == | == Risks == | ||
* Contact may cause irritation | * Contact may cause irritation | ||
| − | * | + | * Reaction with water is exothermic |
| + | * Ingestion may cause burns | ||
* LabChem: [https://www.labchem.com/tools/msds/msds/75446.pdf MSDS] | * LabChem: [https://www.labchem.com/tools/msds/msds/75446.pdf MSDS] | ||
| Line 35: | Line 36: | ||
==Resources and Citations== | ==Resources and Citations== | ||
| − | + | * Wikipedia: [https://en.wikipedia.org/wiki/Calcium_chloride Calcium chloride] Accessed July 2023 | |
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 140 | * 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 | * 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 | * Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979 | ||
| − | |||
* Book and Paper Group, ''Paper Conservation Catalog'', AIC, 1984, 1989 | * Book and Paper Group, ''Paper Conservation Catalog'', AIC, 1984, 1989 | ||
| − | |||
* Thomas C. Jester (ed.), ''Twentieth-Century Building Materials'', McGraw-Hill Companies, Washington DC, 1995 | * 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 | * ''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 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1630 | ||
Latest revision as of 12:26, 14 July 2023
Description
The anhydrous form of calcium chloride is very Hygroscopic and thus 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. Very small amounts of calcium chloride are used in food preparation as a sequestrant, firming agent or to increase calcium content.
Risks
- Contact may cause irritation
- Reaction with water is exothermic
- Ingestion may cause burns
- LabChem: MSDS
Physical and Chemical Properties
Soluble in water (with the evolution of heat). pH = 8 - 9
| Composition | CaCl2 |
|---|---|
| CAS | 10043-52-4 |
| Melting Point | 772 C |
| Density | 2.152 g/ml |
| Molecular Weight | mol. wt. = 110.98 |
| Boiling Point | >1600 C |
Resources and Citations
- Wikipedia: Calcium chloride Accessed July 2023
- 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