calcium chloride


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calcium chloride,

CaCl2, chemical compound that is crystalline, lumpy, or flaky, is usually white, and is very soluble in water. The anhydrous compound is hygroscopic; it rapidly absorbs water and is used to dry gases by passing them through it. Calcium chloride is commercially available usually as the dihydrate, CaCl2·2H2O; it is used to melt ice on roads, to control dust, in brines for refrigeration, and as a preservative in foods. It is also used in the monohydrate and hexahydrate forms. Calcium chloride is a byproduct of the Solvay processSolvay process
[for Ernest Solvay], commercial process for the manufacture of sodium carbonate (washing soda). Ammonia and carbon dioxide are passed into a saturated sodium chloride solution to form soluble ammonium hydrogen carbonate, which reacts with the sodium chloride to
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 (a major source of the compound) and is present in natural brines.

Calcium Chloride

 

CaCl2, a salt; colorless crystals with a density of 2.51 g/cm3 and melting point of 772°C. Calcium chloride easily absorbs water vapor, subsequently deliquescing. Its solubility per 100 g H2O is 74 g at 20°C and 159 g at 100°C. Aqueous solutions of calcium chloride freeze at low temperatures (20-percent solution at — 18.5°C and 30-percent solution at — 48°C). Calcium chloride forms the hydrate CaCl2 • 6H2O, which remains stable up to 29.8°C;at high temperatures, crystalline hydrates are precipitated from the saturated solution with four, two, and one molecules of H2O. When CaCl2⋅6H2O (58.8 percent) is mixed with snow or ice (41.2 percent), the temperature drops to — 55°C (cryohydric point).

Calcium chloride is obtained as a byproduct in the manufacture of soda and is used for the preparation of calcium metal, in the drying of gases and liquids, in refrigeration, and in medicine.

calcium chloride

[′kal·sē·əm ′klȯr‚īd]
(inorganic chemistry)
CaCl2 A colorless, deliquescent powder that is soluble in water and ethanol; used as an antifreeze and as an antidust agent.

calcium chloride

A chemical salt used in plastic concrete as an accelerator.
References in periodicals archive ?
The calcium chloride from the chemical plant will be supplied mostly for the purposes of the markets of North and South America, Western Europe, Middle East, and Africa.
A solution of calcium chloride and fulvic acid and a solution of calcium chloride and humic acid were prepared.
The project will take us to a higher growth trajectory as it is the first calcium chloride plant in UAE.
The Arkansas plant will allow TETRA to have ample supply of calcium chloride and replaces shrinking and higher cost existing supply.
Also set to debut next winter is Morton Safe-T-Power ice melter, a calcium chloride product that works at temperatures as low as minus 25 degrees.
When the sodium alginate contacted the calcium chloride, the calcium displaced the sodium and formed a network of bonds between chains of the polysaccharide, explains McQuade.
5% calcium chloride in irrigation water (Barden and others 1990; Beelman 1987; Beelman and Simons 1996; Kukura and others 1998; Miklus and Beelman 1996), irrigation with 50 ppm stabilized chlorine dioxide in combination with 0.
PELADOW[R] calcium chloride pellets are the most highly concentrated form of the product and, therefore, provide the most rapid deicing action over the greatest range of temperatures.
Finnish chemical industry group Kemira Oyj said on Thursday (30 September) that its agreement with the US company TETRA Technologies Inc for the sale of Kemira's calcium chloride business had been confirmed.
In this test, a plate of calcium chloride is weighed, then placed on the concrete and covered by a dome or other apparatus to trap the moisture vapor.
A 14-gauge Angiocath plastic catheter was attached, and 1 ml of bovine thrombin resuspended in 10% calcium chloride (1,000 U/ml of thrombin plus 100 mg/ml of calcium chloride) was drawn into the syringe with the platelet concentrate.

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