Magnesium Chloride

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magnesium chloride

[mag′nē·zē·əm ′klȯr‚īd]
(inorganic chemistry)
MgCl2·6H2O Deliquescent white crystals; soluble in water and alcohol; used in disinfectants and fire extinguishers, and in ceramics, textiles, and paper manufacture.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Magnesium Chloride


MgCl2, a salt; colorless crystals. Density, 2.316 g/cm3; melting point, 713°C; boiling point, 1412°C. It is extremely hygroscopic; its solubility in water at 20°C is 35.3 percent (by weight). It forms crystalline hydrates with one, two, four, six, eight, and 12 water molecules. Hydrous magnesium chloride, MgCl2-6H2O, is stable at temperatures from —3.4° to 116.7°C. It occurs naturally as the mineral bischofite; it is extracted in large quantities during the concentration of ocean brines. Magnesium chloride forms double salts, an example of which is the highly valuable mineral carnallite, KCl.MgCl2-6H2O (a source of Mg and KC1). The production of magnesium chloride involves the dehydration of bischofite to MgCl2»2H2O, which is then dehydrated in a flow of HC1 at 100°-200°C. Magnesium chloride is primarily used in the manufacture of metallic magnesium; MgCl2 • 6H2O is used in the preparation of magnesia cements.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
All samples were vacuum saturated in accordance with ASTM C1202 for 24 hours using the following solutions: 3% sodium chloride (NaCl), 3% magnesium chloride (Mg[Cl.sub.2]), and water.
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The government complaint alleges that both companies improperly stored, transported and disposed of anhydrous magnesium chloride waste over a period of several years.
Safe Step Power 4300 Dual-Blend contains a high-quality blend of sodium chloride and magnesium chloride and melts ice down to minus 7 degrees Fahrenheit.
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The cleaning composition is comprised of a water miscible solvent; an inorganic salt selected from the group consisting of sodium chloride, sodium bromide, magnesium bromide, magnesium chloride, potassium chloride, potassium bromide and zinc chloride, and water.
Downside is, the liquid variant of magnesium chloride, which works down to -20C, costs TWELVE times more than regular salt and grit.
They prepared very hard water by dissolving calcium chloride and magnesium chloride in distilled water.
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For instance, this winter we are going to run a field trial at Swindon using magnesium chloride rather than sodium chloride as an anti-freezing agent.