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.

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.

References in periodicals archive ?
Azo dye solution in DMF exhibits good stability, while azo dye with magnesium chloride shows decoloration process over the storage time period of 21 days.
The facilities produce and process titanium and zirconium, which generates large quantities of anhydrous magnesium chloride as a byproduct.
Magnesium chloride and sodium chloride allowed aerobic populations to significantly grow during storage.
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.
But in the US, where it is used in many states with weather much more severe than here, magnesium chloride is much less toxic to plant life and less corrosive to concrete and steel than sodium chloride (salt).
The process and the nature of formation of the reaction mass are regulated by changing the rate of introduction of titanium tetrachloride, the production process temperature and the regime of discharge of magnesium chloride to produce products with controlled composition.
The potential benefit is, unlike sodium chloride which is poured on to the track, magnesium chloride can be dissolved in water and put on with a bowser allowing some moisture to be maintained in the surface at the same time.
Add to the mix two sanders that lay the low-corrosive, liquid magnesium chloride - which operates at maximum effectiveness only at certain air temperatures - and you have the entire winter weather fleet.
Editor's note: Yes, it's true, Slow-Mag is made from magnesium chloride, a "salt" that is very stable and will not lose its potency with age any more than sodium chloride, ordinary table salt, would lose its strength with age.
Magnesium chloride is a "road salt" too, just as are calcium chloride and potassium chloride.
For small jobs, it may be feasible to use more potent, less environmentally toxic de-icers like magnesium chloride (85 cents per gallon) or calcium magnesium acetate ($675 a ton) instead of rock salt ($30 a ton).
Filtration of the leach liquor produces a magnesium chloride brine and a silica and iron residue.