colorless crystals which, while in an atmospheric environment, rapidly begin to disintegrate - is magnesium chloride, whose formula MgCI2.If they are dissolved in water, the solution thus obtained is widely used for the production of various building materials synthetic origin, for example, magnesia cement.Storage of the substance must be carried out in a sealed container, since it is very hygroscopic.
Being well water soluble substance, magnesium chloride found in normal seawater, and it is found in deposits of potash, there it is in the form of hexahydrate.Therefore this substance is not produced in any laboratory and industrial process and is used to retrieve the natural compound, which was purified, and the obtained crystals were crushed.As a starting material, used in the preparation of MgCl2 and magnesium oxide, for the production of fireproof wood impregnation.In addition, magnesium chloride used for the preparation of so-called Sorel cement.During the production of calcined magnesium oxide is added to a concentrated solution of magnesium chloride.
properties of the substance - rapid solidification at normal atmospheric temperature - allows you to use it as ksilolita, sealing and binding construction material.Astringent properties allow the use of MgCl2 at pressing sawdust and receiving fiberboard.Zvukoteploizoliruyuschy fiberboard used as a material.The effect of hardening is provided by the hydrolysis process and obtain in the course of a salt Mg2OCl2, which is insoluble in water.
substance magnesium chloride, because of its high water absorption, ability to participate in the formation of hydrates with different numbers of water molecules.The level of hygroscopicity so large that if the ambient humidity is below 50%, magnesium chloride, as well as calcium chloride and lithium initiates destruction of metals.One such hydrates - hexahydrate, which is a needle-shaped crystals which melted at 106 ° C.In the reaction of magnesium chloride to form ammonium salt-bitter taste diamond-shaped crystals, readily soluble in aqueous solutions and alcohols.
Compound magnesium chloride because of its properties abundant forms base salts which have a protective effect.The relative stability of these salts in a temperature range causes their wide use, but it also creates enough problems associated with environmental pollution.In particular, potassium salts of magnesium chloride used in the destruction of ice accumulation on the roads in winter.The effect of this application is very doubtful, since this is a threat of contaminated water and causes damage in the form of corrosion.
for electrolytic production of magnesium metal in the form of magnesium chloride is also used, the preparation of this compound by means of this technology can be found for medical purposes.
The nature of the substance, in addition to the already mentioned sea water, occurs in the form of carnallite.The most important sources of this mineral are located in Solikamsk.The most common area where the magnesium chloride is used, it is engineering, which is a substance used to enhance the process of melting snow.In the food industry, this compound is known under the name of a food additive E511.This additive is as a food ingredient commonly used residents of Japan.They call it "Nigar" - a bitter juice.Get Nigar naturally from sea water by evaporation.This product contains a variety of useful elements - iron, sodium, potassium, zinc and others.Nigar is used mainly as a means of curdling soy milk, and for the preparation of the Japanese national dish of tofu.
