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Magnesium Chloride

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Magnesium Chloride (Wikipedia)
Magnesium chloride
Magnesium chloride.jpg
Names
Other names
Magnesium dichloride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.176
E number E511 (acidity regulators, ...)
9305
RTECS number OM2975000
Properties
MgCl2
Molar mass 95.211 g/mol (anhydrous)
203.31 g/mol (hexahydrate)
Appearance white or colourless crystalline solid
Density 2.32 g/cm3 (anhydrous)
1.569 g/cm3 (hexahydrate)
Melting point 714 °C (1,317 °F; 987 K) 117 °C (243 °F; 390 K) (hexahydrate)
on rapid heating: slow heating leads to decomposition from 300 °C (572 °F; 573 K)
Boiling point 1,412 °C (2,574 °F; 1,685 K)
anhydrous 52.9 g/100 mL (0 °C)

54.3 g/100 mL (20 °C)
72.6 g/100 mL (100 °C)
hexahydrate
167 g/100 mL (20 °C)
Solubility slightly soluble in acetone, pyridine
Solubility in ethanol 7.4 g/100 mL (30 °C)
−47.4·10−6 cm3/mol
1.675 (anhydrous)
1.569 (hexahydrate)
Structure
CdCl2
(octahedral, 6-coordinate)
Thermochemistry
71.09 J/mol K
89.88 J/mol K
-641.1 kJ/mol
-591.6 kJ/mol
Pharmacology
A12CC01 (WHO) B05XA11 (WHO)
Hazards
Main hazards Irritant
Safety data sheet ICSC 0764
R-phrases (outdated) R36, R37, R38
S-phrases (outdated) S26, S37, S39
NFPA 704
Flammability code 0: Will not burn. E.g., waterHealth code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentineReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
2800 mg/kg (oral, rat)
Related compounds
Other anions
Magnesium fluoride
Magnesium bromide
Magnesium iodide
Other cations
Beryllium chloride
Calcium chloride
Strontium chloride
Barium chloride
Radium chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. These salts are typical ionic halides, being highly soluble in water. The hydrated magnesium chloride can be extracted from brine or sea water. In North America, magnesium chloride is produced primarily from Great Salt Lake brine. It is extracted in a similar process from the Dead Sea in the Jordan valley. Magnesium chloride, as the natural mineral bischofite, is also extracted (via solution mining) out of ancient seabeds; for example, the Zechstein seabed in northwest Europe. Some magnesium chloride is made from solar evaporation of seawater. Anhydrous magnesium chloride is the principal precursor to magnesium metal, which is produced on a large scale. Hydrated magnesium chloride is the form most readily available.

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