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Magnesium Chloride
Magnesium Chloride

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Magnesium Chloride
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Magnesium Chloride
High Quality
Earliest Shipment
Competitive Price
Professional Service



Magnesium chloride is the name for the chemical compounds with the formulas 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. Magnesium chloride as the natural mineral bischofite is also extracted (solution mining) out of ancient seabeds; for example, the Zechstein seabed in northwest Europe. Anhydrous magnesium chloride is the principal precursor to magnesium metal, which is produced on a large scale. Hydrated magnesium chloride is the form usually used in prescription oral magnesium supplements.



Magnesium chlorideIdentifiersPropertiesStructureHazardsRelated compounds
IUPAC name[hide]Magnesium chloride
Other names[hide]Magnesium dichloride
CAS number7786-30-3 Y, 
7791-18-6 (hexahydrate)
ChemSpider22987 Y
RTECS numberOM2975000
Jmol-3D imagesImage 1
[show]InChI=1S/2ClH.Mg/h2*1H;/q;;+2/p-2 Y
Molecular formulaMgCl2
Molar mass95.211 g/mol (anhydrous)
203.31 g/mol (hexahydrate)
Appearancewhite or colourless crystalline solid
Density2.32 g/cm3 (anhydrous)
1.569 g/cm3 (hexahydrate)
Melting point

714 °C (987 K) (on rapid heating: slow heating leads to decomposition from 300 °C)

Boiling point

1412 °C (1685 K)

Solubility in wateranhydrous
54.3 g/100 ml (20 °C)
72.6 g/100 mL (100 °C) hexahydrate
157 g/100 mL (20 °C)
Solubility in ethanol7.4 g/100 mL (30 °C)
Refractive index (nD)1.675 (anhydrous)
1.569 (hexahydrate)
Crystal structureCdCl2
(octahedral, 6-coordinate)
EU IndexNot listed
R-phrasesR36, R37, R38
S-phrasesS26, S37, S39
Main hazardsIrritant
Flash pointNon-flammable
LD502800 mg/kg-1 (oral, rat)
Other anionsMagnesium fluoride
Magnesium bromide
Magnesium iodide
Other cationsBeryllium chloride
Calcium chloride
Strontium chloride
Barium chloride

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