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Sigma-Aldrich

Magnesium chloride hexahydrate

99.999% (trace metals basis)

Synonym(s):

Magnesium dichloride hexahydrate

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About This Item

Linear Formula:
MgCl2 · 6H2O
CAS Number:
Molecular Weight:
203.30
MDL number:
UNSPSC Code:
12352302
NACRES:
NA.21

Quality Level

assay

99.999% (trace metals basis)

form

crystalline

mp

117 °C

solubility

H2O: soluble (highly soluble)
acetone: slightly soluble
alcohols: slightly soluble

SMILES string

O.O.O.O.O.O.Cl[Mg]Cl

InChI

1S/2ClH.Mg.6H2O/h2*1H;;6*1H2/q;;+2;;;;;;/p-2

InChI key

DHRRIBDTHFBPNG-UHFFFAOYSA-L

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General description

Magnesium chloride hexahydrate is a colorless to white, crystalline salt. The salt is soluble in water and slightly soluble in ethanol, acetone, and pyridine. The hydrate loses water when heated to higher temperatures, but thermal dehydration to the anhydrous salt is not straightforward. Chemically, magnesium chloride is a weak Lewis acid. One of the most common and simplest routes to producing magnesium chloride is extraction from naturally occurring brine, for example by solar evaporation of sea water, which can be purified by solution chemistries.

Application

One major application of high-purity magnesium chloride is in the synthesis of layered double hydroxides (LDH), which are high-surface area ionic clays. LDHs are studied for water filtration, among other applications, and usually consist of magnesium and aluminum ions because of the low toxicity of these metal cations. LDHs are synthesized from chloride salts using co-precipitation reactions, ion-exchange processes, and urea methods. Another application of high-purity magnesium chloride is as a reagent to dope or substitute magnesium ions into solid-state materials and nanoparticles. For example, Mg-doping in ZnO has shown to modulate its band structure and Mg-doping in lithium nickel cobalt manganese oxide helps suppress cation mixing and enables longer cycle lifetimes for its use as a cathode material.

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Effect of Mg doping on the structural and electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode materials
Huang, Z., Wang, Z., et al.
Electrochimica Acta, 795-802, 182-182 (2015)
Preparation of Molybdenum Disulfide Coated Mg/Al Layered Double Hydroxide Composites for Efficient Removal of Chromium(VI)
Wang, J., Want, P., et al.
ACS sustainable chemistry & engineering, 5, 7165?7174-7165?7174 (2017)
A New Approach for Removing Anionic Organic Dyes from Wastewater Based on Electrostatically Driven Assembly
Sansuk, S., Srijaranai, S., et al.
Environmental Science & Technology, 50, 6477?6484-6477?6484 (2016)
Band gap engineering and enhanced photoluminescence of Mg doped ZnO nanoparticles synthesized by wet chemical route
Arshad, M., Ansari, M.M., et al.
Journal of Luminescence, 161, 275-280 (2015)

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