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930970

Sigma-Aldrich

Magnesium chloride hexahydrate

99.9% trace metals basis

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Synonym(s):
Magnesium dichloride hexahydrate
Linear Formula:
MgCl2 · 6H2O
CAS Number:
7791-18-6
Molecular Weight:
203.30
MDL number:
MFCD00149781
UNSPSC Code:
12352302
NACRES:
NA.21

Quality Level

100

Assay

99.9% trace metals basis

form

powder, crystals or chunks

mp

117 °C

solubility

acetone: slightly soluble
alcohols: slightly soluble
water: soluble (highly 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 salt. The salt is soluble in water and slightly soluble in ethanol, acetone, and pyridine. Chemically, magnesium chloride is a weak Lewis acid.
Magnesium chloride is extracted from naturally occurring brine, for example by solar evaporation of sea water, and purified by solution chemistries.

Application

Magnesium chloride is used as a source of the divalent magnesium ion, often to control zeta potential and ionic strength. Commonly, magnesium chloride is used in water desalination experiments, particularly research investigating nanofiltration membranes. In addition, researchers have used magnesium chloride to alter the stability of colloidal suspensions, for example driving the coagulation of graphene oxide. Magnesium chloride has also been used to control the interlayer spacing of graphene-oxide membranes

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Ion sieving in graphene oxide membranes via cationic control of interlayer spacing.
Chen, L., et al.
Bio/technology (Nature Publishing Company), 550, 380?383-380?383 (2017)
Aggregation and Stability of Reduced Graphene Oxide: Complex Roles of Divalent Cations, pH, and Natural Organic Matter
Chowdhury, I., et al.
Environmental Science & Technology, 49, 10886-10893 (2015)

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