714 °C (1,317 °F; 987 K) anhydrous 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)
Solubility in water
Anhydrous:
52.9 g/(100 mL) (0 °C)
54.3 g/(100 mL) (20 °C)
72.6 g/(100 mL) (100 °C)
Solubility
slightly soluble in acetone, pyridine
Solubility in ethanol
7.4 g/(100 mL) (30 °C)
Magnetic susceptibility (χ)
−47.4·10−6 cm3/mol
Refractive index (nD)
1.675 (anhydrous) 1.569 (hexahydrate)
Structure
Crystal structure
CdCl2
Coordination geometry
(octahedral, 6-coordinate)
Thermochemistry
Heat capacity (C)
71.09 J/(mol·K)
Std molar entropy (S⦵298)
89.88 J/(mol·K)
Std enthalpy of formation (ΔfH⦵298)
−641.1 kJ/mol
Gibbs free energy (ΔfG⦵)
−591.6 kJ/mol
Pharmacology
ATC code
A12CC01 (WHO) B05XA11 (WHO)
Hazards[1]
Occupational safety and health (OHS/OSH):
Main hazards
Irritant
GHS labelling:
Pictograms
Signal word
Warning
Hazard statements
H319, H335
NFPA 704 (fire diamond)
1
0
0
Flash point
Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)
2800 mg/kg (oral, rat)
Safety data sheet (SDS)
ICSC 0764
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
Chemical compound
Magnesium chloride is an inorganic compound with the formula MgCl2. It forms hydrates MgCl2·nH2O, where n can range from 1 to 12. These salts are colorless or white solids that are highly soluble in water. These compounds and their solutions, both of which occur in nature, have a variety of practical uses. 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.[2]
^"Summary of Classification and Labelling". echa.europa.eu.
^Cite error: The named reference ullmann was invoked but never defined (see the help page).
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