Magnesium chloride

Magnesium chloride
Names
	Other names Magnesium dichloride;
Identifiers
CAS Number	7786-30-3 ; 7791-18-6 (hexahydrate) ;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:6636 ;
ChEMBL	ChEMBL1200547 ;
ChemSpider	22987 ;
ECHA InfoCard	100.029.176
EC Number	232-094-6;
E number	E511 (acidity regulators, ...)
Gmelin Reference	9305
PubChem CID	24584;
RTECS number	OM2975000;
UNII	59XN63C8VM ; 02F3473H9O (hexahydrate) ;
CompTox Dashboard (EPA)	DTXSID5034690 ;
	InChI InChI=1S/2ClH.Mg/h21H;/q;;+2/p-2 Key: TWRXJAOTZQYOKJ-UHFFFAOYSA-L ; InChI=1S/2ClH.Mg/h21H;/q;;+2/p-2;
	SMILES Cl[Mg]Cl; [Mg+2].[Cl-].[Cl-];
Properties
Chemical formula	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) ; 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
	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). verify (what is ?) Infobox references

Magnesium chloride is an inorganic compound with the formula Mg Cl₂. 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.
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[1] "Summary of Classification and Labelling". echa.europa.eu.

[ullmann-2] Cite error: The named reference ullmann was invoked but never defined (see the help page).

[1]

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