Magnesium bromide

Magnesium bromide
Identifiers
CAS Number	7789-48-2 (anhydrous) ; 13446-53-2 (hexahydrate) ; 75198-45-7 (decahydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	74219 ;
ECHA InfoCard	100.029.246
PubChem CID	522691;
UNII	2VC6P60SLN ;
CompTox Dashboard (EPA)	DTXSID7064865 ;
	InChI InChI=1S/2BrH.Mg/h21H;/q;;+2/p-2 Key: OTCKOJUMXQWKQG-UHFFFAOYSA-L ; InChI=1/2BrH.Mg/h21H;/q;;+2/p-2 Key: OTCKOJUMXQWKQG-NUQVWONBAY;
	SMILES [Mg+2].[Br-].[Br-];
Properties
Chemical formula	MgBr2 (anhydrous); MgBr2·6H2O (hexahydrate);
Molar mass	184.113 g/mol (anhydrous); 292.204 g/mol (hexahydrate)
Appearance	white hygroscopic hexagonal crystals (anhydrous); colorless monoclinic crystals (hexahydrate)
Density	3.72 g/cm3 (anhydrous); 2.07 g/cm3 (hexahydrate)
Melting point	711 °C (1,312 °F; 984 K) 172.4 °C, decomposes (hexahydrate)
Boiling point	1,250 °C (2,280 °F; 1,520 K)
Solubility in water	102 g/(100 mL) (anhydrous); 316 g/(100 mL) (0 °C, hexahydrate)
Solubility	ethanol: 6.9 g/(100 mL); methanol: 21.8 g/(100 mL)
Magnetic susceptibility (χ)	−72.0·10−6 cm3/mol
Structure
Crystal structure	Rhombohedral, hP3
Space group	P-3m1, No. 164
Coordination geometry	octahedral
Thermochemistry
Heat capacity (C)	70 J/(mol·K)
Std molar; entropy (S⦵298)	117.2 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−524.3 kJ/mol
Hazards
NFPA 704 (fire diamond)	1 0 0
Safety data sheet (SDS)	External SDS
Related compounds
Other anions	Magnesium fluoride; Magnesium chloride; Magnesium iodide;
Other cations	Beryllium bromide; Calcium bromide; Strontium bromide; Barium bromide; Radium bromide;
	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 bromide are inorganic compounds with the chemical formula MgBr₂(H₂O)_x, where x can range from 0 to 9. They are all white deliquescent solids. Some magnesium bromides have been found naturally as rare minerals such as: bischofite and carnallite.

Identifiers


CAS Number	7789-48-2 (anhydrous)^Y 13446-53-2 (hexahydrate)^N 75198-45-7 (decahydrate)^N
3D model (JSmol)	Interactive image
ChemSpider	74219^Y
ECHA InfoCard	100.029.246
PubChem CID	522691
UNII	2VC6P60SLN^Y
CompTox Dashboard (EPA)	DTXSID7064865
InChI InChI=1S/2BrH.Mg/h21H;/q;;+2/p-2^Y Key: OTCKOJUMXQWKQG-UHFFFAOYSA-L^Y InChI=1/2BrH.Mg/h21H;/q;;+2/p-2 Key: OTCKOJUMXQWKQG-NUQVWONBAY
SMILES [Mg+2].[Br-].[Br-]
Properties
Chemical formula	MgBr₂ (anhydrous) MgBr₂·6H₂O (hexahydrate)
Molar mass	184.113 g/mol (anhydrous) 292.204 g/mol (hexahydrate)
Appearance	white hygroscopic hexagonal crystals (anhydrous) colorless monoclinic crystals (hexahydrate)
Density	3.72 g/cm³ (anhydrous) 2.07 g/cm³ (hexahydrate)
Melting point	711 °C (1,312 °F; 984 K) 172.4 °C, decomposes (hexahydrate)
Boiling point	1,250 °C (2,280 °F; 1,520 K)
Solubility in water	102 g/(100 mL) (anhydrous) 316 g/(100 mL) (0 °C, hexahydrate)
Solubility	ethanol: 6.9 g/(100 mL) methanol: 21.8 g/(100 mL)
Magnetic susceptibility (χ)	−72.0·10⁻⁶ cm³/mol
Structure
Crystal structure	Rhombohedral, hP3
Space group	P-3m1, No. 164
Coordination geometry	octahedral
Thermochemistry
Heat capacity (C)	70 J/(mol·K)
Std molar entropy (S^⦵₂₉₈)	117.2 J/(mol·K)
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−524.3 kJ/mol
Hazards
NFPA 704 (fire diamond)	1 0 0
Safety data sheet (SDS)	External SDS
Related compounds
Other anions	Magnesium fluoride Magnesium chloride Magnesium iodide
Other cations	Beryllium bromide Calcium bromide Strontium bromide Barium bromide Radium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references