Aluminium bromide

Aluminium bromide
Names
	Preferred IUPAC name Aluminium bromide
	Other names Aluminic bromide; Aluminium(III) bromide; Aluminium tribromide
Identifiers
CAS Number	7727-15-3 ; 7784-11-4 hexahydrate ;
3D model (JSmol)	monomer: Interactive image; dimer: Interactive image; hexahydrate: Interactive image;
ChemSpider	22818 ; 9040513 hemi(acetyl bromide) ; 9499890 ethanethiol ;
ECHA InfoCard	100.028.891
EC Number	231-779-7;
PubChem CID	24409; 11062022 tertikis(tetrachloromethane); 10865226 hemi(acetyl bromide); 11324936 ethanethiol; 6093832 tris(pyridine);
RTECS number	BD0350000;
UNII	IY20HBK5LK ;
UN number	1725
CompTox Dashboard (EPA)	DTXSID2064783 ;
	InChI InChI=1S/Al.3BrH/h;31H/q+3;;;/p-3 Key: PQLAYKMGZDUDLQ-UHFFFAOYSA-K ; InChI=1/Al.3BrH/h;31H/q+3;;;/p-3 Key: PQLAYKMGZDUDLQ-DFZHHIFOAT;
	SMILES monomer: Br[Al](Br)Br; dimer: Br[Al-]1(Br)[Br+][Al-]([Br+]1)(Br)Br; hexahydrate: [OH2+][Al-3]([OH2+])([OH2+])([OH2+])([OH2+])[OH2+].[Br-].[Br-].[Br-];
Properties
Chemical formula	AlBr3; Al2Br6; AlBr3·6H2O (hexahydrate)
Molar mass	266.694 g/mol (anhydrous); 374.785 g/mol (hexahydrate)
Appearance	white to pale yellow powder
Odor	pungent
Density	3.2 g/cm3 (anhydrous); 2.54 g/cm3 (hexahydrate)
Melting point	97.5 °C (anhydrous); 93 °C (hexahydrate)
Boiling point	255 °C (anhydrous)
Solubility in water	very soluble, partially hydrolyses indicated by a fuming solution and an optional appearance of white precipitate
Solubility	slightly soluble in methanol, diethyl ether, acetone
Structure
Crystal structure	Monoclinic, mP16 (anhydrous)
Space group	P21/c, No. 14
Lattice constant	a = 0.7512 nm, b = 0.7091 nm, c = 1.0289 nm α = 90°, β = 96.44°, γ = 90°
Formula units (Z)	4
Thermochemistry
Heat capacity (C)	100.6 J/(mol·K)
Std molar; entropy (S⦵298)	180.2 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−572.5 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314
Precautionary statements	P260, P264, P270, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P405, P501
NFPA 704 (fire diamond)	3 1 1
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1598 mg/kg (oral, rat)
Related compounds
Other anions	aluminium trichloride; aluminium triiodide
Other cations	boron tribromide
Related compounds	iron(III) 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

Aluminium bromide is any chemical compound with the empirical formula AlBr_x. Aluminium tribromide is the most common form of aluminium bromide. It is a colorless, sublimable hygroscopic solid; hence old samples tend to be hydrated, mostly as aluminium tribromide hexahydrate (AlBr₃·6H₂O).

Names


Preferred IUPAC name Aluminium bromide
Other names Aluminic bromide Aluminium(III) bromide Aluminium tribromide
Identifiers
CAS Number	7727-15-3^Y 7784-11-4 hexahydrate^Y
3D model (JSmol)	monomer: Interactive image dimer: Interactive image hexahydrate: Interactive image
ChemSpider	22818^Y 9040513 hemi(acetyl bromide)^Y 9499890 ethanethiol^Y
ECHA InfoCard	100.028.891
EC Number	231-779-7
PubChem CID	24409 11062022 tertikis(tetrachloromethane) 10865226 hemi(acetyl bromide) 11324936 ethanethiol 6093832 tris(pyridine)
RTECS number	BD0350000
UNII	IY20HBK5LK^Y
UN number	1725
CompTox Dashboard (EPA)	DTXSID2064783
InChI InChI=1S/Al.3BrH/h;31H/q+3;;;/p-3^Y Key: PQLAYKMGZDUDLQ-UHFFFAOYSA-K^Y InChI=1/Al.3BrH/h;31H/q+3;;;/p-3 Key: PQLAYKMGZDUDLQ-DFZHHIFOAT
SMILES monomer: Br[Al](Br)Br dimer: Br[Al-]1(Br)[Br+][Al-]([Br+]1)(Br)Br hexahydrate: [OH2+][Al-3]([OH2+])([OH2+])([OH2+])([OH2+])[OH2+].[Br-].[Br-].[Br-]
Properties
Chemical formula	AlBr₃ Al₂Br₆ AlBr₃·6H₂O (hexahydrate)
Molar mass	266.694 g/mol (anhydrous) 374.785 g/mol (hexahydrate)
Appearance	white to pale yellow powder
Odor	pungent
Density	3.2 g/cm³ (anhydrous) 2.54 g/cm³ (hexahydrate)
Melting point	97.5 °C (anhydrous) 93 °C (hexahydrate)
Boiling point	255 °C (anhydrous)
Solubility in water	very soluble, partially hydrolyses indicated by a fuming solution and an optional appearance of white precipitate
Solubility	slightly soluble in methanol, diethyl ether, acetone
Structure
Crystal structure	Monoclinic, mP16 (anhydrous)
Space group	P2₁/c, No. 14
Lattice constant	a = 0.7512 nm, b = 0.7091 nm, c = 1.0289 nm α = 90°, β = 96.44°, γ = 90°
Formula units (Z)	4
Thermochemistry
Heat capacity (C)	100.6 J/(mol·K)
Std molar entropy (S^⦵₂₉₈)	180.2 J/(mol·K)
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−572.5 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314
Precautionary statements	P260, P264, P270, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P405, P501
NFPA 704 (fire diamond)	3 1 1
Lethal dose or concentration (LD, LC):
LD₅₀ (median dose)	1598 mg/kg (oral, rat)
Related compounds
Other anions	aluminium trichloride aluminium triiodide
Other cations	boron tribromide
Related compounds	iron(III) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references