Beryllium bromide

Beryllium bromide
Names
	IUPAC name Beryllium bromide
Identifiers
CAS Number	7787-46-4 [ECHA];
3D model (JSmol)	Interactive image;
ChemSpider	74208 ;
ECHA InfoCard	100.029.196
EC Number	232-115-9;
PubChem CID	82230;
UNII	T00751H2J8;
CompTox Dashboard (EPA)	DTXSID80999064 ;
	InChI InChI=1S/Be.2BrH/h;21H/q+2;;/p-2 Key: PBKYCFJFZMEFRS-UHFFFAOYSA-L ; InChI=1/Be.2BrH/h;21H/q+2;;/p-2 Key: PBKYCFJFZMEFRS-NUQVWONBAJ;
	SMILES Br[Be-2](Br)([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1(Br)Br;
Properties
Chemical formula	BeBr2
Molar mass	168.820 g/mol
Appearance	colorless white crystals
Density	3.465 g/cm3 (20 °C)
Melting point	508 °C (946 °F; 781 K)sublimes at 473 °C (883 °F; 746 K)
Boiling point	520 °C (968 °F; 793 K)
Solubility in water	Highly
Solubility	soluble in ethanol, diethyl ether, pyridine ; insoluble in benzene
Structure
Crystal structure	Orthorhombic
Thermochemistry
Heat capacity (C)	0.4111 J/g K
Std molar; entropy (S⦵298)	9.5395 J/K
Std enthalpy of; formation (ΔfH⦵298)	−2.094 kJ/g
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	see Berylliosis
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H315, H317, H319, H330, H335, H350i, H372, H411
Precautionary statements	P260, P301+P310, P304+P340, P305+P351+P338, P320, P330, P405, P501
NFPA 704 (fire diamond)	4 0 0
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.002 mg/m3; C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)
REL (Recommended)	Ca C 0.0005 mg/m3 (as Be)
IDLH (Immediate danger)	Ca [4 mg/m3 (as Be)]
Related compounds
Other anions	Beryllium fluoride; Beryllium chloride; Beryllium iodide
Other cations	Magnesium 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

Beryllium bromide is the chemical compound with the formula BeBr₂. It is very hygroscopic and dissolves well in water. The Be²⁺ cation, which is relevant to BeBr₂, is characterized by the highest known charge density (Z/r = 6.45), making it one of the hardest cations and a very strong Lewis acid.