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 (So298)	9.5395 J/K
Std enthalpy of; formation (ΔfH⦵298)	-2.094 kJ/g
Hazards
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).
	(what is ?)
	Infobox references

Beryllium bromide is the chemical compound with the formula BeBr₂. It is very hygroscopic and dissolves well in water. The compound is a polymer with tetrahedral Be centres.^[3]

Preparation and reactions[]

It can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500 °C to 700 °C:^[1]

Be + Br₂ → BeBr₂

Beryllium bromide is also formed when treating beryllium oxide with hydrobromic acid:

BeO + 2 HBr → BeBr₂ + H₂O

It hydrolyzes slowly in water: BeBr₂ + 2 H₂O → 2 HBr + Be(OH)₂

Safety[]

Beryllium compounds are toxic if inhaled or ingested.

References[]

^ ^a ^b ^c Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, pp. 61–62, ISBN 0-8493-8671-3, retrieved 2007-12-10
^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
^ Crystal modifications of Beryllium dihalides BeCl2, BeBr2, and BeI2 Troyanov, S. I. Zhurnal Neorganicheskoi Khimii (2000), 45(10), 1619-1624.

‹ The template below (Bromides) is being considered for merging. See templates for discussion to help reach a consensus. ›

[hand-1] Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, pp. 61–62, ISBN 0-8493-8671-3, retrieved 2007-12-10

[PGCH-2] NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).

[3] Crystal modifications of Beryllium dihalides BeCl2, BeBr2, and BeI2 Troyanov, S. I. Zhurnal Neorganicheskoi Khimii (2000), 45(10), 1619-1624.

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