Names | |
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IUPAC name
Beryllium bromide
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Identifiers | |
3D model (
JSmol)
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ChemSpider | |
ECHA InfoCard | 100.029.196 |
EC Number |
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PubChem
CID
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UNII | |
CompTox Dashboard (
EPA)
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Properties | |
Be Br2 | |
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) [1] |
Highly [1] | |
Solubility | soluble in
ethanol,
diethyl ether,
pyridine insoluble in benzene |
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: | |
Danger | |
H301, H315, H317, H319, H330, H335, H350i, H372, H411 | |
P260, P301+P310, P304+P340, P305+P351+P338, P320, P330, P405, P501 | |
NFPA 704 (fire diamond) | |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 0.002 mg/m3 C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be) [2] |
REL (Recommended)
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Ca C 0.0005 mg/m3 (as Be) [2] |
IDLH (Immediate danger)
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Ca [4 mg/m3 (as Be)] [2] |
Related compounds | |
Other
anions
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Beryllium fluoride Beryllium chloride Beryllium iodide |
Other
cations
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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).
|
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 coordinated Be centres. [3]
It can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500 °C to 700 °C: [1]
Beryllium bromide is also formed when treating beryllium oxide with hydrobromic acid:
It hydrolyzes slowly in water: BeBr2 + 2 H2O → 2 HBr + Be(OH)2
Two forms ( polymorphs) of BeBr2 are known. Both structures consist of tetrahedral Be2+ centers interconnected by doubly bridging bromide ligands. One form consist of edge-sharing polytetrahedra. The other form resembles zinc iodide with interconnected adamantane-like cages. [4]
Beryllium compounds are toxic if inhaled or ingested.