Beryllium bromide

Summary

Beryllium bromide
Beryllium bromide.svg
Names
IUPAC name
Beryllium bromide
Identifiers
  • 7787-46-4 checkY[ECHA]
3D model (JSmol)
  • Interactive image
ChemSpider
  • 74208 checkY
ECHA InfoCard 100.029.196 Edit this at Wikidata
EC Number
  • 232-115-9
  • 82230
UNII
  • T00751H2J8
  • DTXSID80999064 Edit this at Wikidata
  • InChI=1S/Be.2BrH/h;2*1H/q+2;;/p-2 checkY
    Key: PBKYCFJFZMEFRS-UHFFFAOYSA-L checkY
  • InChI=1/Be.2BrH/h;2*1H/q+2;;/p-2
    Key: PBKYCFJFZMEFRS-NUQVWONBAJ
  • 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
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)[1]
Highly[1]
Solubility soluble in ethanol, diethyl ether, pyridine
insoluble in benzene
Structure
Orthorhombic
Thermochemistry
0.4111 J/g K
9.5395 J/K
-2.094 kJ/g
Hazards
Main hazards see Berylliosis
GHS pictograms GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
GHS Signal word 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)
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)[2]
REL (Recommended)
Ca C 0.0005 mg/m3 (as Be)[2]
IDLH (Immediate danger)
Ca [4 mg/m3 (as Be)][2]
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).
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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

  1. ^ 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
  2. ^ a b c 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.