Arsenic tribromide

Arsenic tribromide is an inorganic compound with the formula AsBr3, it is a bromide of arsenic. Arsenic is a chemical element that has the symbol As and atomic number 33. This pyramidal molecule is the only known binary arsenic bromide. AsBr3 is noteworthy for its very high refractive index of approximately 2.3. It also has a very high diamagnetic susceptibility. The compound exists as colourless deliquescent crystals that fume in moist air.

Arsenic tribromide
Names
Preferred IUPAC name
Arsenic tribromide
Systematic IUPAC name
Tribromoarsane
Other names
Arsenic(III) bromide
Arsenous bromide, Arsenicum Bromatum, Tribromoarsine
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.143
EC Number
  • 232-057-4
PubChem CID
RTECS number
  • CG1375000
UNII
  • InChI=1S/AsBr3/c2-1(3)4 Y
    Key: JMBNQWNFNACVCB-UHFFFAOYSA-N Y
  • InChI=1S/AsBr3/c2-1(3)4
    Key: JMBNQWNFNACVCB-UHFFFAOYSA-N
  • InChI=1/AsBr3/c2-1(3)4
    Key: JMBNQWNFNACVCB-UHFFFAOYAH
SMILES
  • Br[As](Br)Br
Properties
AsBr3
Molar mass 314.634 g/mol
Appearance white to pale yellow crystalline solid
Density 3.54 g/cm3
Melting point 31.1 °C (88.0 °F; 304.2 K)
Boiling point 221 °C (430 °F; 494 K)
soluble, partial hydrolysis indicated by fumes
Magnetic susceptibility (χ)
 -106.0·10−6 cm3/mol
Refractive index (nD)
 2.3
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
 [1910.1018] TWA 0.010 mg/m3
REL (Recommended)
 Ca C 0.002 mg/m3 [15-minute]
IDLH (Immediate danger)
 Ca [5 mg/m3 (as As)]
Related compounds
Related compounds
 Phosphorus tribromide
arsenic trichloride
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
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