3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||174.894 g.mol−1|
|Appearance||Pale yellow liquid|
|Melting point||−61.30 °C (−78.34 °F; 211.85 K)|
|Boiling point||40.25 °C (104.45 °F; 313.40 K)|
|Reacts with water|
|Main hazards||Reacts violently with water, powerful oxidizer|
|Safety data sheet||See: data page|
|GHS Signal word||Danger|
|H271, H305, H314, H330, H370, H371, H373|
|P210, P220, P221, P260, P264, P270, P271, P280, P283, P284, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P306+P360, P307+P311, P309+P311, P310, P314, P320, P321, P331, P363, P370+P378, P371+P380+P375, P403+P233, P405, P501|
|NFPA 704 (fire diamond)|
|NIOSH (US health exposure limits):|
|TWA 0.1 ppm (0.7 mg/m3)|
IDLH (Immediate danger)
|Supplementary data page|
|Refractive index (n),|
Dielectric constant (εr), etc.
|UV, IR, NMR, MS|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|(what is ?)|
BrF5 finds use in oxygen isotope analysis. Laser ablation of solid silicates in the presence of bromine pentafluoride releases O2 for subsequent analysis. It has also been tested as an oxidizer in liquid rocket propellants and is used as a fluorinating agent in the processing of uranium.
Bromine pentafluoride was first prepared in 1931 by the direct reaction of bromine with fluorine. This reaction is suitable for the preparation of large quantities, and is carried out at temperatures over 150 °C (302 °F) with an excess of fluorine:
This route yields bromine pentafluoride almost completely free of trifluorides and other impurities.
It is an extremely effective fluorinating agent, being able to convert most uranium compounds to uranium hexafluoride at room temperature.
Bromine pentafluoride is severely corrosive to the skin, and its vapors are irritating to the eyes, skin, and mucous membranes. In moist air, it will in fact release "smoke" containing hydrofluoric acid vapors coming from its reaction with the water in the air. Additionally, exposure to 100 ppm or more for more than one minute is lethal to most experimental animals. Chronic exposure may cause kidney damage and liver failure.
It may spontaneously ignite or explode upon contact with organic materials or metal dust.