Phosphorus tribromide
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Phosphorus tribromide is a colourless liquid with the formula PBr3. The liquid fumes in moist air due to hydrolysis and has a penetrating odour. It is used in the laboratory for the conversion of alcohols to alkyl bromides.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Phosphorus tribromide | |
Other names
phosphorus(III) bromide, phosphorous bromide, tribromophosphine | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.029.253 |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
PBr3 | |
Molar mass | 270.69 g/mol |
Appearance | clear, colourless liquid |
Density | 2.852 g/cm3 |
Melting point | −41.5 °C (−42.7 °F; 231.7 K) |
Boiling point | 173.2 °C (343.8 °F; 446.3 K) |
rapid hydrolysis | |
Refractive index (nD) |
1.697 |
Viscosity | 0.001302 Pas |
Structure | |
trigonal pyramidal | |
Hazards | |
GHS labelling: | |
Danger | |
H314, H335 | |
P260, P261, P264, P271, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P363, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Related compounds | |
Other anions |
phosphorus trifluoride phosphorus trichloride phosphorus triiodide |
Other cations |
nitrogen tribromide arsenic tribromide antimony tribromide |
Related compounds |
phosphorus pentabromide phosphorus oxybromide |
Supplementary data page | |
Phosphorus tribromide (data page) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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