256536
Phosphorus tribromide
99%
Synonym(s):
Phosphorus(III) bromide
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About This Item
Linear Formula:
PBr3
CAS Number:
Molecular Weight:
270.69
EC Number:
MDL number:
UNSPSC Code:
12352101
PubChem Substance ID:
NACRES:
NA.22
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vapor pressure
0.27 psi ( 54 °C)
Quality Level
Assay
99%
form
liquid
refractive index
n20/D 1.697 (lit.)
bp
175 °C (lit.)
mp
−41.5 °C (lit.)
density
2.88 g/mL at 20 °C (lit.)
SMILES string
BrP(Br)Br
InChI
1S/Br3P/c1-4(2)3
InChI key
IPNPIHIZVLFAFP-UHFFFAOYSA-N
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General description
Phosphorus tribromide (PBr3) is commonly used in Hell-Volhard-Zelinsky halogenation for the α-bromination of carboxylic acids to form the corresponding acyl bromide. It is also useful for the conversion of primary and secondary alcohols to alkyl bromides.
Application
Phosphorus tribromide may be used as a reagent:
- In a novel protocol for synthesizing 7-ethoxy-1-(p-ethylphenoxy)-3,7-dimethyl-2-octene, a synthetic juvenile hormone mimic of trans,trans,cis-10,11-epoxy-7-ethyl-3,11-dimethyltrideca-2,6-dienoate.
- To synthesize 1,2,3-diazaphosphinane, 1,2,3-thiazaphosphinine and 1,2-azaphosphole bearing a chromone ring.
- To synthesize 1-Bromoundec-1-ene from 10-undecen-1-ol.
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Eye Dam. 1 - Skin Corr. 1B - STOT SE 3
Target Organs
Respiratory system
Supplementary Hazards
Storage Class Code
8A - Combustible corrosive hazardous materials
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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