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Phosphorus tribromide

Phosphorus tribromide
Phosphorus tribromide structure
CAS No.
7789-60-8
Chemical Name:
Phosphorus tribromide
Synonyms
PBr3;extrema[qr];tribroMophosphane;tribromophosphine;Phosphortribromid;phosphrous broMide;phosphorousbromide;PHOSPHORUS BROMIDE;Phosphorous bromide;Phosphorus tribroMid
CBNumber:
CB8372891
Molecular Formula:
Br3P
Formula Weight:
270.69
MOL File:
7789-60-8.mol

Phosphorus tribromide Properties

Melting point:
-40 °C
Boiling point:
175 °C(lit.)
Density 
2.88 g/mL at 20 °C(lit.)
vapor density 
9.3 (vs air)
vapor pressure 
0.27 psi ( 54 °C)
refractive index 
n20/D 1.697(lit.)
Flash point:
172.9°C
storage temp. 
-20°C
form 
Liquid
color 
Clear to slightly hazy colorless to yellow or light brown
Specific Gravity
2.88
Odor
Irritating odour
Water Solubility 
reacts
FreezingPoint 
-40℃
Sensitive 
Moisture Sensitive
Merck 
14,7357
BRN 
3903060
Stability:
Stable, but reacts violently with water. Incompatible with moisture, strong bases, strong oxidizing agents, reactive metals, acids, alcohols.
InChIKey
IPNPIHIZVLFAFP-UHFFFAOYSA-N
CAS DataBase Reference
7789-60-8(CAS DataBase Reference)
EWG's Food Scores
1
FDA UNII
58R3866PUA
NIST Chemistry Reference
Phosphorus tribromide(7789-60-8)
EPA Substance Registry System
Phosphorus tribromide (7789-60-8)
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS05,GHS07,GHS08
Signal word  Danger
Hazard statements  H314-H335-H336-H351-H373-H318
Precautionary statements  P260h-P301+P330+P331-P303+P361+P353-P405-P501a-P261-P280-P305+P351+P338-P310
Hazard Codes  C
Risk Statements  34-37-40-14-67
Safety Statements  26-45-36/37-36/37/39
RIDADR  UN 3264 8/PG 2
WGK Germany  2
RTECS  TH4460000
21
TSCA  Yes
HS Code  2812 90 00
HazardClass  8
PackingGroup  II
NFPA 704
0
3 2
W

Phosphorus tribromide price More Price(16)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 157783 Phosphorus tribromide 97% 7789-60-8 100g $64.2 2020-08-18 Buy
Sigma-Aldrich 157783 Phosphorus tribromide 97% 7789-60-8 500g $143 2020-08-18 Buy
TCI Chemical P1743 Phosphorus Tribromide >98.0%(T) 7789-60-8 300g $40 2020-06-24 Buy
Alfa Aesar 040191 Phosphorus(III) bromide, 99% (metals basis) 7789-60-8 25g $41.1 2020-06-24 Buy
Alfa Aesar 040191 Phosphorus(III) bromide, 99% (metals basis) 7789-60-8 100g $70.2 2020-06-24 Buy

Phosphorus tribromide Chemical Properties,Uses,Production

Chemical Properties

Phosphorus tribromide is a colourless liquid(possibly hazy)  with the formula PBr3. It fumes in air due to hydrolysis and has a penetrating odour. It is widely used in the laboratory for the conversion of alcohols toalkyl bromides.
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.

Uses

Phosphorus tribromide is used mainly for the conversion of alcohols to alkyl bromides and it is used in tests for skin corrosivity. It is used for alkene preparation and it act as a lewis base and a lewis acid. Phosphorus tribromide is used in the manufacture of pharmaceuticals such as alprazolam, methohexital and fenoprofen.
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.

Preparation

Phosphorus tribromide, PBr3, is most conveniently prepared by reaction between liquid bromine and a solution of white phosphorus in PBr3. In most of its reactions, the tribromide resembles the trichloride although the former has been much less studied and in some cases the products seem to be more complex.

Reactions

Silyl phosphites such as (EtO)2POSiMe3 and (Et3SiO)3P are known. The latter compound can be prepared in 30% yield by reacting phosphorus tribromide with an organosilane in the presence of zinc chloride. Esters of the former type can be made by reaction.
3Et3SiO+PBr3–-(Et3SiO)3+3RBr
Et3SiONa+(EtO)2PCl–-(EtO)2POSiEt3+NaCl)

General Description

A colorless fuming liquid with a pungent odor. Corrosive to metals and tissue. Boiling point 347°F (175°C). Freezing point -40°F (-40°C).

Air & Water Reactions

Fumes in air. Decomposed by water to form phosphoric acid and hydrobromic acid. Reaction with warm water is very rapid and may be violent [Mellor v.8. 1032 1940].

Reactivity Profile

Phosphorus tribromide reacts with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive; the reactions may be violent. Forms complexes with potassium or sodium metal that explode when shocked. Drop wise addition to 3-phenylpropanol caused an explosion when stirring of the mixture was discontinued [Chem. Brit., 1974, 10, 101-102].

Health Hazard

Inhalation causes severe irritation of nose, throat, and lungs. Ingestion causes burns of mouth and stomach. Contact with eyes or skin causes severe burns.

Safety Profile

Probably highly toxic. A corrosive irritant to the eyes, skin, and mucous membranes. Wdl react with water, steam, or acids to produce heat, toxic and corrosive fumes. Violent reaction or ignition with calcium hydroxide + sodium carbonate, phenylpropanol, sulfuric acid, oleum, fluorosulfuric acid, chlorosulfuric acid, 1,1,1 -tris(hydroxymethyl)methane, water, potassium, sodium, RuO4. When heated to decomposition it emits very toxic fumes of Brand POx. See also PHOSPHIDES and BROMIDES.

Purification Methods

It is decomposed by moisture, it should be kept dry and is corrosive. Purify it by distillation through an efficient fractionating column [see Whitmore & Lux J Am Chem Soc 54 3451] in a slow stream of dry N2, i.e. under strictly dry conditions. [Gay & Maxson Inorg Synth II 147 1946, Org Synth Col Vol II 358 1943.] Dissolve it in CCl4, dry it over CaCl2, filter and distil it. Store it in sealed ampoules under N2 and keep it away from light. HARMFUL VAPOURS.

Phosphorus tribromide Preparation Products And Raw materials

Raw materials

Preparation Products


Phosphorus tribromide Suppliers

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Huaian yishu technology co.,ltd
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View Lastest Price from Phosphorus tribromide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2020-08-13 Phosphorus tribromide
7789-60-8
US $200.00 / ASSAYS 10g 99.6% 10 MT Hebei Huanhao Biotechnology Co., Ltd.
2020-08-19 Phosphorus tribromidev
7789-60-8
US $12.00-10.00 / KG 1KG 99.8% 20tons Hebei Runbin Biotechnology Co. LTD
2020-05-20 Phosphorus tribromide
7789-60-8
US $1.00-1.00 / KG 1g 99% 50ton Shaanxi Dideu Medichem Co. Ltd

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