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39416-48-3

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Identification

Name
Pyridinium tribromide
CAS
39416-48-3
Synonyms
POLY(4-VINYLPYRIDINE HYDROBROMIDE PERBROMIDE)
PVPHP
PYRIDINE HYDROBROMIDE, COMPOUND WITH BROMIDE
pyridine hydrobromide compound with bromine
PYRIDINE HYDROBROMIDE PERBROMIDE
PYRIDINE HYDROBROMIDE PERBROMIDE POLYMER BOUND
PYRIDINE PERBROMIDE HYDROBROMIDE
PYRIDINIUM BROMIDE PERBROMIDE
PYRIDINIUM HYDROBROMIDE PERBROMIDE
PYRIDINIUM TRIBROMIDE
hydrogentribromide,compd.withpyridine(1:1)
Hydrogentribromide-pyridine-complex
PYRIDINIUM TRIBROMIDE, TECH., 90%
Pyridine Hydrobomide Perbromide
PyridiniumBrimidePerbromide
Pyridine hydrobromide perbromide, tech., 90+%
pyridine hydrobromide perbromide, tech.
PYRIDINIUMBROMIDEPERBROMIDE,TECHNICAL
Pyridinium perbromide
Poly(4-vinylpyridine hydrobromide perbromide), PVPHP, Pyridine hydrobromide perbromide polymer-bound
EINECS(EC#)
254-446-8
Molecular Formula
C5H6Br3N-2
MDL Number
MFCD00013223
Molecular Weight
319.82
MOL File
39416-48-3.mol

Chemical Properties

Appearance
red crystals
Melting point 
127-133 °C
mp 
127-133 °C
density 
2.9569 (rough estimate)
refractive index 
1.6800 (estimate)
storage temp. 
2-8°C
form 
Powder, Crystals and/or Chunks
color 
Red-orange to red to brown
Stability:
Stable. Incompatible with strong oxidizing agents, strong bases.
Water Solubility 
decomposes
Sensitive 
Lachrymatory
Merck 
14,7973
BRN 
3690144
InChIKey
YPCPFIMBGJOEKU-UHFFFAOYSA-O
CAS DataBase Reference
39416-48-3(CAS DataBase Reference)
EPA Substance Registry System
39416-48-3(EPA Substance)

Safety Data

Hazard Codes 
C,Xi
Risk Statements 
R37/38:Irritating to respiratory system and skin .
R34:Causes burns.
R36:Irritating to the eyes.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S24/25:Avoid contact with skin and eyes .
S27:Take off immediately all contaminated clothing .
RIDADR 
UN 3261 8/PG 2

WGK Germany 
3


3
Hazard Note 
Lachrymatory
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
29333100

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Hazard Information

Chemical Properties
red crystals
Uses
Pyridinium Tribromide is a reagent used in the α-thiocyanation of ketones and has also been applied to the synthesis of β-adrenergic blocking agents (also known as β-blockers) for patients with heart failure.
Uses
In small-scale brominations, where it is much more convenient and agreeable to measure and use than elemental bromine.
Purification Methods
It is a very good brominating agent-liberating one mol of Br2. Purify it by recrystallisation from glacial acetic acid (33g from 100mL of AcOH) to give orange-red crystals. [Fieser & Fieser Reagents for Organic Chemistry 1 967 1967, Englert & McElvain J Am Chem Soc 51 865 1929, Beilstein 20 II 103, 20/5 V 181.]

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