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Pyridinium tribromide

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Pyridinium tribromide Basic information
Pyridinium tribromide Chemical Properties
  • Melting point: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
  • Water Solubility decomposes
  • Sensitive Lachrymatory
  • Merck 14,7973
  • BRN 3690144
  • Stability:Stable. Incompatible with strong oxidizing agents, strong bases.
  • InChIKeyYPCPFIMBGJOEKU-UHFFFAOYSA-O
  • CAS DataBase Reference39416-48-3(CAS DataBase Reference)
  • EPA Substance Registry SystemPyridinium hydrogen tribromide (39416-48-3)
Safety Information
  • Hazard Codes C,Xi
  • Risk Statements 37/38-34-36
  • Safety Statements 26-36/37/39-45-24/25-27
  • RIDADR UN 3261 8/PG 2
  • WGK Germany 3
  • 3
  • Hazard Note Lachrymatory
  • TSCA Yes
  • HazardClass 8
  • PackingGroup III
  • HS Code 29333100
MSDS
Pyridinium tribromide Usage And Synthesis
  • Chemical Propertiesred crystals
  • UsesPyridinium 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.
  • UsesIn small-scale brominations, where it is much more convenient and agreeable to measure and use than elemental bromine.
  • Purification MethodsIt 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.]
Pyridinium tribromide Preparation Products And Raw materials
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