Hydrobromic 33 In Acetic Acid

Hydrobromic 33 In Acetic Acid

CAS Number: 37348‑16‑6

Synonyms: Hydrobromic acid 33 wt % in glacial acetic acid; Hydrogen bromide in acetic acid

Chemical Formula:C₂H₅O₂Br (HBr·AcOH)

Molecular Weight:~140.96 g/mol

Product Introduction

A clear to slight yellow fuming liquid containing ~33 % HBr in glacial acetic acid. Strongly acidic and anhydrous, it's used as a reagent and catalyst for bromination, demethylation, esterification, and dehydration in organic synthesis.

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Physical & Chemical Properties

Property Value
Appearance Clear to light-yellow fuming liquid
Assay / HBr Content 31.5–34.5 wt %
Water Content ≤ 1 %
Density @ 20 °C ~1.40 g/mL
Boiling Point ~28.9 °C (HBr·AcOH boiling point)
Flash Point ≈ 65 °C
Solubility Miscible with water, alcohols, and organic solvents
Vapor Pressure Not specified (fuming)
pH (neat) Very strongly acidic

Applications

  • Brominating reagent: Effective for aromatic brominations and demethylation of methoxy groups.
  • Catalyst:Used in hydration, dehydration, esterification, and isomerization reactions.
  • Pharma/intermediates:For production of brominated intermediates and pesticides.

Safety Note:

  • Corrosive and fuming; emits HBr vapors. Use in a well-ventilated fume hood with PPE.

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