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​1-Acetoxy Ethyl Bromide (1-AEB)

1-Acetoxy Ethyl Bromide, also called 1-bromoethyl acetate or 1-(acetoxy)ethyl bromide, is an organic brominated ester used mainly as a chemical intermediate in pharmaceutical and fine-chemical synthesis.

Basic information

  • IUPAC name: 1-bromoethyl acetate

  • Molecular formula: C₄H₇BrO₂

  • Molecular weight: ~167 g/mol

  • CAS number: 40258-78-4

  • SMILES: CC(OC(=O)C)Br

Structure

Its structure can be written as:

CH3−CH(Br)−OCOCH3CH_3-CH(Br)-OCOCH_3CH3​−CH(Br)−OCOCH3​

It contains:

  • a bromoethyl group

  • an acetate ester

Properties

Reported properties include:

  • Boiling point: about 122–125 °C

  • Density: about 1.48 g/cm³

  • Usually a colorless to brownish liquid/oil

  • Moisture sensitive (hygroscopic)

Uses

It is commonly used as:

  • an alkylating/intermediate reagent

  • a precursor in pharmaceutical synthesis

  • a building block in specialty organic chemistry

© 2026 by Shree Shyam Pharma Chem

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