• CAS No.：
  1393330-38-5
• Synonyms：
  Br-PEG4-Acid
  Bromo-PEG4-acid
  
• Purity：
  ≥95%
• MF：
  C₁₁H₂₁BrO₆
• MW：
  329.185
• Recommended Storage Condition：
  Store at -5°C,keep in dry and avoid sunlight.
• Uses：
  Applicated in medical research, drug-release, nanotechnology and new materials research, cell culture. In the study of ligand, polypeptide synthesis support, a graft polymer compounds, new materials, and polyethylene glycol-modified functional coatings and other aspects of the active compound.

Br-PEG4-COOH (Bromo-PEG4-acid) is a versatile PEG linker featuring a bromide group and a terminal carboxylic acid group. The hydrophilic PEG spacer enhances solubility in aqueous solutions, making it ideal for various bioconjugation applications. The bromide group serves as an excellent leaving group for nucleophilic substitution reactions, while the terminal carboxylic acid can react with primary amines in the presence of coupling reagents (such as EDC or HATU) to form stable amide bonds.

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