• CAS No.：
  1167575-20-3
• Synonyms：
  Azide-PEG36-COOH
  
• Purity：
  ≥95%
• MF：
  C₇₅H₁₄₉N₃O₃₈
• MW：
  1700.98
• 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.

N3-PEG36-COOH (CAS 1167575-20-3), also known as Azido-PEG36-acid, is a monodisperse, water-soluble PEG linker featuring a terminal azide group and a carboxylic acid group. The azide readily reacts with alkynes, BCN, and DBCO through click chemistry (CuAAC and SPAAC), while the carboxyl group enables efficient conjugation with primary amines using coupling reagents such as EDC or HATU to form stable amide bonds. The long PEG36 spacer enhances water solubility, reduces steric hindrance, and is well suited for bioconjugation, drug delivery, and surface functionalization.

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