• CAS No.：
  1257063-35-6
• Synonyms：
  Azide-PEG4-COOH；N3-PEG4-CH2CH2COOH
  15-Azido-4,7,10,13-tetraoxapentadecanoicacid
  N3-Peg(4)-cooh
  Azido-PEG4-acid
  1-Azido-3,6,9,12-tetraoxapentadecan-15-oicacid
  Azido-PEG4-propionic acid
  
• Purity：
  ≥95%
• MF：
  C₁₁H₂₁N₃O₆
• MW：
  291.301
• 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.

Monodisperse Azido-PEG4-acid (N3-PEG4-COOH) is a very popular PEG reagent containing an azide (N3) group with a terminal carboxylic acid (COOH). The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond.

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