N-(Azido-PEG4)-N-bis(PEG4-acid)

• CAT Number: I015940
• CAS Number: 2093152-80-6
• Molecular Formula: C32H62N4O16
• Molecular Weight: 758.85
• Purity: ≥95%
• Synonyms: 3-[2-[2-[2-[2-[2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]ethyl-[2-[2-[2-[2-(2-carboxyethoxy)ethoxy]ethoxy]ethoxy]ethyl]amino]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid
• InChI: InChI=1S/C32H62N4O16/c33-35-34-3-9-43-15-21-49-27-30-52-24-18-46-12-6-36(4-10-44-16-22-50-28-25-47-19-13-41-7-1-31(37)38)5-11-45-17-23-51-29-26-48-20-14-42-8-2-32(39)40/h1-30H2,(H,37,38)(H,39,40)
• InChIKey: RJWVORJINOLNTQ-UHFFFAOYSA-N
• SMILES: C(COCCOCCOCCOCCN(CCOCCOCCOCCOCCC(=O)O)CCOCCOCCOCCOCCN=[N+]=[N-])C(=O)O

N-(Azido-PEG4)-N-bis(PEG4-acid)（Cat No.:I015940）is a multifunctional PEG derivative featuring an azide group on a PEG₄ spacer and two terminal carboxylic acids connected through PEG₄ chains. The azide moiety enables highly selective bioorthogonal conjugation via copper-catalyzed or strain-promoted click chemistry, while the carboxyl groups can be activated for coupling with amines or hydroxyls to form stable linkages. The PEG₄ spacers impart excellent solubility, flexibility, and biocompatibility while minimizing steric hindrance. This versatile reagent is widely applied in bioconjugation, dual-site crosslinking, nanoparticle functionalization, and drug delivery system development.