Azido-PEG5-NHS ester

• CAT Number: I015835
• CAS Number: 1433996-86-1
• Molecular Formula: C17H28N4O9
• Molecular Weight: 432.43
• Purity: ≥95%
• Synonyms: (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]propanoate
• InChI: InChI=1S/C17H28N4O9/c18-20-19-4-6-26-8-10-28-12-14-29-13-11-27-9-7-25-5-3-17(24)30-21-15(22)1-2-16(21)23/h1-14H2
• InChIKey: UBITXOFSGXNPBW-UHFFFAOYSA-N
• SMILES: C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCOCCN=[N+]=[N-]

Azido-PEG5-NHS ester（Cat No.:I015835）is a versatile heterobifunctional reagent tailored for bioconjugation and labeling applications. It combines an azide group, enabling efficient click chemistry reactions such as strain-promoted or copper-catalyzed cycloadditions, with an NHS ester that reacts selectively with primary amines on proteins, peptides, and other biomolecules. The PEG5 spacer enhances aqueous solubility, provides flexibility, and minimizes steric hindrance, facilitating high-yield conjugation even in complex biological systems. This reagent is widely applied in protein modification, targeted drug delivery, nanomaterial surface functionalization, and diagnostic probe development requiring stable, site-specific linkages.