Azido-PEG4-hydrazide

• CAT Number: I015799
• CAS Number: 2170240-96-5
• Molecular Formula: C11H23N5O5
• Molecular Weight: 305.33
• Purity: ≥95%
• Synonyms: 3-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]propanehydrazide
• InChI: InChI=1S/C11H23N5O5/c12-15-11(17)1-3-18-5-7-20-9-10-21-8-6-19-4-2-14-16-13/h1-10,12H2,(H,15,17)
• InChIKey: BUAWGAVOHIVJRC-UHFFFAOYSA-N
• SMILES: C(COCCOCCOCCOCCN=[N+]=[N-])C(=O)NN

Azido-PEG4-hydrazide（Cat No.:I015799）is a heterobifunctional reagent designed for versatile and efficient bioconjugation. It features a terminal azide group that enables copper-catalyzed or strain-promoted click chemistry with alkynes, and a reactive hydrazide moiety that couples with aldehydes or ketones to form stable hydrazone linkages. The PEG4 spacer provides hydrophilicity, flexibility, and reduced steric hindrance, enhancing solubility and biomolecular accessibility in aqueous and organic media. This dual-reactive design makes it highly useful in chemical biology, proteomics, drug discovery, and biomaterials, supporting modular, site-specific labeling and multifunctional molecular engineering strategies.