Azido-PEG4-(CH2)3OH

• CAT Number: I016793
• CAS Number: 2028281-87-8
• Molecular Formula: C11H23N3O5
• Molecular Weight: 277.32
• Purity: ≥95%
• Synonyms: 3-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]propan-1-ol
• InChI: InChI=1S/C11H23N3O5/c12-14-13-2-5-17-7-9-19-11-10-18-8-6-16-4-1-3-15/h15H,1-11H2
• InChIKey: GGAFKPLUTSFPET-UHFFFAOYSA-N
• SMILES: C(CO)COCCOCCOCCOCCN=[N+]=[N-]

Azido-PEG4-(CH₂)₃OH(CAT: I016793) is a versatile PEG-based linker featuring a terminal azide group and a hydroxyl functionality separated by a flexible PEG4 spacer and a propyl chain. The azide moiety enables efficient copper-catalyzed azide–alkyne cycloaddition (CuAAC, “click chemistry”) with alkyne-containing molecules, forming stable triazole linkages. The hydroxyl group provides a handle for further chemical derivatization, offering flexibility in custom conjugation strategies. The PEG4 unit enhances solubility, reduces steric hindrance, and increases conformational freedom, improving reaction efficiency. Azido-PEG4-(CH₂)₃OH is widely used in chemical biology, drug delivery, and biomaterials research for modular assembly of multifunctional probes and conjugates.