Azido-PEG24-NHS ester

• CAT Number: I015833
• CAS Number: 2375600-46-5
• Molecular Formula: C55H104N4O28
• Molecular Weight: 1269.42
• Purity: ≥95%
• Synonyms: (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
• InChI: InChI=1S/C55H104N4O28/c56-58-57-4-6-64-8-10-66-12-14-68-16-18-70-20-22-72-24-26-74-28-30-76-32-34-78-36-38-80-40-42-82-44-46-84-48-50-86-52-51-85-49-47-83-45-43-81-41-39-79-37-35-77-33-31-75-29-27-73-25-23-71-21-19-69-17-15-67-13-11-65-9-7-63-5-3-55(62)87-59-53(60)1-2-54(59)61/h1-52H2
• InChIKey: MGAQCNKHLTVSCR-UHFFFAOYSA-N
• SMILES: C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCN=[N+]=[N-]

Azido-PEG24-NHS（Cat No.:I015833）ester is a long, hydrophilic, heterobifunctional linker optimized for advanced bioconjugation. It features an azide group for bioorthogonal click chemistry reactions and an NHS ester that couples efficiently with primary amines on proteins, peptides, or other biomolecules. The extended PEG24 spacer provides exceptional solubility, minimizes steric interference, and increases flexibility, enabling stable, site-specific conjugates even in complex biological environments. Its long chain length is particularly useful for applications requiring distance between functional groups, such as antibody-drug conjugates, nanomaterial functionalization, targeted drug delivery, and diagnostic probe development.