Propargyl-PEG4-CH2COOH

• CAT Number: I014628
• CAS Number: 1429934-37-1
• Molecular Formula: C13H22O7
• Molecular Weight: 290.31
• Purity: ≥95%
• Synonyms: 2-[2-[2-[2-(2-prop-2-ynoxyethoxy)ethoxy]ethoxy]ethoxy]acetic acid
• InChI: InChI=1S/C13H22O7/c1-2-3-16-4-5-17-6-7-18-8-9-19-10-11-20-12-13(14)15/h1H,3-12H2,(H,14,15)
• InChIKey: QOUMZZIPISUGKO-UHFFFAOYSA-N
• SMILES: C#CCOCCOCCOCCOCCOCC(=O)O

Propargyl-PEG4-CH2COOH（Cat No.:I014628）is a heterobifunctional PEG-based linker tailored for versatile bioconjugation strategies. It features a terminal propargyl group that enables efficient copper-catalyzed or strain-promoted click chemistry with azides, supporting site-specific and stable conjugation. The terminal carboxylic acid allows further coupling to primary amines through amide bond formation, expanding functionalization options. The PEG4 spacer improves solubility, flexibility, and reduces steric hindrance, ensuring compatibility with biomolecules, peptides, and polymers. This reagent is widely used in drug delivery, diagnostic probe development, and chemical biology for constructing multifunctional and modular conjugates with precision.