Mal-amido-PEG9-acid

• CAT Number: I016337
• CAS Number: 2112731-43-6
• Molecular Formula: C28H48N2O14
• Molecular Weight: 636.69
• Purity: ≥95%
• Synonyms: 3-[2-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid
• InChI: InChI=1S/C28H48N2O14/c31-25(3-6-30-26(32)1-2-27(30)33)29-5-8-37-10-12-39-14-16-41-18-20-43-22-24-44-23-21-42-19-17-40-15-13-38-11-9-36-7-4-28(34)35/h1-2H,3-24H2,(H,29,31)(H,34,35)
• InChIKey: XOHZWIACQTZJNF-UHFFFAOYSA-N
• SMILES: C1=CC(=O)N(C1=O)CCC(=O)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)O

Mal-amido-PEG9-acid(CAT: I016337) is a heterobifunctional polyethylene glycol (PEG) linker featuring a maleimide group on one end and a terminal carboxylic acid on the other, connected through a nine-unit PEG spacer. The maleimide functionality allows site-specific conjugation to thiol-containing molecules, forming stable thioether linkages with cysteine residues in peptides, proteins, or other biomolecules. The PEG9 chain provides hydrophilicity, flexibility, and extended spacing, reducing steric hindrance and improving solubility in both aqueous and organic systems. Meanwhile, the terminal carboxylic acid can be activated for coupling with amines or other nucleophiles. This reagent is commonly used in bioconjugation, drug delivery, and material surface modification.