Mal-Amido-PEG4-Boc

• CAT Number: I015721
• CAS Number: 1415800-35-9
• Molecular Formula: C22H36N2O9
• Molecular Weight: 472.53
• Purity: ≥95%
• Synonyms: tert-butyl 3-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
• InChI: InChI=1S/C22H36N2O9/c1-22(2,3)33-21(28)7-10-29-12-14-31-16-17-32-15-13-30-11-8-23-18(25)6-9-24-19(26)4-5-20(24)27/h4-5H,6-17H2,1-3H3,(H,23,25)
• InChIKey: XYOMHLPGMUCBGN-UHFFFAOYSA-N
• SMILES: CC(C)(C)OC(=O)CCOCCOCCOCCOCCNC(=O)CCN1C(=O)C=CC1=O

Mal-Amido-PEG4-Boc（Cat No.:I015721）is a heterobifunctional polyethylene glycol linker designed for versatile bioconjugation applications. It features a maleimide group that reacts selectively with thiol residues, forming stable thioether bonds, and a Boc-protected amine that can be deprotected under mild conditions for further conjugation. The PEG4 spacer provides hydrophilicity, flexibility, and reduces steric hindrance, ensuring improved solubility and stability in aqueous and organic systems. This reagent is widely utilized in protein–drug conjugates, peptide modifications, and advanced biomaterial development, enabling precise, controlled, and efficient molecular linking strategies.