m-PEG-NHS ester (MW 20000)

• CAT Number: I045918
• CAS Number: 92451-01-9
• Molecular Formula: (C2H4O)nC7H9NO5
• Molecular Weight: 20000(Average)
• Purity: ≥95%

m-PEG-NHS ester (MW 20000)（Cat No.:I045918）is a long-chain, methoxy-terminated polyethylene glycol derivative bearing an N-hydroxysuccinimide (NHS) ester group for efficient bioconjugation. The NHS ester reacts selectively with primary amines on proteins, peptides, or other biomolecules to form stable amide bonds. With a molecular weight of 20,000, the PEG chain provides excellent water solubility, extended hydrodynamic size, and strong steric stabilization, reducing aggregation and nonspecific binding. This reagent is ideal for protein modification, drug delivery, nanoparticle functionalization, and biomaterial engineering where high molecular weight PEG offers enhanced circulation and stealth properties.