PEG45

This series comprises polyethylene glycol derivatives with a defined chain length of 45 ethylene oxide units—commonly referred to as Polyethylene Glycol 45 (PEG45)—offering precise molecular weight and uniform properties. These PEGs are commonly used as spacers, linkers, or modifiers to enhance solubility, reduce immunogenicity, and improve stability in bioconjugates and formulations. The consistent chain length ensures reproducible performance in pharmaceutical, diagnostic, and materials science applications.