Used in bioconjugation processes to link biomolecules such as peptides, proteins, and antibodies with improved solubility and reduced immunogenicity. Its long PEG chain provides flexibility and spacing, making it ideal for creating spacers in diagnostic assays and targeted drug delivery systems. Commonly employed in the development of PEGylated therapeutics to extend circulation half-life. Also utilized in surface functionalization of nanoparticles and biosensors to enhance biocompatibility and reduce non-specific binding. Suitable for click chemistry applications when combined with reactive groups like NHS esters or malemides.