Used primarily in bioconjugation and protein modification processes, it serves as a linker to attach polyethylene glycol (PEG) chains to biomolecules, enhancing their stability, solubility, and circulation time in biological systems. It is particularly valuable in drug delivery systems, where PEGylation improves the pharmacokinetics and reduces immunogenicity of therapeutic proteins and peptides. Additionally, it finds applications in the development of targeted therapies and diagnostics, enabling precise attachment of functional groups or targeting moieties to biomolecules. Its water-soluble nature and reactive bromoacetamide group make it a versatile tool in biotechnological and pharmaceutical research.