This compound is widely used in bioconjugation chemistry, particularly for attaching biomolecules to surfaces or other molecules. It serves as a linker in the modification of proteins, peptides, or antibodies, enabling the introduction of functional groups for further chemical reactions. Its NHS ester group reacts efficiently with primary amines, forming stable amide bonds, while the bromoacetamido group allows for thiol-specific conjugation. This makes it valuable in drug delivery systems, where it helps create targeted therapies by linking drugs to carriers or antibodies. Additionally, it is employed in the development of biosensors and diagnostic tools, facilitating the immobilization of biomolecules onto solid supports for accurate detection and analysis. Its PEG4 spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes.