This chemical is primarily used as a reactive intermediate in the synthesis of complex organic molecules, particularly in bioconjugation and crosslinking applications. It is often employed in the modification of biomolecules, such as proteins, peptides, and antibodies, to introduce specific functional groups or linkers. The compound’s structure, featuring an N-hydroxysuccinimide (NHS) ester and a polyethylene glycol (PEG) spacer, makes it suitable for creating stable amide bonds with primary amines in biomolecules. This property is valuable in drug delivery systems, where it helps enhance solubility, stability, and biocompatibility of therapeutic agents. Additionally, it is utilized in the development of bioconjugates for targeted therapies, diagnostic imaging, and research tools in biochemistry and molecular biology.