This chemical is widely used in bioconjugation processes, particularly for attaching biomolecules like proteins, peptides, or antibodies to other molecules or surfaces. Its NHS ester group reacts with primary amines, forming stable amide bonds, while the azide group allows for click chemistry reactions, such as with alkynes. This makes it valuable in drug delivery systems, where it helps create targeted therapies by linking drugs to carriers. It is also utilized in the development of biosensors, enabling the immobilization of biomolecules on sensor surfaces for detection purposes. Additionally, it plays a role in research applications, such as labeling and tracking biomolecules in cellular studies. Its PEG spacer enhances solubility and reduces steric hindrance, improving efficiency in these applications.