This compound is primarily used in bioconjugation and protein labeling applications. It serves as a heterobifunctional crosslinker, enabling the attachment of biomolecules such as peptides, proteins, or antibodies to other molecules or surfaces. Its structure contains an NHS ester group, which reacts with primary amines to form stable amide bonds, and a maleimide group, which specifically reacts with thiol groups. This makes it highly effective for creating stable conjugates in biochemical research, drug delivery systems, and diagnostic assays. Additionally, its polyethylene glycol (PEG) spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes.