This chemical is primarily used in biochemical research, particularly in the field of protein labeling and crosslinking. It serves as a bifunctional crosslinker, enabling the connection of two biomolecules, such as proteins or peptides, through their reactive functional groups. Its isothiocyanate groups react with amino groups, making it useful for modifying amino acids like lysine in proteins. This property is valuable in studying protein interactions, structure, and function. Additionally, it has applications in the preparation of immunoconjugates, where it links antibodies to other molecules for diagnostic or therapeutic purposes. Its stability and reactivity make it a useful tool in various bioconjugation techniques.