Used primarily as a crosslinking agent in polymer chemistry, especially in the production of polyurethanes and epoxy resins. Its isothiocyanate groups react readily with hydroxyl, amine, or thiol groups, enabling strong covalent bonding between polymer chains. This enhances mechanical strength, thermal stability, and chemical resistance of the final material. It is also employed in specialty adhesives and coatings where durability under harsh conditions is required. Additionally, it has been utilized in research settings for modifying proteins and surfaces due to its ability to form stable thiourea linkages.