4-Biphenylyl isocyanate is a specialty chemical intermediate featuring a reactive isocyanate functional group, used primarily in the synthesis of polymers and resins. It acts as a key building block for producing materials with enhanced durability and chemical resistance through reactions forming urethane or urea linkages. It is also employed in the development of specialty coatings and adhesives, providing strong bonding properties and stability under various environmental conditions. In the pharmaceutical industry, it serves as a building block for creating compounds with potential therapeutic applications. Additionally, it is utilized in research for designing advanced materials with tailored properties for industrial and technological uses.