Used as a flame retardant and plasticizer in various polymers, particularly in engineering plastics such as polycarbonates, polyesters, and ABS. It helps improve thermal stability, reduces flammability, and provides plasticizing effects without significantly affecting the mechanical properties of the material. Commonly found in electronic components, including circuit boards and connectors, where fire safety is critical. Also employed in adhesives and coatings for enhanced fire resistance, and as a component in flame-retardant hydraulic fluids for high-temperature stability. Its liquid form allows for easy incorporation into formulations, providing flexibility in processing.