Used as a flame retardant in engineering plastics, particularly in polycarbonate and polybutylene terephthalate (PBT) resins. It provides excellent thermal stability and maintains material clarity, making it suitable for electronic components, connectors, and parts requiring high flame resistance without compromising mechanical properties. Also used in some adhesive and coating formulations to improve fire safety. Shows good compatibility with polymers and low volatility, enhancing long-term performance in high-temperature applications.