Widely used as a flame retardant in engineering plastics such as polyamides (nylon 6, nylon 66) and polyesters due to its high thermal stability and good compatibility with polymers. It is particularly effective in halogen-free flame-retardant systems, providing excellent flame inhibition and self-extinguishing properties without releasing toxic halogenated gases during combustion. Commonly applied in electrical and electronic components, automotive parts, and connectors where high tracking resistance and long-term thermal stability are required. Also used in combination with synergists like melamine cyanurate to enhance flame retardancy and meet UL94 V-0 ratings. Offers good mechanical property retention after compounding and low corrosion potential, making it suitable for sensitive electronic applications.