Used as a reactive flame retardant in polymers, particularly in high-impact polystyrene and engineering plastics. It functions by integrating into the polymer matrix during processing, providing flame resistance without significant migration or leaching. Commonly applied in electronic enclosures, automotive components, and wire and cable materials where thermal stability and fire safety are critical. Its reactive nature allows it to form covalent bonds with the polymer chain, enhancing durability and long-term performance under heat stress.