Used as a reactive flame retardant in polymer manufacturing, particularly in styrenic resins, polyurethanes, and acrylics. It copolymerizes with other monomers, becoming chemically bonded into the polymer matrix, which enhances flame resistance without leaching. This makes it suitable for electronics enclosures, circuit boards, and construction materials where long-term thermal stability and fire safety are critical. Its bromine content effectively suppresses combustion, meeting flammability standards without compromising material clarity or mechanical properties in transparent applications.