TCS 46b is primarily used as a high-performance flame retardant in polymer formulations. It is especially effective in engineering plastics and thermoset resins where thermal stability and fire resistance are critical. Common applications include electrical enclosures, circuit breakers, and components in automotive and aerospace industries. Due to its compatibility with epoxy and phenolic systems, it is often integrated into composite materials used for insulating parts and structural components exposed to high temperatures. TCS 46b also exhibits good UV resistance, making it suitable for outdoor applications where long-term durability is required. Its low volatility and high decomposition temperature allow for processing at elevated temperatures without significant loss of performance.