Used as a sulfur-based antioxidant and vulcanization aid in rubber manufacturing. It helps improve thermal stability and aging resistance in rubber products, especially in tires and industrial rubber goods. Its sterically hindered phenyl groups enhance performance under high-temperature processing conditions. Also acts as a secondary accelerator in sulfur vulcanization systems, promoting efficient crosslinking with reduced risk of reversion. Commonly employed in dynamic rubber applications requiring long-term durability and oxidative resistance.