Tetradecyl sulfide is primarily used as a lubricant additive in various industrial applications. Its chemical structure allows it to reduce friction and wear in machinery, enhancing the performance and longevity of mechanical components. It is also employed in the formulation of metalworking fluids, where it helps in improving the efficiency of cutting, grinding, and shaping processes. Additionally, tetradecyl sulfide finds use in the production of specialty chemicals, where it serves as an intermediate in the synthesis of more complex compounds. Its properties make it valuable in applications requiring thermal stability and resistance to oxidation.