Benzyl mercaptan is primarily used as an intermediate in the synthesis of various organic compounds, including pharmaceuticals and agrochemicals. It is also employed in the production of flavors and fragrances, where its distinct sulfurous aroma contributes to the formulation of certain scents. In the polymer industry, it serves as a chain transfer agent in the polymerization process to control molecular weight. Additionally, it is utilized in research and development for studying chemical reactions involving thiol groups. Its strong odor makes it useful in odorant formulations for leak detection in natural gas systems.