2-Phenylethanethiol is primarily used in the flavor and fragrance industry due to its strong, distinctive odor reminiscent of garlic or onions. It is often employed as an additive in food products to impart a savory or meaty aroma, enhancing the sensory experience of processed foods. Additionally, it finds application in the synthesis of certain agrochemicals and pharmaceuticals, where its thiol group acts as a reactive site for chemical modifications. In research, it serves as a building block for organic synthesis, particularly in the development of sulfur-containing compounds. Its unique scent also makes it useful in odorant formulations for leak detection in natural gas systems.