4-tert-Butylbenzyl mercaptan is primarily used as a key intermediate in the synthesis of various organic compounds, particularly in the production of fragrances and flavors. Its unique structure allows it to impart specific aromatic characteristics, making it valuable in creating scents for perfumes, cosmetics, and personal care products. Additionally, it is employed in the development of certain pharmaceuticals, where its chemical properties contribute to the synthesis of active ingredients. In industrial applications, it serves as a building block for the production of specialty chemicals, including those used in agrochemicals and polymers. Its role in these industries highlights its versatility and importance in chemical manufacturing processes.