Tert-butyl methyl sulfide is primarily used in organic synthesis as a building block for more complex chemical compounds. It serves as a key intermediate in the production of pharmaceuticals, where it can be incorporated into drug molecules to modify their properties, such as solubility or stability. Additionally, it is utilized in the synthesis of agrochemicals, contributing to the development of pesticides and herbicides. Its sulfur-containing structure makes it valuable in the creation of sulfur-based ligands for catalysis, particularly in transition metal catalysis, where it can enhance reaction efficiency. Furthermore, it finds application in material science for the development of specialty chemicals and polymers, where its unique structure can impart specific characteristics to the final product.