3,5-Dimethylbenzenethiol is primarily used in organic synthesis as a building block for more complex chemical compounds. Its thiol group makes it a valuable reagent in the preparation of sulfur-containing molecules, which are often utilized in the production of pharmaceuticals, agrochemicals, and specialty chemicals. Additionally, it can serve as a ligand in coordination chemistry, aiding in the stabilization of metal complexes. The compound is also employed in the synthesis of polymers and resins, where its aromatic structure contributes to the material's stability and performance. In research, it is used to study reaction mechanisms involving sulfur-containing compounds.