Used primarily as an odorant in natural gas and propane to detect leaks due to its strong, unpleasant smell. It is added in small concentrations because natural gas is otherwise odorless and poses a safety risk. THT is preferred in some regions due to its stability, low reactivity, and long-lasting odor. It is also used as a solvent and in chemical synthesis, particularly in the production of pharmaceuticals and agrochemicals. Its sulfur-containing structure makes it useful as a ligand or intermediate in certain catalytic reactions.