Used primarily as a sulfonylating agent in organic synthesis, enabling the introduction of the 3,5-dimethylbenzenesulfonyl group to amines and alcohols. This facilitates the formation of sulfonamides and sulfonate esters, which are key intermediates in pharmaceutical development. It is particularly valuable in the preparation of protected forms of amino compounds in multi-step syntheses. Its steric and electronic properties make it suitable for selective reactions in complex molecule assembly, including in the production of bioactive molecules and agrochemicals.