Used primarily as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a key reagent for introducing the 2,5-dimethylbenzenesulfonyl group into molecules, which can enhance their stability or biological activity. Additionally, it is employed in the preparation of dyes and pigments, where it acts as a sulfonating agent to modify the properties of the final product. Its role in the development of specialty chemicals and polymers is also notable, as it can be used to create sulfonated polymers with specific functional characteristics.