Used primarily as a reagent in organic synthesis, it facilitates the introduction of sulfonate groups into various compounds. It plays a key role in the preparation of dyes and pigments, enhancing color fastness and stability. In analytical chemistry, it serves as a derivatizing agent for the detection and quantification of specific organic molecules. Additionally, it is employed in the synthesis of pharmaceuticals, where it aids in the modification of drug molecules to improve their efficacy and bioavailability. Its application in material science includes the development of specialized polymers and coatings with enhanced properties.