Used as a key reagent in organic synthesis, particularly for introducing sulfonyl chloride groups into complex molecules. It serves in the preparation of tris-sulfonyl derivatives which act as intermediates in pharmaceuticals and agrochemicals. Its high reactivity allows for efficient chlorination and sulfonylation under controlled conditions. Commonly applied in the development of functional materials and in polymer chemistry to modify resin properties. Also utilized in research settings for cross-linking agents and in the synthesis of specialty sulfonamide compounds.