Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical industry. It participates in the preparation of sulfonamide derivatives, which are key structures in various bioactive molecules and drug candidates. Its reactivity allows for the introduction of sulfonyl groups into aromatic systems, facilitating the development of compounds with antimicrobial, anti-inflammatory, or kinase-inhibiting properties. Commonly employed in cross-coupling reactions and electrophilic substitutions due to the presence of both bromo and sulfonyl chloride functional groups, enabling selective modifications in complex molecule assembly. Also utilized in agrochemical synthesis for building functionalized aromatic frameworks.