Used as a key intermediate in the synthesis of sulfa drugs, particularly in the preparation of sulfonamide antibiotics. It serves as a reactive building block in medicinal chemistry due to the presence of both amine and sulfonyl fluoride groups, enabling conjugation in bioconjugation techniques and development of enzyme inhibitors. Commonly employed in the fabrication of covalent inhibitors and probes for target identification in drug discovery. Also utilized in the preparation of dyes and fluorescent tags for biochemical assays. Its dual functionality allows for sequential reactions, making it valuable in multi-step organic synthesis.