Used primarily as an intermediate in the synthesis of sulfa drugs and other biologically active sulfonamide compounds. It plays a key role in pharmaceutical manufacturing, particularly in the development of antimicrobial and anti-inflammatory agents. The presence of the sulfonyl chloride group allows for easy attachment to amines, enabling the formation of sulfonamide bonds essential in many therapeutic molecules. Its acetylated amine and methyl substituents contribute to steric and electronic properties that enhance selectivity and stability in the final drug compounds. Also utilized in research settings for the preparation of novel sulfonamide derivatives for structure-activity relationship studies.