Used as a sulfonating agent in organic synthesis, particularly for introducing sulfonic acid groups into molecules. Commonly employed in the production of surfactants, dyes, and pharmaceuticals due to its ability to enhance water solubility and stability of compounds. Acts as a precursor in synthesizing betaine-type zwitterions used in personal care products and detergents. Also utilized in electroplating baths and as a modifier in polymer chemistry to improve surface properties. Its reactivity makes it valuable in creating functional intermediates for agrochemicals and specialty chemicals.