Used primarily as an intermediate in the synthesis of dyes, pigments, and agrochemicals. Its sulfonic acid group enhances water solubility, making it valuable in the production of water-soluble dyes and colorants. Commonly employed in the manufacture of sulfa drugs and other pharmaceuticals where a chlorinated aromatic scaffold is required. Also serves as a building block in the development of specialty chemicals, including surfactants and corrosion inhibitors. Its dihydrate form improves stability during storage and handling, supporting consistent performance in industrial processes.