Used primarily as an intermediate in the synthesis of various pharmaceuticals and agrochemicals, it plays a crucial role in the production of active ingredients. Its chlorosulfonyl group allows for further functionalization, making it valuable in creating compounds with specific biological activities. Additionally, it is employed in the development of dyes and pigments due to its ability to form stable bonds with other organic molecules. Its hydroxy and carboxylic acid groups enhance its reactivity, enabling its use in the preparation of complex chemical structures.