Used as a key intermediate in the synthesis of sulfa drugs and other biologically active sulfonamide compounds. Its reactive sulfonyl chloride group allows for easy attachment to amines, forming sulfonamides with potential antimicrobial or anti-inflammatory properties. Also employed in agrochemical manufacturing for developing herbicides and plant growth regulators due to its ability to modify aromatic structures with electron-withdrawing groups. The nitrile and chloro functionalities enable further chemical transformations, making it valuable in multi-step organic synthesis, particularly in pharmaceutical research and development.