4-Chloro-3-sulfamoylbenzoic acid is primarily used in the pharmaceutical industry as an intermediate in the synthesis of various active pharmaceutical ingredients (APIs). It plays a crucial role in the development of diuretic and antihypertensive drugs, particularly those targeting the inhibition of carbonic anhydrase enzymes. This compound is also utilized in research settings for the preparation of sulfonamide derivatives, which are explored for their potential therapeutic applications, including antimicrobial and anticancer properties. Additionally, it finds use in organic synthesis as a building block for creating more complex molecules with specific biological activities.