Used primarily in the synthesis of azo dyes and pigments, this compound serves as a key intermediate in the dye industry. Its structure allows for diazotization, enabling the formation of colored compounds used in textiles, inks, and coatings. It is also employed in the production of certain sulfa drugs and other pharmaceuticals where sulfonamide groups are required. Additionally, it finds use in the development of functional polymers and as a building block in organic synthesis for introducing sulfonic acid functionalities.