4-Anilinobenzenesulfonic acid

4-Anilinobenzenesulfonic acid consists of a benzene ring with an amino group (-NH2) and a sulfonic acid group (-SO3H) attached to the 4-position, making it a member of the sulfonic acid family. 4-Anilinobenzenesulfonic acid is commonly used in the chemical industry as a precursor in the synthesis of various dyes and pigments.