Primarily used as an intermediate in the synthesis of dyes and pigments, this compound plays a crucial role in the production of colorants for textiles, paper, and plastics. Its structure allows it to act as a coupling agent, enhancing the stability and brightness of the resulting dyes. Additionally, it finds application in biochemical research as a fluorescent probe or marker, aiding in the study of molecular interactions and cellular processes. Its sulfonic acid group contributes to its water solubility, making it suitable for use in aqueous-based systems.