Used primarily in the synthesis of dyes and pigments, this compound serves as an intermediate in the production of colorants for textiles, paper, and plastics. Its reactive aldehyde and sulfonic acid groups make it valuable for creating water-soluble dyes with enhanced brightness and stability. Additionally, it is employed in the preparation of pharmaceutical intermediates, contributing to the development of various medicinal compounds. Its sulfonic acid group also allows for applications in ion-exchange resins and as a dispersing agent in industrial processes.