7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid is primarily used in the dye and textile industry as an intermediate for the synthesis of azo dyes. These dyes are widely applied in coloring fabrics, leather, and paper due to their vibrant and stable color properties. The compound’s sulfonic acid group enhances its solubility in water, making it suitable for dyeing processes in aqueous solutions. Additionally, it is utilized in the production of specialty chemicals for research and industrial applications, where its unique structure contributes to the development of functional materials. Its role in creating colorants for inks and coatings further extends its utility in various manufacturing sectors.