Sodium 2-Amino-1-naphthalenesulfonate is widely used as an intermediate in the synthesis of dyes and pigments. It plays a crucial role in the production of azo dyes, which are commonly applied in textiles, leather, and paper industries to achieve vibrant and long-lasting colors. Additionally, it is utilized in the manufacturing of fluorescent whitening agents, which enhance the brightness of materials like detergents, plastics, and fabrics. In analytical chemistry, this compound serves as a reagent for detecting and quantifying specific ions or molecules due to its reactive amino and sulfonate groups. Its applications also extend to research and development, where it is used in the study of organic reactions and synthesis pathways.