It is widely used as a dye intermediate in the textile industry, particularly for synthesizing azo dyes that provide vibrant and durable colors to fabrics. Additionally, it serves as a key component in the production of fluorescent whitening agents, which enhance the brightness and whiteness of paper, detergents, and plastics. In analytical chemistry, it is employed as a reagent for detecting and quantifying certain metal ions due to its strong chelating properties. Its water-soluble nature and stability make it suitable for use in various industrial processes, including electroplating and as a dispersing agent in coatings and inks.