Sodium 4-Aminobenzenesulfonate Hydrate is widely used in the dye industry as an intermediate for the synthesis of azo dyes. These dyes are essential for coloring textiles, leather, and paper, providing vibrant and long-lasting colors. It also serves as a key component in the production of optical brighteners, which enhance the whiteness and brightness of fabrics and detergents. In the pharmaceutical sector, it is utilized as a precursor for manufacturing certain drugs, including sulfonamide antibiotics. Additionally, it finds application in chemical research as a reagent for various organic synthesis processes. Its water-soluble nature makes it suitable for use in formulations requiring easy dissolution and compatibility with aqueous systems.