Sodium 1-Naphthol-8-sulfonate is primarily used in the textile industry as a dye intermediate. It plays a crucial role in the synthesis of azo dyes, which are widely employed for coloring fabrics. The compound enhances the colorfastness and brightness of dyes, ensuring vibrant and durable results on textiles. Additionally, it is utilized in analytical chemistry as a reagent for detecting and quantifying specific metal ions, such as aluminum and iron, due to its ability to form colored complexes. Its application extends to the pharmaceutical industry, where it serves as an intermediate in the production of certain drugs. The compound’s sulfonate group also makes it useful in water treatment processes, where it acts as a dispersant to prevent the formation of scale and deposits in industrial systems.