Used as an intermediate in the synthesis of dyes and pharmaceuticals, particularly in the production of azo dyes due to its ability to undergo diazotization and coupling reactions. It also serves as a building block in the preparation of antioxidants and UV absorbers for polymers and coatings. In the textile industry, it acts as a dyeing assistant to improve color adhesion and uniformity, functioning as a color dispersant in wool and other protein fabrics. In the leather industry, it is used to condition leather before dyeing, enhancing dye penetration into the fibers. Additionally, it finds use in electroplating baths as a brightening agent and stabilizer. Its sulfonate group enhances water solubility, making it suitable for applications requiring good dispersion in aqueous systems, including as an additive in industrial cleaning agents to improve the solubility of dirt and grease. It is also utilized in material chemistry research, such as developing high-efficiency ion exchange resins for capturing heavy metals from wastewater.