Used primarily as an intermediate in the synthesis of dyes and pigments, particularly in the production of azo dyes, which are widely applied in textiles, leather, and paper industries. It also finds use in the development of hair dye formulations due to its ability to form stable colorants when combined with other compounds. Additionally, it serves as a reagent in organic synthesis for creating complex molecules in pharmaceutical and chemical research. Its sulfate form enhances stability and solubility, making it suitable for various industrial applications.