Used primarily in hair dye formulations, it acts as a key intermediate in oxidative hair coloring processes. It helps in achieving long-lasting and vibrant colors by reacting with other dye components under oxidative conditions. Additionally, it finds application in the synthesis of polyurethane foams and coatings, where it serves as a chain extender or cross-linking agent, enhancing the material's durability and mechanical properties. In the field of analytical chemistry, it is utilized as a reagent for the detection of certain metals and organic compounds, aiding in qualitative and quantitative analysis. Its role in the production of azo dyes and pigments is also notable, contributing to the creation of a wide range of colors for textiles and plastics. Furthermore, it is used as an antioxidant in the rubber industry to prevent oxidative degradation and as a developing agent in black-and-white photography.