Used extensively in the photographic industry as a developing agent for color films and papers. It helps in the formation of dye images by reacting with oxidized color couplers. Also employed in hair dye formulations, where it acts as a primary intermediate to produce long-lasting color by oxidative coupling with other chemicals. In analytical chemistry, it serves as a reagent for detecting and quantifying certain substances, such as hydrogen peroxide, due to its redox properties. Additionally, it finds application in the synthesis of organic compounds, particularly in the production of dyes and pigments.