N-Phenylhydroxylamine is primarily used as an intermediate in organic synthesis, particularly in the production of dyes, pharmaceuticals, and agrochemicals. It plays a crucial role in the synthesis of azo dyes, where it acts as a reducing agent to form diazo compounds. In the pharmaceutical industry, it is utilized in the preparation of various active pharmaceutical ingredients (APIs) and as a reagent in the synthesis of heterocyclic compounds. Additionally, N-Phenylhydroxylamine is employed in the rubber industry as an antioxidant and antiozonant to enhance the durability and stability of rubber products. Its ability to act as a reducing agent also makes it valuable in certain polymerization processes and in the stabilization of certain chemical formulations.