N-Hydroxy-4-aminobiphenyl is primarily used in scientific research and laboratory settings to study biochemical processes and toxicology, particularly in cancer research. This compound is known for its ability to induce genetic mutations and serves as a key intermediate in investigating the mechanisms of carcinogenesis induced by aromatic amines. It is employed in laboratories to examine oxidation reactions and chemical transformations in biological systems, aiding in the development of understanding regarding the health impacts of chemicals on humans.