Aniline-15N is primarily used as a labeled compound in research and analytical applications. It serves as a stable isotope tracer in studies involving metabolic pathways, chemical reactions, and environmental processes. Its nitrogen-15 isotope allows for precise tracking and analysis in nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry, aiding in the understanding of reaction mechanisms and molecular structures. Additionally, it is employed in the synthesis of labeled pharmaceuticals and agrochemicals to study their behavior and degradation in biological and environmental systems. This compound is also useful in isotopic labeling experiments to investigate nitrogen-containing compounds in various scientific fields.