Aniline-13C6 is primarily used as a labeled compound in research and analytical applications. Its carbon-13 labeling makes it valuable in nuclear magnetic resonance (NMR) spectroscopy, where it serves as a tracer to study reaction mechanisms, molecular structures, and dynamics in chemical and biological systems. It is also employed in mass spectrometry (MS) for quantitative analysis, helping to track and measure aniline derivatives in complex mixtures. Additionally, it aids in environmental and pharmaceutical studies to understand the metabolism and degradation pathways of aniline-based compounds. Its isotopic labeling ensures precise and reliable data in these investigations.