Methanol-13C is widely used as a tracer in metabolic studies and research involving isotope labeling. Its primary application lies in tracking and analyzing biochemical pathways, particularly in understanding the metabolism of methanol in organisms. It is also employed in nuclear magnetic resonance (NMR) spectroscopy as a labeled solvent, aiding in the precise analysis of molecular structures and dynamics. Additionally, it serves as a key component in the synthesis of labeled compounds for pharmaceutical and environmental studies, enabling researchers to monitor chemical reactions and degradation processes with high accuracy. Its use extends to breath tests for diagnosing certain medical conditions, where it helps measure metabolic activity.