Thiourea-13C,15N2 is widely used in research and analytical chemistry as a stable isotope-labeled compound. It serves as a valuable tracer in metabolic studies, allowing scientists to track and understand biochemical pathways and transformations in various organisms. Its labeled atoms (13C and 15N) make it particularly useful in nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry, where it aids in the precise identification and quantification of compounds in complex mixtures. Additionally, it is employed in environmental studies to investigate the fate and transport of nitrogen and carbon in ecosystems. Its application extends to pharmaceutical research, where it helps in the development and testing of new drugs by providing insights into drug metabolism and pharmacokinetics.