Barium carbonate-13C is primarily used in research and analytical applications due to its isotopic labeling with carbon-13. It serves as a tracer in studies involving carbon pathways and reactions, particularly in environmental and geochemical research. This compound is also utilized in nuclear magnetic resonance (NMR) spectroscopy to investigate molecular structures and dynamics, providing insights into chemical processes. Additionally, it finds application in the development of advanced materials, where the isotopic label aids in tracking and understanding material behavior at a molecular level.