Ammonium nitrate-15N2 is primarily used as a stable isotope-labeled compound in scientific research and analytical applications. It serves as a tracer in studies related to nitrogen cycling in agricultural and environmental systems, helping researchers understand fertilizer uptake, soil nitrogen dynamics, and plant metabolism. In environmental science, it aids in tracking nitrogen pollution sources and studying nitrogen transformations in ecosystems. Additionally, it is employed in metabolic research to investigate nitrogen assimilation pathways in plants, microorganisms, and animals. Its isotopic labeling allows for precise monitoring and quantification of nitrogen-containing compounds in complex biological and chemical processes.