Hydroxylamine chloride-15N is primarily used as a labeled compound in research and analytical applications, particularly in studies involving nitrogen metabolism and tracing. It serves as a stable isotope tracer in environmental and biological systems to understand nitrogen cycling processes. In biochemistry, it is employed to investigate enzyme mechanisms, especially those involving nitrogen-containing compounds. Additionally, it is utilized in nuclear magnetic resonance (NMR) spectroscopy as a labeled reagent to enhance the clarity and specificity of nitrogen-related signals. Its application extends to the synthesis of isotopically labeled pharmaceuticals and agrochemicals, aiding in the study of their metabolic pathways and environmental impact.