Ammeline is a nitrogen-based chemical compound that is used in various industrial processes. Stable isotopes of ammeline, such as nitrogen-15, are commonly used in scientific research and medical applications. These isotopes can be used to trace the movement of nitrogen in biological systems and to determine the metabolic pathways of nitrogen-containing compounds. Ammeline stable isotopes are also used in environmental studies to track the movement of nitrogen in ecosystems, and in agriculture to improve crop yields and reduce fertilizer use.