This compound is primarily used in research and analytical applications as an isotopically labeled internal standard. It is employed in mass spectrometry and nuclear magnetic resonance (NMR) studies to enhance the accuracy and precision of quantitative analyses. By serving as a reference, it aids in the identification and measurement of metyrosine and its metabolites in biological samples, such as blood or urine. This is particularly useful in pharmacokinetic studies, where understanding the absorption, distribution, metabolism, and excretion of metyrosine is crucial. Additionally, it supports the development of diagnostic methods for disorders related to catecholamine metabolism, such as pheochromocytoma and paraganglioma. Its labeled structure ensures minimal interference with natural isotopes, making it a reliable tool in advanced scientific investigations.