This compound is primarily used as a stable isotope-labeled internal standard in analytical chemistry, particularly in mass spectrometry. Its deuterated form ensures accurate quantification and identification of similar compounds in complex biological or chemical samples. It is especially valuable in metabolomics and proteomics studies, where precise measurement of metabolites or proteins is crucial. The compound’s sulfonic acid group enhances its solubility in aqueous solutions, making it suitable for use in liquid chromatography-mass spectrometry (LC-MS) applications. Its application extends to research in pharmacokinetics, biomarker discovery, and environmental analysis, where it aids in tracking and quantifying target molecules with high specificity and reliability.