Used primarily in research and development, this compound serves as a stable isotope-labeled internal standard in analytical chemistry. It is particularly valuable in mass spectrometry and chromatography studies, where it aids in the accurate quantification and detection of dapsone and its metabolites in biological samples. Its deuterated form ensures minimal interference with the analysis, providing reliable data for pharmacokinetic and metabolic studies. Additionally, it supports the development of diagnostic methods and therapeutic monitoring in clinical settings.