Used primarily in research and development, it serves as an internal standard in analytical chemistry for precise quantification of sulfonamides in various samples. Its deuterated form enhances accuracy in mass spectrometry by minimizing interference from non-deuterated compounds. Applied in pharmacokinetic studies, it aids in tracking drug metabolism and distribution. Additionally, it supports the development of therapeutic agents by providing reliable data on sulfonamide behavior in biological systems. Its stability and isotopic labeling make it valuable in environmental monitoring to detect sulfonamide residues in water and soil.