Dapsone-d8, a deuterated form of dapsone, is primarily used in research and analytical applications. It serves as an internal standard in mass spectrometry and other analytical techniques to ensure accurate quantification of dapsone in biological samples. This is particularly important in pharmacokinetic studies, where precise measurement of drug concentrations in plasma, urine, or tissues is required. Additionally, it aids in the development and validation of analytical methods for dapsone detection, ensuring reliability and reproducibility in laboratory settings. Its use in metabolism studies helps track the distribution and transformation of dapsone in the body, providing insights into its pharmacological behavior.