Rifampicin-d8 is a stable isotope-labeled compound of Rifampicin. Rifampicin is a broad-spectrum antibiotic that exerts antibacterial effects mainly by inhibiting bacterial DNA-dependent RNA polymerase. The deuterated properties of Rifampicin-d8 make it important for applications in pharmacokinetic studies, metabolic analysis, and isotope tracing experiments, especially in biomedical research and drug development. Because it has biological activity similar to the parent compound Rifampicin, Rifampicin-d8 can be used to study the inhibition mechanism of bacterial RNA polymerase, as well as to evaluate the in vivo distribution and metabolic pathways of antibiotics. The dose or concentration used in experiments typically depends on the experimental design and research objectives.