Metronidazole-d4 (Standard) is the standard substance of Metronidazole-d4, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Metronidazole-d4 is a deuterium labeled compound for Metronidazole, which can be used for isotopic tracing.Metronidazole is a synthetic nitroimidazole derivative, an antibiotic and antiprotozoal agent with oral activity and blood-brain-barrier penetration for infections caused by anaerobic bacteria.