7-Aminoflunitrazepam-D3 is a stable isotope-labeled internal standard of 7-Aminoflunitrazepam. 7-Aminoflunitrazepam is a benzodiazepine and a major metabolite of flunitrazepam. Its presence in urine confirms the use of its parent drug, flunitrazepam. 7-Aminoflunitrazepam-D3 is available as reference material (bulk powder and/or solution) and as calibrated, Ready-to-Use, certified reference material (CRM). This product is designed for qualitative and quantitative protocols and can be used for forensic, toxicology, research, and other chemical/biochemical analytical applications.