Nordiazepam-D5 (Nordazepam-D5) is a stable-labeled internal standard used for the quantification of nordiazepam. Nordiazepam, also known as nordazepam and desmethyldiazepam, belongs to the benzodiazepine class. Nordiazepam contains sedative, anticonvulsant, anxiolytic, and muscle relaxant properties and is an active metabolite of diazepam. It is primarily used in the treatment of anxiety. Nordiazepam-D5 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.