[CAS Number 65891-81-8] Chlordiazepoxide-D5 is a stable-labeled internal standard used for the quanitfication of Chlordiazepoxide. Chlordiazepoxide, sold under brand names such as Librax and Librium, is a long-acting benzodiazepine containing anxiolytic, sedative, and hypnotic properties. It assists in treating anxiety, insomnia, and symptoms of drug and alcohol withdrawal. Chlordiazepoxide-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.