Clonazepam-D4 is a stable-labeled internal standard used for the quantification of clonazepam. Clonazepam, advertised under the brand name Klonopin, is classified as a benzodiazepine. Clonazepam is predominately used as an anticonvulsant, but it can also be used to treat seizures, panic disorders, and anxiety. Clonazepam-D4 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.