[CAS Number 524713-57-3] Dextrorphan-D3 is an internal standard used for the quantification of dextrorphan. Dextrorphan is a morphine alkaloid and a major metabolite of dextromethorphan. It acts as a cough suppressant and contributes to the psychoactive effects of dextromethorphan. Dextrorphan-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.