[CAS Number 205446-21-5] Benzoylecgonine-D8 is a stable-labeled internal standard used for the quantification of benzoylecgonine. Benzoylecgonine is the primary metabolite and major biomarker of cocaine. Therefore, its presence in urine can determine cocaine consumption. Benzoylecgonine-D8 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. Special storage & shipping requirements.