[CAS Number 1184984-06-2] Hydroxybupropion-D6 is a stable-labeled internal standard used for the quantification of hydroxybupropion. Hydroxybupropion is a major metabolite of the antidepressant and smoking cessation drug bupropion. Hydroxybupropion-D6 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.