[CAS Number 1189650-18-7] N-Desmethylcitalopram-D3.hydrochloride is a stable-labeled internal standard used for the quantification of n-desmethylcitalopram.HCl. N-Desmethylcitalopram.HCl is an active metabolite of the antidepressant drug citalopram. Similar to citalopram, n-desmethylcitalopram.HCl is an SSRI reuptake inhibitor. N-Desmethylcitalopram-D3.HCl 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.