Desvenlafaxine hydrochloride is a selective serotonin and norepinephrine reuptake inhibitor (SNRI) used as an active pharmaceutical ingredient (API) in the development of antidepressants. It is the hydrochloride salt of desvenlafaxine, the major active metabolite of venlafaxine, with the chemical formula C₁₆H₂₅NO₂·HCl and a molecular weight of 299.84 g/mol. This compound is primarily employed in pharmaceutical manufacturing and research for treating major depressive disorder (MDD) by modulating neurotransmitter levels in the brain. It offers a non-selective SNRI mechanism, making it suitable for formulations targeting mood disorders, anxiety, and related conditions. Available in high purity (≥98%), it is ideal for laboratory synthesis, drug development, and quality control applications. Not intended for direct human consumption; handle with appropriate safety precautions.