Citalopram is a selective serotonin reuptake inhibitor (SSRI) class of compounds, primarily utilized as an active pharmaceutical ingredient (API) in the synthesis of antidepressants for treating major depressive disorder (MDD), generalized anxiety disorder (GAD), panic disorder, and off-label for obsessive-compulsive disorder (OCD) and post-traumatic stress disorder (PTSD). As a high-purity chemical reagent (>98.0% by GC), it appears as a white to almost white powder or crystal, conforming to structural standards via infrared spectrum and NMR. This product is intended for laboratory research, pharmaceutical development, and analytical applications, not for direct human consumption. Handle with care following safety guidelines.