Nom: Tretinoin (Vitamin A Acid, Retinoids) Alias: Tretinoin Other names: all-trans retinoic acid, retinoic acid, all-trans retinoic acid Molecular formula: C20H28O2 Molecular weight: MW 300.44 Apparence: yellow or light orange crystalline powder Content: 97.0–103.0% Quality standard: USP32 Category: Anti-dermal keratinization drugs, cell differentiation drugs Storage conditions: shading, sealed and preserved