Category:
Active Pharmaceutical Ingredients
Diphenhydramine HCl (CAS 147-24-0, C17H21NO·HCl) is a first-generation ethanolamine antihistamine synthesized via condensation of diphenylmethanol with dimethylaniline. It serves as a critical API for treating allergic reactions and insomnia.
Strictly limit dosage to avoid CNS depression. Store in cool, dry conditions below 25°C away from light. Handle with PPE to prevent respiratory irritation.