Ephedrine.HCl (hydrochloride) is an amphetamine often used to prevent low blood pressure and weight gain. It is a precursor for the production of methamphetamine.Ephedrine 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. Ephedrine HCl. is a list 1 product.