4'-(1-Hydroxy-2-(methylamino)propyl)methanesulfonanilide monohydrochloride 955-48-6 MJ 1998 Metalol hydrochloride [USAN] Methanesulfonamide, N-(4-(1-hydroxy-2-(methylamino)propyl)phenyl)-, monohydrochloride Methanesulfonanilide, 4'-(1-hydroxy-2-(methylamino)propyl)-, hydrochloride