Metoprolol EP Impurity E with CAS No: 163685-38-9 is an impurity standard of Metoprolol. Metoprolol is a medication classified as a beta-blocker. It is commonly prescribed to treat various cardiovascular conditions and manage certain medical conditions.Metoprolol is available in different forms, including oral tablets (immediate-release and extended-release), intravenous injections for acute conditions, and combination medications with diuretics or other antihypertensive drugs. Buy high quality Metoprolol EP Impurity E from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Metoprolol EP Impurity E