Erbium metal Metals Lanthanum metal Cerium metal Praseodymium metal Neodymium metal Samarium metal Europium metal Gadolinium metal Terbium metal Dysprosium metal Holmium metal Erbium metal Thulium metal Ytterbium metal Lutetium metal Scandium metal Yttrium metal Erbium metal CAS # 7440-52-0 Molecular Formula Er Molecular Weight 382.56 gmol-1 3N (99.9%) 33% 33% 4N (99.99%) 66% 66% 5N (99.999%) 100% 100% Interested in this Product?YesNoGET A QUOTE