cerium oxide 1,high purity:99%--99.999% 2,wide range of uses 3,quality best and ... .0005Cl- <0.0050L.O.I <1.00TERO >99.00%CeO2/REO ≥ 99.99% Description :Cerium Oxide is a kind of red or light yellowish ... very important in the applications of Rare Earth fluorescent cerium oxide rare earth,rare earth cerium oxide,Cerium oxide 99.99% to 99.9999%