... oxide,Lanthanum Cerium oxide, 1um CeO2,cerium polishing powder,La-ce Cerium Oxide CeO2,CAS No.: 1306- ... rare earth metal cerium. It is a pale yellow-white powder with the chemical formula CeO2.Cerium(IV) ... hydroxide.chemical data sheet:cerium oxide 99.95%. (yellow cerium oxide)TREO(total rare earth oxides):98% ... .0% max.cerium oxide 99.995%. (light yellow cerium oxide)TREO(total rare earth oxides):99% min ...