http://www.easchem.com/en/products/Cerium+Oxide.html Cerium dioxide;Cerium(IV) oxide,(99.998% Ce); ceric oxide coating quality balzers; Ceriumoxideyellowpowder; Cerium (IV) oxide; CeriumoxideREO; Cerium(IV) oxide; cerium(4+); oxygen(2-) CAS Number1306-38-3 Molecular FormulaCeO 2 Molecular Weight172.1148 EINECS215-150-4 AppearanceWhite To Light Yellowish Powder Density7.132 Melting Point2600ºC Boiling Point3500 ° C ITEM CeO2/TREO(%,min) TREO(%,min) RE Impurities(%/TREO,Max): La2O3:0.009 Pr6O11:0.005 Nd2O3:0.001 Sm2O3:0.001 Y2O3:0.001 Non-Re Impurities(%,Max): Fe2O3:0.0026 SiO2:0.004 CaO:0.0016 Cl-:0.049 SO42-:0.006 L.O.I:0.59%