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Cerium Oxide

cerium-99.9 image

Cerium Oxide 99.9% Min. Grade


Cerium (IV) oxide; CeO2; ceric oxide; ceria; cerium oxide; cerium dioxide; A 1; A 1(ceria); CESL 15N; Cepol 120; Cepol 302; Ceria; Ceria (CeO2); Ceric oxide; Ceric oxide (CeO2); Cerico; Cerico H; Cerium dioxide; Cerium dioxide (CeO2); Cerium oxide; Cerium(4+) oxide; Cerium(IV) oxide


Cerium oxide usually appears as a light yellow powder. It is insoluble in water and moderately soluble in strong mineral acids. CeO2 is slightly hygroscopic and will absorb small amounts of moisture and CO2 from the atmosphere.

Molecular Weight (g/mol.) : 172.1142

Apparent Density (g/cm3) : 7.65 g/cm3 as a solid

Specific Gravity : 7.28

Melting Point (°C) : Approx. 2500°

Boiling Point (°C) : 3500 °C

Odor : Odorless

Acute Health Hazard : Yes

Mohs Hardness @ 20 °C : 6

Solubility In Water : Insoluble

Appearance : Light yellow powder

Crystallography : Cubic, face centered


Glass and Ceramics:

Cerium oxide is used to polish glass surfaces, having largely replaced jewelers rouge in the glass industry. Cerium compounds are also used in the manufacture of glass and enamels, both as a component and as a decolourizer. Cerium in combination with titanium gives glass a golden yellow colour. Cerium oxide (Ce2O3 and CeO2) is also a component of the walls of self-cleaning ovens

In LED's:

Cerium combined with yttrium turns blue light into white light. Cerium oxide, in combination with tin oxide (SnO) is used for UV absorption for solar panels. Cerium is also used to stabilize zirconia and for alumina ceramics in catalytic converters. It is also utilized in dental ceramics

Alloys and Metals:

Cerium is alloyed with iron to make nodular iron to improve machine ability of automotive power-train components


Cerium oxide is used as a catalytic converter to reduce carbon monoxide emissions in the exhaust gases from motor vehicles. Cerium additives to diesel fuel enable the fuel to burn more cleanly, with less resulting air-pollution.