Cerium(III) oxide

Cerium(III) oxide, also called cerium sesquioxide, is a chemical compound made of cerium and oxygen. It has the chemical formula .

 Uses 
Cerium(III) oxide can react with oxygen in the air to make cerium(IV) oxide. This is used to reuse the cerium(IV) oxide catalyst in catalytic converters.

 References 

Category:Oxides
Category:Lanthanide compounds