The systematic name of Dicerium trioxide is Cerium oxide (Ce₂O₃). With the CAS registry number 1345-13-7 and EINECS 215-718-1, it is also named as Cerium sesquioxide. The other registry numbers are 127386-24-7, 162524-85-8, 163912-29-6 and 202325-43-7. It is gold-yellow solid which is insoluble in water and hydrochloric acid, soluble in sulfuric acid, and not easily soluble in inorganic acid.

The other characteristics of this product can be summarized as: (1)#H bond acceptors: 3; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 2; (4)Polar Surface Area: 43.37 Å²; (5)Density: 7.132 g/L ; (6)Melting point: 2600 °C.

Preparation of Dicerium trioxide: It can be obtained by the reduction of cerium(IV) oxide with hydrogen at approximately 1,400 °C (2,552 °F).

Uses of Dicerium trioxide: It is mainly used as glass bleaching agent and polishing agent. It is also the raw material in the production of metal cerium. What's more, it can be used as exhaust catalysts. For example, it is used as a catalytic converter for the minimisation of CO emissions in the exhaust gases from motor vehicles. When oxygen is short, cerium(IV) oxide is reduced by carbon monoxide to cerium(III) oxide: 2 CeO₂ + CO → Ce₂O₃ + CO₂. When oxygen is surplus, the process is reversed and cerium(III) oxide is oxidized to cerium(IV) oxide: 2 Ce₂O₃ + O₂ → 4 CeO₂.

People can use the following data to convert to the molecule structure. 
1. SMILES:O=[Ce]O[Ce]=O
2. InChI:InChI=1/2Ce.3O/rCe2O3/c3-1-5-2-4
3. InChIKey:BMMGVYCKOGBVEV-UHTLZWSVAP

The following are the toxicity data which has been tested.