Cerium(III) oxide

  • Cerous oxide
  • Cerium trioxide
  • Cerium sesquioxide
Formula
Ce2O3
Description
Gray-green trigonal crystals.
Uses
Used as a component in incandescent gas mantles, as a hydrocarbon catalyst in self-cleaning ovesn and as a glass polishing agent.

Registry Numbers and Inventories.
CAS
1345-13-7
EC (EINECS/ELINCS)
215-718-1
RTECS
FK6657000
RTECS class
Other
Beilstein/Gmelin
11112 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ce2O3
Formula mass
328.24
Melting point, °C
1690
Density
6.86 g/cm3 (20 C)
Solubility in water
Insoluble
Thermal expansion
1.2E-5/K

Hazards and Protection.

Fire.
Fire potential
Ignites in at at 200 C.

Health.
Exposure effects
   Ingestion
Considered as non toxic except in enormous doses.
   Inhalation
May cause irritation. See ingestion.
   Skin
May cause irritation. See ingestion.
   Eyes
May cause irritation. See ingestion.

First aid
 
   Ingestion
Even though a substance may be considered non-toxic for the amount ingested or packaged, it should not be considered as non-toxic in any amounts.
   Inhalation
Although inhalation of common dust may not be considered toxic, it is certainly a hazard if there is inhalation of too many particles. Individuals should be removed from exposure to too high a concentration of even relatively non-toxic substances.
   Skin
Foreign materials spilled on the skin may not represent a toxic or irritation hazard in small quantities, but may produce adverse effects if applied in large quantities or if used over a significant period of time. Whenever possible, foreign materials should be removed from the skin with simple washing. Should skin irritation or erythema occur, a patient may wish to seek medical assistance.
   Eyes
Foreign materials in the eye may not cause a toxic reaction, but injury from a foreign body may occur. In such cases, the patient should be observed for eye irritation and should seek medical assistance if the irritation becomes significant.

Transport.