Nomenclature
CAS number: 1306-38-3
Ceria.
CeO
2; mol wt 172.11.
Ce 81.41%, O 18.59%.
Description and references
Prepn from Ce salts: Duval, Anal. Chim. Acta 1, 341 (1947);
other prepns: Warf, US 2564241 (1951 to USAEC); Wilke, Z. Anorg. Allg. Chem. 330, 164 (1964). Purification:
Wetzel in Handbook of Preparative Inorganic
Chemistry vol. 2, G. Brauer, Ed. (Academic
Press, New York, 2nd ed., 1965) pp 1132-1135. Review:
Davis, Wayman, Can. Chem. Process Ind. 29, 230 (1945). Toxicity data: C. E. Lambert et
al., J. Am. Coll. Toxicol. 12, 617 (1993).
Properties
Heavy powder or cubic crystals; white if pure,
but usually pale yellow; traces of lanthanum, praseodymium, etc.,
give a pink to reddish-brown color. Practically insol in water, acids.
LD50 orally in
rats: >5.0 g/kg (Lambert).Use
Polishing and decolorizing glass; as opacifier for
vitreous enamels; in heat-resistant alloy coatings; in coatings for
infrared filters to prevent reflection; in analysis for Ce and oxidimetry;
as catalyst for organic reactions.