1990. Ceric Sulfate

Nomenclature

CAS number: 13590-82-4
CeO8S2; mol wt 332.24.
Ce 42.17%, O 38.52%, S 19.30%.
Ce(SO4)2.

Description and references

Prepd by heating CeO2 with concd H2SO4: Vanino, Handbuch der Pr"aparativen Chemie vol. 1 (Stuttgart, 3rd ed., 1925) p 755. Review: Smith, Ceric Sulfate (G. Frederick Smith Chem. Co., Columbus, Ohio, 2nd ed., 1935) 51 pp. The commercial salt usually contains small amounts of associated rare earths.

Derivative

Tetrahydrate.

Properties

Yellow to orange powder or orthorhombic crystals. On heating loses water, becoming anhydr at 180-200°; dec above 350°, forming CeOSO4. Sol in a small quantity of water, but dec with much water with separation of a basic salt. Slowly sol in cold, more readily sol in hot mineral acids; sol in dil H2SO4.

Use

Oxidizing agent; analytical reagent; in radiation dosimeters.