Used as a precursor in the synthesis of cerium-based catalysts for automotive exhaust systems, where it helps reduce harmful emissions by promoting oxidation of carbon monoxide and unburned hydrocarbons. Also serves as a starting material for other cerium compounds in catalysis industries and high-temperature resistant ceramics.

Employed in analytical chemistry as a reagent for redox titrations to detect reducing agents, including quantification of iron and other substances, due to the ability of cerium(III) to be oxidized to cerium(IV).

Applied in the preparation of cerium-doped materials for phosphors and solid oxide fuel cells, enhancing ionic conductivity.

Utilized in research for studying cerium ion behavior in aqueous solutions, its role in corrosion inhibition, and the magnetic and optical properties of rare earth materials, owing to interesting electronic behavior in hydrated salt forms.