Cerium(IV) hydroxide, also known as ceric hydroxide, is an inorganic compound with the chemical formula Ce(OH)4.

It is a yellowish powder that is insoluble in water but soluble in concentrated acids.

[1] Cerium(IV) hydroxide can be produced by reacting cerium(III) carbonate and acetic acid, then oxidizing it with hydrogen peroxide in base.

The reactions are:[2] The net equation is： If using cerium(III) nitrate as ingredient, a similar reaction occurs:[3] It might also prepared by addition of sodium hydroxide or ammonium hydroxide to a Ce4+ solution, being obtained as a gelatinous precipitate described as CeO2·xH2O, (x = 0.5–2).

Boiling an insoluble Ce4+ salt in NaOH gives granular Ce(OH)4.