Praseodymium(III) hydroxide is an inorganic compound with a chemical formula Pr(OH)<sub>3</sub>.
The reaction between ammonia water and praseodymium(III) nitrate produces praseodymium(III) hydroxide:
Praseodymium(III) hydroxide can react with acid and produce praseodymium salts:
Pr(OH)<sub>3</sub> + 3CH<sub>3</sub>COOH forms Pr(CH<sub>3</sub>CO<sub>2</sub>)<sub>3</sub> + 3H<sub>2</sub>O;
Praseodymium(III) hydroxide + Acetic acid forms praseodymium(III) acetate and water.