Radium hydroxide is an inorganic compound of radium, hydrogen, and oxygen with the chemical formula .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:left}.mw-parser-output sub.template-chem2-sub{font-size:80%;vertical-align:-0.35em}.mw-parser-output sup.template-chem2-sup{font-size:80%;vertical-align:0.65em}Ra(OH)2. Stability constant of aqueous RaOH+ ion pair at zero ionic strength is equal to 5.
Radium hydroxide forms colorless crystals that dissolve in water better than does barium hydroxide, and has more basic properties.
The compound forms a hydrate of the composition Ra(OH)2·8H2O.
Radium hydroxide is a caustic, toxic, and corrosive substance. Significantly more toxic than are barium hydroxide (Ba(OH)2) and strontium hydroxide (Sr(OH)2).
