Neutralizing agents include sodium hydroxide and sodium carbonate. Reactions of barium hydroxide with ammonium salts are strongly endothermic. Magnesium oxide is produced by the calcination of magnesium carbonate or magnesium hydroxide. Heating alkyl halides with sodium hydroxide or water gives alcohols. The osteoblast then deposits calcium phosphate which is hardened by hydroxide and bicarbonate ions. Alkaline cleaning agents contain strong bases like sodium hydroxide or potassium hydroxide. Storage over sodium hydroxide precipitates the intermediate ether hydroperoxides. It dissolves in concentrated sodium hydroxide. The resulting product is then neutralized through the addition of sodium hydroxide or sodium carbonate. Disposal by using dilute solution of alkali hydroxide is recommended. Silicon is attacked by bases such as aqueous sodium hydroxide to give silicates. It is made by treating slaked lime with concentrated sodium hydroxide solution. Hydrolysis converts NaH into sodium hydroxide (NaOH), a caustic base. Water spontaneously ionizes into hydroxide anions and hydronium cations. It forms salts upon treatment with bases such as sodium hydroxide.