2Na2O2

2Na2O2 is the chemical formula representing two formula units of sodium peroxide. Sodium peroxide (Na2O2) is an inorganic compound that consists of sodium cations and the peroxide dianion (O2^2−). In the solid state it is a white to grayish crystalline material and, as an oxidizer, can support combustion of organic materials under certain conditions.

Sodium peroxide is highly reactive, especially with water and acids. It reacts with water to produce sodium hydroxide and hydrogen peroxide: Na2O2 + 2 H2O → 2 NaOH + H2O2. The reaction is exothermic and can be vigorous. The compound can release oxygen upon decomposition when heated and is incompatible with reducing agents, fuels, and many organic substances.

Preparation and use: Sodium peroxide is typically prepared by direct oxidation of sodium metal in oxygen, or by oxidation of sodium oxide under controlled conditions. In industry it is employed as an oxidizer and as an oxygen source in certain chemical processes and devices where a solid peroxide source is desirable.

Safety: The material is an oxidizer and should be handled with care. It is corrosive, can cause burns, and reacts violently with moisture and acids, releasing hydrogen peroxide. It should be stored in a tightly closed container in a cool, dry, well-ventilated place away from organic materials and acids. Protective equipment should be used, and disposal should follow local regulations for inorganic oxidizers.

Note: The notation 2Na2O2 simply denotes two formula units of sodium peroxide and is not a distinct chemical compound by itself.