Sodium peroxide formula, also called as Disodium dioxide formula or Solozone formula is explained in this article. The octahydrate is made by the treatment of sodium hydroxide and hydrogen peroxide together. The molecular formula of Sodium peroxide is Na2O2.Disodium dioxide is a granular solid that is yellow-white to yellow in color. When it's mixed with any combustible material it readily ignites by heat, contact with moisture, or by friction. When exposed to heat for a longer duration it undergoes vigorous decomposition. On a bigger scale, Disodium dioxide can be prepared by reacting metallic sodium with oxygen at a temperature range of 130 to 200 °C.