Sodium peroxide

[6] Upon heating, the hexagonal form undergoes a transition into a phase of unknown symmetry at 512 °C.

[8] Commercially, sodium peroxide is produced from the elements in a two-stage process.

[10] It may also be produced by passing ozone gas over solid sodium iodide inside a platinum or palladium tube.

The platinum or palladium catalyzes the reaction and is not attacked by the sodium peroxide.

The octahydrate can be produced by treating sodium hydroxide with hydrogen peroxide.

Sodium peroxide
Sodium peroxide
NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorus Special hazard W+OX: Reacts with water in an unusual or dangerous manner AND is oxidizer