Strontium peroxide is an inorganic compound with the formula Sr O2 that exists in both anhydrous and octahydrate form, both of which are white solids. The anhydrous form adopts a structure similar to that of calcium carbide. It is typically a white or light yellow solid that can be formed by the reaction of strontium with oxygen or by other chemical processes.
Strontium peroxide has some interesting properties and is known to be used in various applications. It typically appears as a pale yellow to white solid. It is poorly soluble in water but can dissolve in acids to form strontium salts and hydrogen peroxide.
Properties
- Chemical formula: SrO2
- Molar mass: 119.619 g/mol
- Appearance: white powder
- Odor: odorless
- Density: 4.56 g/cm3 (anhydrous) 1.91 g/cm3 (octahydrate)
- Melting point: 215 °C (419 °F; 488 K) (decomposes)
- Solubility in water: slightly soluble
- Solubility: very soluble in alcohol, ammonium chloride, insoluble in acetone
Natural Occurrences
Strontium peroxide is not commonly found in significant quantities in nature. It is generally produced synthetically in the laboratory or in industrial settings. However, strontium compounds, such as strontium carbonate (SrCO₃) or strontium sulfate (SrSO₄), are found in nature, and strontium peroxide can be synthesized from these compounds.
Production
Strontium peroxide is produced by passing oxygen over heated strontium oxide. Upon heating in the absence of O2, it degrades to SrO and O2. It is more thermally labile than BaO2.
Industrial Production
Strontium peroxide is typically produced through the reaction of strontium compounds with oxygen, usually under controlled conditions or via electrochemical methods. It can also be formed by heating strontium salts in the presence of oxygen. The compound is mainly used in niche applications such as in the production of certain chemical reactions, including oxygen release reactions.
Uses
It is an oxidizing agent used for bleaching. It is used in some pyrotechnic compositions as an oxidizer and a vivid red pyrotechnic colorant. It can also be used as an antiseptic and in tracer munitions.
- Pyrotechnics: Strontium compounds, including strontium peroxide, are used in fireworks and flares for producing red flames.
- Oxygen generation: Strontium peroxide can be used in chemical oxygen generators, where it decomposes to release oxygen.
- Catalysis: It has some potential as a catalyst in various chemical processes, particularly in reactions involving oxygen.
Safety Considerations
Strontium peroxide, being an oxidizer, can react vigorously with flammable materials and reduce the risk of fire when handled improperly. It should be stored in cool, dry conditions, away from incompatible substances.
