Calcium peroxide

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Calcium peroxide
Other names E930
CAS number 1305-79-9
Molecular formula CaO2
Molar mass 72.08 g/mol
Appearance white to yellow powder or solid
Density 2.9 g/cm3
Melting point

~200 dec °C

Boiling point

- °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Calcium peroxide (CaO2) is a solid peroxide with a white or yellowish color. For all practical purposes calcium peroxide is insoluble in water but will dissolve in acid to form hydrogen peroxide. When in contact with water it will immediately begin to decompose releasing oxygen.


Calcium peroxide is manufactured to varying specifications and purity and can be used in different areas of industry and agriculture. In agriculture it is used as an oxygen fertilizer, and is also used in the presowing treatments of rice seed. Also, calcium peroxide has found use in the aquaculture industry as it is used to oxygenate and disinfect water, and in the ecological restoration industry as it is used in the treatment of soils. Calcium Peroxide is used in a similar manner to magnesium peroxide for environmental restoration programs. It is used to restore soil and groundwater contaminated with petroleum hydrocarbons by stimulating aerobic microbial degredation of the contaminants in a process known as Enhanced In-Situ Bioremediation.

As a food additive it has the E number E930 and is used as flour bleaching agent and improving agent.

Template:E number infobox 920-929Template:Inorganic-compound-stub

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