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Calcium peroxide

Calcium peroxide
Other names	E930
Identifiers
CAS number	1305-79-9
Properties
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.

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Applications

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 similar to magnesium peroxide in clean up program for contaminated soil and underground water.

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

v • d • e

E numbers

Colours (E100–199) • Preservatives (E200–299) • Antioxidants & Acidity regulators (E300–399) • Thickeners, stabilisers & emulsifiers (E400–499) • pH regulators & anti-caking agents (E500–599) • Flavour enhancers (E600–699) • Miscellaneous (E900–999) • Additional chemicals (E1100–1599)

Waxes (E900–909) • Synthetic glazes (E910–919) • Improving agents (E920–929) • Packaging gases (E930–949) • Sweeteners (E950–969) • Foaming agents (E990–999)

L-cysteine (E920) • L-cystine (E921) • Potassium persulfate (E922) • Ammonium persulfate (E923) • Potassium bromate (E924) • Chlorine (E925) • Chlorine dioxide (E926) • Azodicarbonamide (E927) • Carbamide (E927b) • Benzoyl peroxide (E928)

Category: Disinfectants