Zinc peroxide
Crystal structure | ||||||||||||||||
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__ Zn 2+ __ O 2 2− | ||||||||||||||||
General | ||||||||||||||||
Surname | Zinc peroxide | |||||||||||||||
Ratio formula | ZnO 2 | |||||||||||||||
Brief description |
white to yellowish, odorless solid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 97.39 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
1.57 g cm −3 |
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Melting point |
decomposes when heated |
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solubility |
soluble in water with hydrolysis |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Zinc peroxide is a whitish to light yellow solid and a strong oxidizing agent .
Extraction and presentation
Zinc peroxide can be obtained by reacting zinc oxide with hydrogen peroxide , the product containing water of crystallization . Production from other zinc salts and hydrogen peroxide is also possible. Anhydrous zinc peroxide is obtained by reacting zinc nitrate with potassium peroxide in liquid ammonia. The latter two methods, however, result in a less pure product.
properties
The chemical properties of zinc peroxide are similar to those of magnesium peroxide .
At temperatures above 150 ° C, zinc peroxide decomposes into zinc oxide and oxygen; at 212 ° C this reaction is explosive:
use
Zinc peroxide is used in the manufacture of lead, antimony and barium-free SINTOX primers. Zinc peroxide is also a component of tooth whitening products.
safety instructions
As a strong oxidizing agent, zinc peroxide is fire-promoting. Mechanical effects or heating can lead to explosive reactions; mixtures with flammable substances also tend to - possibly explosive - self-ignition.
Individual evidence
- ↑ a b c d e f g Entry on zinc peroxide in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
- ^ A b F. Albert Cotton (Ed.): Progress in Inorganic Chemistry . tape 4 . John Wiley & Sons, 2009, ISBN 978-0-470-16655-0 , pp. 146 (English).
- ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , pp. 47-48.
- ↑ blv.admin.ch: Dental bleach , March 13, 2013.
- ↑ Zinc Peroxide at cameochemicals.noaa.gov, accessed January 27, 2019.