Difference between revisions of "Urea peroxide"
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| pKa = | | pKa = | ||
| pKb = | | pKb = | ||
| − | | Solubility = 500 | + | | Solubility = 500 g/liter |
| SolubleOther = | | SolubleOther = | ||
| Solvent = | | Solvent = | ||
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| AutoignitionPt = | | AutoignitionPt = | ||
| ExploLimits = | | ExploLimits = | ||
| − | | ExternalMSDS = | + | | ExternalMSDS =https://www.reagentworld.com/products/msds2.asp?proid_2=22650 |
| FlashPt = | | FlashPt = | ||
| LD50 = | | LD50 = | ||
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==Properties== | ==Properties== | ||
===Chemical=== | ===Chemical=== | ||
| − | urea peroxide is a convenient | + | urea peroxide is a convenient replacement for 90% hydrogen peroxide in oxidation reactions. |
===Physical=== | ===Physical=== | ||
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Forms dangerous peroxides with ethers and ketones. | Forms dangerous peroxides with ethers and ketones. | ||
| + | |||
| + | Can be made to explode. | ||
===Storage=== | ===Storage=== | ||
Revision as of 02:55, 23 February 2016
| Properties | |
|---|---|
| CH6N2O3 | |
| Molar mass | 94.07 g·mol−1 |
| Appearance | White solid |
| Melting point | 75 to 91.5 °C (167.0 to 196.7 °F; 348.1 to 364.6 K) (decomposes) |
| 500 g/liter | |
| Vapor pressure | 23.3 mm Hg ( 30 °C) |
| Hazards | |
| Safety data sheet | https://www.reagentworld.com/products/msds2.asp?proid_2=22650 |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Urea peroxide is a crystalline adduct composed of equal amounts of hydrogen peroxide and urea. It is used in commercial tooth-whiteners, and to loosen impacted earwax. It is also used to make plastics.
Contents
Properties
Chemical
urea peroxide is a convenient replacement for 90% hydrogen peroxide in oxidation reactions.
Physical
Urea peroxide is a free flowing white powder.
Availability
97% urea peroxide is available from Sigma Aldrich.
Preparation
Urea peroxide is prepared by combining 3:2 molar quantities of hydrogen peroxide and urea.
Projects
Handling
Safety
Inhalation of dust causes irritation of nose from hydrogen peroxide formed when heated. Contact with eyes causes severe damage. Contact with moist skin causes temporary itching or burning sensation. Ingestion causes irritation of mouth and stomach.
Forms dangerous peroxides with ethers and ketones.
Can be made to explode.
Storage
Urea hydrogen peroxide is an oxidizing agent. Liable to spontaneous combustion when heated or in contact with organic materials. The contents of a screw-capped brown glass bottle spontaneously erupted after four years storage at ambient temperature. [MCA Case History No. 719]. Combustion may release Irritating ammonia gas.
Disposal
Breaks down to urea and hydrogen peroxide in water.
References
Relevant Sciencemadness threads
- <<http://www.sciencemadness.org/talk/viewthread.php?tid=23477 Synthesis of Carbamide Peroxide?>>
