Difference between revisions of "Urea peroxide"
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| pKa = | | pKa = | ||
| pKb = | | pKb = | ||
| − | | Solubility = | + | | Solubility = 500 |
| SolubleOther = | | SolubleOther = | ||
| Solvent = | | Solvent = | ||
| − | | VaporPressure = | + | | VaporPressure = 23.3 mm Hg ( 30 °C) |
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| Section3 = {{Chembox Structure | | Section3 = {{Chembox Structure | ||
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| − | Urea peroxide is a crystalline adduct composed of equal amounts of hydrogen peroxide and urea. It is used in commercial tooth-whiteners. | + | 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. |
==Properties== | ==Properties== | ||
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==Preparation== | ==Preparation== | ||
| − | Urea peroxide is prepared by combining | + | Urea peroxide is prepared by combining 3:2 molar quantities of hydrogen peroxide and urea. |
==Projects== | ==Projects== | ||
| Line 133: | Line 133: | ||
===Safety=== | ===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. | ||
===Storage=== | ===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=== | ===Disposal=== | ||
| + | Breaks down to urea and hydrogen peroxide in water. | ||
==References== | ==References== | ||
<references/> | <references/> | ||
===Relevant Sciencemadness threads=== | ===Relevant Sciencemadness threads=== | ||
| + | *<<http://www.sciencemadness.org/talk/viewthread.php?tid=23477 Synthesis of Carbamide Peroxide?>> | ||
Revision as of 02:37, 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 | |
| Vapor pressure | 23.3 mm Hg ( 30 °C) |
| 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
Physical
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.
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?>>
