Urea peroxide

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urea peroxide
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.

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.

Forms dangerous peroxides with ethers and ketones.

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