Nitrourea

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Nitrourea
Names
IUPAC name
N-Nitrourea
Other names
1-Nitrourea
N-Nitrocarbamide
Properties
CH3N3O3
Molar mass 105.053 g/mol
Appearance Colorless solid
Odor Odorless
Density 1.73 g/cm3
Melting point 158 °C (316 °F; 431 K) (decomposes)[3]
Boiling point Decomposition
20 g/100 ml[1]
Solubility in acetone 41 g/100 ml[2]
Solubility in ethanol 17.2 g/100 ml
Solubility in methanol 43 g/100 ml
Vapor pressure ~0 mmHg
Hazards
Safety data sheet None
Related compounds
Related compounds
Nitroguanidine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Nitrourea (NU), also known as N-nitrourea is an organic chemical compound, a powerful explosive material. It has the formula H2NC(O)NH(NO2).

Properties

Chemical

Nitrourea hydrolyzes to form nitroamide and isocyanic acid.

Nitrourea burns when ignited and may explode under the right circumstances.

Physical

Nitrourea is a hygroscopic white solid, soluble in water.

Explosive

Nitrourea is mildly sensitive to heat and shock, may explode under exposure to intense heat or fire.

Availability

Nitrourea is not sold by chemical suppliers and has to be made in situ.

Preparation

Nitrourea can be prepared via dehydration of urea nitrate with concentrated sulfuric acid at temperatures below 0 °C, under stirring.[4]

Another route described uses glacial acetic acid and acetic anhydride.[5]

Projects

  • Pyrotechnic demonstrations

Handling

Safety

Nitrourea is a powerful explosive material and should be handled with care.

Storage

Should not be stored for long periods of time, as it's prone to hydrolysis.

Disposal

Should be diluted and hydrolyzed.

References

  1. http://energetics.chm.uri.edu/system/files/UN%20and%20NU.pdf
  2. http://energetics.chm.uri.edu/system/files/UN%20and%20NU.pdf
  3. http://energetics.chm.uri.edu/system/files/UN%20and%20NU.pdf
  4. http://www.orgsyn.org/demo.aspx?prep=CV1P0417
  5. C.P. Spaeth, N.J. Woodbury, Preparation of Nitrourea. US Patent Feb. 23, 1943

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