| IUPAC name
| Preferred IUPAC name
| Systematic IUPAC name
| Other names
Allophanic acid amide
|Molar mass||103.08 g/mol|
|Appearance||White crystalline solid|
|Density||1.456 g/cm3 (at 20 °C)|
|Melting point||190 °C (374 °F; 463 K) (decomposes)|
| 1.23 g/100 ml (at 0 °C)|
2.01 g/100 ml (at 25 °C)
4.59 g/100 ml (at 40 °C)
7.0 g/100 ml (at 50 °C)
17.5 g/100 ml (at 70 °C)
20.0 g/100 ml (at 75 °C)
53.5 g/100 ml (at 105.5 °C)
|Solubility|| Soluble in alcohol|
Slightly soluble in diethyl ether
Std enthalpy of
|Safety data sheet||CDH Fine Chemical|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Biuret is a chemical compound with the chemical formula C2H5N3O2. It is also known as carbamylurea. It is the result of condensation of two molecules of urea and is a problematic impurity in urea-based fertilizers 
It is not to be confused with Biuret reagent, a protein testing solution. Biuret gives a positive result with Biuret reagent, wherefore the name.
Biuret can be found as a contaminant in urea-based fertilizers.
Biuret can be made through thermal decomposition of urea.
- Make biuret hydrochloride
- Make biuret nitrate
Biuret is practically non-toxic and it's even used as non-protein nitrogen food for livestock.
Powdered biuret is irritant.
In closed bottles, away from acidic vapors.
No special disposal is required. If not contaminated with hazardous materials, can be dumped in ground as fertilizer.
- de Malde; Chimica e l'Industria (Milan, Italy); vol. 38; (1956); p. 571-574
- Rollet; Cohen-Adad; Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences; vol. 232; (1951); p. 2214,
- The Merck Index. 9th ed. Rahway, New Jersey: Merck & Co., Inc., 1976., p. 170