Biuret
| Names | |
|---|---|
| IUPAC name
Carbamoylurea
| |
| Preferred IUPAC name
2-Imidodicarbonic diamide | |
| Systematic IUPAC name
(Carbamoylamino)methanamide | |
| Other names
Allophanamide
Carbamylurea Allophanic acid amide Allophanimidic acid N-Carbamoylaminomethanamide Ureidoformamide Imidodicarbonic diamide | |
| Properties | |
| C2H5N3O2 | |
| Molar mass | 103.08 g/mol |
| Appearance | White crystalline solid |
| Odor | Odorless |
| Density | 1.456 g/cm3 (at 20 °C) |
| Melting point | 190 °C (374 °F; 463 K) (decomposes) |
| Boiling point | 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)[1][2][3] | |
| Solubility | Soluble in alcohol Slightly soluble in diethyl ether |
| Thermochemistry | |
| Std molar
entropy (S |
146.1 J·K−1·mol−1 |
| Std enthalpy of
formation (ΔfH |
−565.8–−561.6 kJ·mol−1 |
| Hazards | |
| Safety data sheet | CDH Fine Chemical |
| Related compounds | |
| Related compounds
|
Urea |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
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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 [4]
Contents
Properties
Chemical
Biuret is prepared by the thermally catalyzed condensation of molten urea to biuret and ammonia.
It is not to be confused with Biuret reagent, a protein testing solution. Biuret gives a positive result with Biuret reagent, wherefore the name.
Physical
Availability
Biuret can be found as a contaminant in urea-based fertilizers.
Preparation
Biuret can be made through thermal decomposition of urea.
Projects
- Make biuret hydrochloride
- Make biuret nitrate
Handling
Safety
Biuret is practically non-toxic and it's even used as non-protein nitrogen food for livestock.
Powdered biuret is irritant.
Storage
In closed bottles, away from acidic vapors.
Disposal
No special disposal is required. If not contaminated with hazardous materials, can be dumped in ground as fertilizer.
References
- ↑ 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
- ↑ https://en.wikipedia.org/wiki/Biuret
