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'Biuret'
Skeletal formula of biuret Space-filling model of biuret
Systematic name
Other names	2-imidodicarbonic diamide, carbamylurea, imidodicarbonic diamide, allophanamide
Chemical formula	C2H5N3O2
Molecular mass	103.080 g/mol
Density	x.xxx g/cm3
Melting point	186–189 °C (decomposes)
Boiling point	xx.x °C
SMILES	NC(=O)NC(N)=O
CAS number	[108-19-0]

'Biuret' is a condensation compound of urea, equivalent to two molecules of urea less one of ammonia. It is a white solid soluble in hot water and decomposes at 186–189 °C. The parent compound can be prepared by heating urea above the melting point at which temperature ammonia is expelled.
: 2 CO(NH₂)₂ → H₂N-CO-NH-CO-NH₂ + NH₃ ↑
'A biuret' is also a functional group and a class of organic compounds with the general structure RHN-CO-NR-CO-NHR where R is an organic residue. Biurets can be prepared by trimerization of isocyanates. For example the trimer of 1,6-hexamethylene diisocyanate is also known as HDI-biuret.
The biuret reagent is used in the biuret protein assay, a chemical test for proteins not because the reagent contains biuret but because both biuret and proteins have the same response to copper.

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See also

External links

See also

Related compounds:

★ triuret

★ cyanuric acid

External links

★ MSDS Biuret