Biuret

Encyclopedia : B : BI : BIU : Biuret

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Biuret
Systematic name	N-(1-aminovinyl)ethene-1,1-diamine
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(NC(N)=C)=C
CAS number	[108-19-0]
[Chemical infoboxDisclaimer and references]

Biuret is a 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 decomposing 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 a chemical test for proteins not because the reagent contains biuret but because both biuret and proteins have the same response to copper.

See also

• Related compounds triuret and cyanuric acid

External links

• [MSDS Biuret]

• For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see [Chemical sources].

 

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