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Encyclopedia > Biuret

Biuret is a chemical compound with the chemical formula C2O2N3H5. It is a white solid with a melting point of 186 - 189 °C. The parent compound can be prepared by heating urea above the melting point at which temperature ammonia is expelled. A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... hjkhj:See also [[ch Link titleemical symbol]]. A chemical formula allasdfsdf crapInsert non-formatted text herecompkjjkjItalic textItalic text--69. ... The degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701–1744), who first proposed a similar system in 1742. ... Urea is an organic compound of carbon, nitrogen, oxygen and hydrogen, with the formula CON2H4 or (NH2)2CO and the structure shown right: Urea is also known as carbamide, especially in the recommended International Non-proprietary Names (rINN) in use in Europe. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... Ammonia is a compound of nitrogen and hydrogen with the formula NH3. ...

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. In ecology functional groups are collections of organisms based on morphological, physiological, behavioral, biochemical, or environmental responses or on trophic criteria. ... An organic compound is any member of a large class of chemical compounds whose molecules contain carbon, with exception of carbides, carbonates and carbon oxides. ... In chemistry a trimer is a reaction product of three identical molecules. ... Isocyanate is the chemical group of atoms -N=C=O (1 nitrogen, 1 carbon, 1 oxygen), as opposed to cyanate, -O-C≡N, which is formed from cyanogen in the normal -ate manner. ...


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. The Biuret Reagent is made of sodium hydroxide and copper sulfate. ... In chemistry, a chemical test is qualitative or semi-quantitative procedure designed to prove the existence of a chemical compound or chemical group with the aid of a specific reagent. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance copper, metallic Atomic mass 63. ...


See also

Cyanuric acid or 1,3,5-triazine-2,4,6-triol is an organic chemical compound with the chemical formula C3H3N3O3. ...

External links

  • MSDS Biuret

  Results from FactBites:
 
MINOR CONTAMINANTS OF BIURET AND CYANURIC ACID AS ADDITIVES FOR PEACH FRUIT THINNING WITH UREA (256 words)
Biuret and cyanuric acid (CA) are phytotoxic minor contaminants found in synthetic urea.
The objective of the present study was to evaluate the contribution of biuret and CA to the fruit thinning effect of urea.
A concentration of 160 ppm of biuret in 8% urea solution caused some synergistic effect which was not increased further by addition of higher amounts of biuret.
Preparation of biuret-containing polyisocyanates - Patent 7022874 (2432 words)
A process as claimed in claim 1, wherein the biuretizing agent (b) is a tertiary alcohol or a mixture of a tertiary alcohol and up to 80 mol % of water based on the sum of the components of the mixture.
The difficulty of preparing homogenous mixtures of water and the isocyanate means that in the course of this reaction, in practice, local excesses of water always result in the formation of greater or lesser proportions of insoluble polymeric urea-containing compounds which are deposited in the reaction vessel or in the off-gas space.
In accordance with the invention, the isocyanate (a) is reacted with the biuretizing agent (b) in the presence of catalytic amounts of a stabilizer (c).
  More results at FactBites »


 
 

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