furan


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Related to furan: furan resin

furan:

see furfuralfurfural
or furfuraldehyde
[Lat.,=bran], C4H3OCHO, viscous, colorless liquid that has a pleasant aromatic odor; upon exposure to air it turns dark brown or black. It boils at about 160°C;.
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Furan

 

(furfuran), a heterocyclic compound; a colorless liquid, with a chloroform odor and a boiling point of 31.33°C. A large group of organic compounds, many of which are of practical

value, are derived from furan, for example, furfural, tetrahydrofuran, and 2-methylfuran. Furan is obtained primarily from furfural. It is an intermediate product in the synthesis of tetrahydrofuran; it is also used in the preparation of pyrrole, by a reaction with NH3 in the presence of Al2O3.

furan

[′fyu̇r‚an]
(organic chemistry)
One of a group of organic heterocyclic compounds containing a diunsaturated ring of four carbon atoms and one oxygen atom.
C4H4O4 The simplest furan type of molecule; a colorless, mildly toxic liquid, boiling at 32°C, insoluble in water, soluble in alcohol and ether; used as a chemical intermediate. Also known as furfuran; tetrol.
References in periodicals archive ?
A number of studies have been done on furan and 2-methyltetrahydrofuran (MTHF) which are potential biomass fuels.
Scientists led by Javier Santos, a professor at the Department of Analytical Chemistry at the University of Barcelona said in the journal <em>Food Chemistry</em> that higher concentrations of furans are found in espresso (43a[euro]146 nanograms per mililitre) than in coffee made in drip coffee makers, with normal coffee getting higher readings (20a[euro]78 ng/ml) than decaffeinated coffee (14a[euro]65 ng/ml).
Our study was limited, for it focused on only two select congeners out of the 75 dioxin and 135 furans that exist, and only looked at the sum of 17 dioxin/furan congeners to evaluate total TEQs.
The formation of furan was correlated with the pH, sugar content, titratable acidity and ascorbic acid content of the produce.
After processing, samples for dioxin and furan analysis were submitted to the analytical laboratory on July 19, 2004.
According to analytical data posted on FDA's web site and presented as exploratory data, furan may be present in a wide variety of foods at extremely low levels ranging from a few parts per billion (ppb) to approximately 100 ppb.
Some animal data suggests that high levels of furan exposure might have a carcinogenic effect in humans, but its true effects in humans, especially at such very low levels, are not known, the FDA said.
Previous studies have determined that RGS detection limits in sediment are 8 pg/g for dioxin, 63 pg/g for furan, 6.
The work (2-5) mainly consists of polymerization of bisfuran or furan resin with bismaleimide derivative.
s list of toxic polluters; the agency found significant quantities of lead, cadmium, chromium, arsenic, dioxin and furan contamination in its cement dust.