furan

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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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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.