Absolute alcohol

From Biocrawler, the free encyclopedia.

Absolute alcohol or dehydrated alcohol is anhydrous pure ethanol, (C₂H₅OH) containing no more than one percent water.

It is not possible to obtain absolute alcohol by simple fractional distillation, because a mixture containing at least 95.4% alcohol and 5.6% water becomes a constant boiling mixture (an azeotropic mixture). To obtain 100% pure alcohol a small quantity of benzene is added to rectified spirit and the mixture is then distilled. Absolute alcohol is obtained in third fraction that distills over at 351.3°K (78.2°C).

There is also an absolute alcohol production process by dehydration using glycerine.

External links

• Specifications (http://www.distill.com/specs/US-2.html)
• Safety data (http://ptcl.chem.ox.ac.uk/MSDS/ET/ethyl_alcohol.html)fr:Alcool absolu

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Absolute_alcohol (http://en.wikipedia.org/wiki/Absolute_alcohol) version history (http://en.wikipedia.org/w/index.php?title=Absolute_alcohol&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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