butyric acid

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butyric acid

butyric acid or butanoic acid , CH ₃ CH ₂ CH ₂ CO ₂ H, viscous, foul-smelling, liquid carboxylic acid; m.p. about -5°C; b.p. 163.5°C. It is miscible with water, ethanol, and ether. It is a low molecular weight fatty acid that is present in butter as an ester of glycerol; the odor of rancid butter is due largely to the presence of free butyric acid. Butyric acid is used in the manufacture of plastics. Isobutyric acid, or 2-methylpropanoic acid, (CH ₃ ) ₂ CHCO ₂ H, is a geometric isomer of the butyric acid described above; it has different physical properties but similar chemical properties.

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"butyric acid." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 28 Nov. 2009 <http://www.encyclopedia.com>.

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butyric acid

A Dictionary of Food and Nutrition | 2005 | | Â© A Dictionary of Food and Nutrition 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

butyric acid A short‐chain saturated fatty acid (C4 : 0). It occurs as the triacylglycerol in 5–6% of butter fat, and in small amounts in other fats and oils. Also formed by intestinal bacterial fermentation of resistant starch, when it is possibly protective against the development of colo‐rectal cancer.

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DAVID A. BENDER. "butyric acid." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 28 Nov. 2009 <http://www.encyclopedia.com>.

DAVID A. BENDER. "butyric acid." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (November 28, 2009). http://www.encyclopedia.com/doc/1O39-butyricacid.html

DAVID A. BENDER. "butyric acid." A Dictionary of Food and Nutrition. 2005. Retrieved November 28, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-butyricacid.html

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butyric

The Concise Oxford Dictionary of English Etymology | 1996 | | Â© The Concise Oxford Dictionary of English Etymology 1996, originally published by Oxford University Press 1996. (Hide copyright information) Copyright

butyric (butyric acid, found in rancid butter) XIX. f. L. būtȳrum BUTTER + -IC.

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T. F. HOAD. "butyric." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 28 Nov. 2009 <http://www.encyclopedia.com>.

T. F. HOAD. "butyric." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (November 28, 2009). http://www.encyclopedia.com/doc/1O27-butyric.html

T. F. HOAD. "butyric." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved November 28, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-butyric.html

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