Difference between revisions of "Organic acid"
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== Description == | == Description == | ||
| − | A broad class of non-mineral acids that include [http://cameo.mfa.org/materials/fullrecord.asp?name=formic | + | A broad class of non-mineral acids that include [http://cameo.mfa.org/materials/fullrecord.asp?name=formic%20acid formic], [http://cameo.mfa.org/materials/fullrecord.asp?name=acetic%20acid acetic], [http://cameo.mfa.org/materials/fullrecord.asp?name=lactic%20acid lactic], [http://cameo.mfa.org/materials/fullrecord.asp?name=oxalic%20acid oxalic], [http://cameo.mfa.org/materials/fullrecord.asp?name=citric%20acid citric], [http://cameo.mfa.org/materials/fullrecord.asp?name=stearic%20acid stearic], and [http://cameo.mfa.org/materials/fullrecord.asp?name=tannic%20acid tannic] acids. Organic acids occur naturally in plants, fruits, animals, and microorganisms. They are much weaker proton donors than mineral acids, but can still have detrimental effects on materials, such as paper, leather, metals, and photographs. Of concern in a museum environment is the volatility of many of organic acids and their ubiquitous presence in many materials. |
[[File:Image3_802331.jpg|thumb|Complex organic acid salts]] | [[File:Image3_802331.jpg|thumb|Complex organic acid salts]] | ||
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== Authority == | == Authority == | ||
| − | * | + | * R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966 |
| − | * | + | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 313 |
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
| − | * | + | * Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 |
| − | * | + | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 06:22, 24 July 2013
Description
A broad class of non-mineral acids that include formic, acetic, lactic, oxalic, citric, stearic, and tannic acids. Organic acids occur naturally in plants, fruits, animals, and microorganisms. They are much weaker proton donors than mineral acids, but can still have detrimental effects on materials, such as paper, leather, metals, and photographs. Of concern in a museum environment is the volatility of many of organic acids and their ubiquitous presence in many materials.
Synonyms and Related Terms
carboxylic acid
Additional Information
P.Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002.
Authority
- R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 313
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997