Tartaric acid
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Description
Colorless, transparent crystals that occur naturally in wine lees. Tartaric acid is used in baking powders (potassium hydrogen tartrate), leather tanning and effervescent beverages. Tartaric acid acts as a buffering agent and Sequestrant. It is used by dyers to print a blue ferric tartrate color and to remove some mordants from solution. Tartaric acid (and tartrates) reacts with ammonio-silver nitrate to produce metallic Silver; this reaction is used in photographic developing solutions and for silvering mirrors.
Synonyms and Related Terms
tartar; dihydroxysuccinic acid; L-tartaric acid; racemic acid; uvic acid; Weinsäure (Deut.); Ácido tartárico (Esp., Port.); Wijnsteenzuur (Ned.)
Physical and Chemical Properties
- Soluble in water, ethanol, ether, glycerol. Insoluble in chloroform.
- Smells of burnt sugar when heated.
- pH = 2.2 (0.1 N solution)
| Composition | HOOC(CH2O)2COOH |
|---|---|
| CAS | 133-37-9 |
| Melting Point | 170 C |
| Density | 1.76 g/ml |
| Molecular Weight | mol. wt. = 150.1 |
Risks
- Combustible. Flash point = 210 C
- Corrosive.
- Contact cause irritation and burns.
- Fisher Scientific: SDS
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 68
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9235
- Wikipedia: http://en.wikipedia.org/wiki/Tartaric_acid (Accessed Sept. 28, 2005)
- S.R.Trotman, E.R. Trotman, Textile Analysis, J.B. Lippincott Company, Philadelphia, 1932
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: pH = 2.2 (0.1 N solution)
- Photographic chemicals: www.jetcity.com/~mrjones/chemdesc.htm