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Common molecules sample 50982 - Reciprocal Net Log in
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Empirical formula: C7H8O6
a: 5.794 Å
b: 4.719 Å
c: 28.688 Å
α (alpha): 90.00 °
β (beta): 95.08 °
γ (gamma): 90.00 °
Volume: 781.30 Å3
Space group: P21/c
Calculated density: 1.599 g/cm3
Z: 4
Temperature: 22.0 °C
Formula weight: 188.137 g/mole
R(F): 0.0420
Structural formula: C7H6O5, H2O1
Common name: gallic acid monohydrate
CSD refcode: KONTIQ
Empirical formula - less solvent: C7H6O5
Common name: Gallic acid
Short description: Gallic acid is a colorless, crystalline, organic acid found in gallnuts, sumach, tea leaves, oak bark, and various other plants
Keyword: tannin
Keyword: organic acid
IUPAC name: 3,4,5-Trihydroxybenzoic acid monohydrate
Citation of a publication: Ren-Wang Jiang, Dong-Sheng Ming, P.P.H.But, T.C.W.Mak (2000) Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.,56, 594
Layman's explanation: Gallic acid is found in its free state and combined with the tannin molecule, from which it can be extracted by the hydrolysis of tannic acid with sulfuric acid. Since one molecule of gallic acid has a carboxylic acid group and hydroxyl groups, it can react with another molecule of gallic acid to form an ester, digallic acid. When heated above 200oC, gallic acid loses carbon dioxide to form pyrogallol (1,2,3-trihydroxybenzene, C6H3(OH)3), which is used in the production of azo dyes, photographic developers, and in laboratories for absorbing oxygen.
Lab name: Common molecules
Sample provider: Obtained courtesy of the Cambridge Structural Database
Status: Complete, visible to public
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