soluble in alcohol, ether, glycerol, acetone negligible in benzene, chloroform, petroleum ether
log P
0.70
Acidity (pKa)
COOH: 4.5, OH: 10.
Magnetic susceptibility (χ)
-90.0·10−6 cm3/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Irritant
NFPA 704 (fire diamond)
1
0
Lethal dose or concentration (LD, LC):
LD50 (median dose)
5000 mg/kg (rabbit, oral)
Safety data sheet (SDS)
External MSDS
Related compounds
Related
phenols, carboxylic acids
Related compounds
Benzoic acid, Phenol, Pyrogallol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Chemical compound
Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6H2(OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants.[1] It is a white solid, although samples are typically brown owing to partial oxidation. Salts and esters of gallic acid are termed "gallates".
Its name is derived from oak galls, which were historically used to prepare tannic acid. Despite the name, gallic acid does not contain gallium.
Gallicacid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6H2(OH)3CO2H. It is classified as a phenolic acid...
spontaneously rearranges to gallicacid. Shikimic acid is a precursor for: indole, indole derivatives and aromatic amino acid tryptophan and tryptophan...
the name gallicacid, for a phenolic compound found in these formations 'Gallic' is also a proper noun naming the following ships: SS Gallic (1894), a...
times. Tannins have molecular weights ranging from 500 to over 3,000 (gallicacid esters) and up to 20,000 daltons (proanthocyanidins). There are three...
the first person to synthesize ellagic acid by heating gallicacid with arsenic acid or silver oxide. Ellagic acid is found in oak species such as the North...
reactions as gallotannic acid. It differs however from the latter in not being convertible into gallicacid, and not yielding pyrogallic acid by dry distillation...
raspberry ellagitannin, on the other hand, with its 14 gallicacid moieties (most in ellagic acid-type components), and more than 40 phenolic hydroxyl groups...
name. Fermentation or hydrolysis of the extract releases glucose and gallicacid, which yields a darker purple-black ink, due to the formation of iron...
manner first reported by Scheele in 1786: heating gallicacid to induce decarboxylation. Gallicacid is also obtained from tannin. Many alternative routes...
of tannin that, on heating with hydrochloric or sulfuric acids, yields gallic or ellagic acids. At the center of a hydrolysable tannin molecule, there...
sulfuric acid. 0.05 g of gallicacid is used for every 10 mls of sulfuric acid. The same ratio of gallicacid n-propyl ester in sulfuric acid can also...
acid is an O-methylated trihydroxybenzoic acid. It can be found in Eucalyptus spp. Eudesmic acid is most directly synthesized by reaction of gallic acid...
acid pathway in plants. Syringic acid can be prepared by selectively hydrolyzing (demethylating) eudesmic acid with 20% sulfuric acid. Syringic acid can...
alpha-carotene, and polyphenols, such as quercetin, kaempferol, gallicacid, caffeic acid, catechins and tannins. Mango contains a unique xanthonoid called...
Hexahydroxydiphenic acid is an organic compound with the formula [(HO)3C6HCO2H]2. It is the oxidatively coupled derivative of gallicacid It is a white solid...
belonging to the hydrolysable tannins. Gallotannins are polymers formed when gallicacid, a polyphenol monomer, esterifies and binds with the hydroxyl group of...
Northern Nepal, Bhutan (Haa and Mongar districts). Bergenin, catechin, gallicacid, gallicin, catechin-7-O-glucoside and β-sitosterol can be found in B...
polymerized, creating a new class of polyphenol. For example, ellagic acid is a dimer of gallicacid and forms the class of ellagitannins, or a catechin and a gallocatechin...
gallate is a food additive with E number E313. It is the ethyl ester of gallicacid. Ethyl gallate is added to food as an antioxidant. Though found naturally...
propyl 3,4,5-trihydroxybenzoate is an ester formed by the condensation of gallicacid and propanol. Since 1948, this antioxidant has been added to foods containing...
Methyl gallate is a phenolic compound. It is the methyl ester of gallicacid. It is found in Terminalia myriocarpa, Bergenia ciliata (hairy Bergenia)...
(2004). "TLC Densitometric Method for the Quantification of Eugenol and GallicAcid in Clove". Chromatographia. 60 (3–4): 241–244. doi:10.1365/s10337-004-0373-y...
with gallicacids called chebulin, as well as other phenolic compounds including ellagic acid, 2,4-chebulyl-β-D-glucopyranose, chebulinic acid, gallic acid...
from the appearance of the plant. Bergenin, C-glycoside of 4-O-methyl gallicacid, and its O-demethylated derivative norbergenin, are chemical compounds...
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