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Name:  ácido gálico

Synonyms:  Gallic acid stearyl ester; 3,4,5-Trihydroxybenzoic acid stearyl ester

Molecular Formula:C25H42O5

Molecular Weight:422.60

CAS Registry Number:10361-12-3

Gallic acid is an organic acid, also known as 3,4,5-trihydroxybenzoic acid, found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants. The chemical formula is C6H2(OH)3COOH. Gallic acid is found both free and as part of tannins. Salts and esters of gallic acid are termed gallates. Despite its name, it does not contain gallium.

Gallic acid is commonly used in the pharmaceutical industry. It is used as a standard for determining the phenol content of various analytes by the Folin-Ciocalteau assay; results are reported in gallic acid equivalents. Gallic acid can also be used as a starting material in the synthesis of the hallucinogenic alkaloid mescaline.

Gallic acid was one of the substances used by Angelo Mai among other early investigators of palimpsests to clear the top layer of text off and reveal hidden manuscripts underneath. Mai was the first to employ it, but did so "with a heavy hand," often damaging manuscripts for future study.Gallic acid seems to have anti-fungal and anti-viral properties. Gallic acid acts as a antioxidant and helps to protect our cells against oxidative damage. Gallic acid was found to show cytotoxicity against cancer cells, without harming healthy cells. Gallic acid is used as a remote astringent in cases of internal haemorrhage. Gallic acid is also used to treat albuminuria and diabetes. Some ointment to treat psoriasis and external haemorrhoids contain gallic acid."

Product name Gallic acid
Molar mass 170.12 g/mol
Appearance White, yellowish-white, or pale fawn-colored crystals.
Density 1.7 g/cm3 (anhydrous)
Melting point 250 °C, 523 K, 482 °F
Solubility in water 1.1 g/100 ml water @ 20° C
MSDS External MSDS



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