Gallic acid2

Gallic acid

Benzoic acid,3,4,5-trihydroxy-;Gallic acid;3,4,5-Trihydroxybenzoic acid;NSC 20103;NSC 674319;3,4,5-Hydroxybenzoic acid;A 1925-04

149-91-7

C7H6O5

InChIKey=LNTHITQWFMADLM-UHFFFAOYSA-N

170.12000

170.12

205-749-9

632XD903SP

1174

755825|674319|36997|20103

DTXSID0020650

Colorless or slightly yellow cyrstalline needles or prisms.|NEEDLES FROM ABSOLUTE METHANOL OR CHLOROFORM|White needles

2918290000

Anticaking Agent

97.99000

0.7

Gallic acid is an odorless white solid. Sinks in water. (USCG, 1999)

169 g/cm³ @ Temp: 20 °C

210 °C

501.1ºC at 760 mmHg

271ºC

1.73

H2O: 12 g/L cold water;Solubility in water, g/100ml: 1.1 (moderate)

Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incom

7.32E-11mmHg at 25°C

pKa = 4.40

130.9 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]

Formerly reported as decomp at 235-240 °C|WHITE TO PALE FAWN COLORED CRYSTALS; ODORLESS /MONOHYDRATE/|Solutions of gallic acid, particularly of the alkali metal salts, absorb oxygen and turn brown in air

Sparingly water soluble (NTP, 1992)

Acids, Carboxylic

Phenols, such as GALLIC ACID, do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has pKa = 9.88). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (for example, by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid.