gallic acid
Noun: A colorless, crystalline organic acid with the chemical formula C₆H₂(OH)₃COOH. It is obtained from tannin, found in gallnuts, sumac, tea leaves, oak bark, and other plants.
Gallic acid is used as a standard in analytical chemistry, in the manufacture of inks and dyes, and as a precursor in the synthesis of other compounds, such as the antioxidant pyrogallol. It is also studied for its potential biological properties. - The laboratory used pure gallic acid to calibrate the instrument. - Some traditional inks were made using tannin-rich materials that contained gallic acid.
- In Chemistry: Gallic acid is often referenced in studies of polyphenols and antioxidants. It serves as a core structure for a class of compounds known as gallotannins.
- The research paper analyzed the antioxidant capacity of gallic acid derivatives.
- In Pharmacy/Medicine: It is investigated for its astringent and potential therapeutic effects.
- The extract's efficacy was attributed in part to its gallic acid content.
- Gallate (noun): A salt or ester of gallic acid.
- Propyl gallate is a common food additive used as an antioxidant.
- Gallic (adjective): Pertaining to gallic acid or to gallnuts. (Note: This is a specific chemical sense; the more common adjective "Gallic" refers to France or the Gauls).
- The gallic compounds were isolated from the plant extract.
- 3,4,5-Trihydroxybenzoic acid (noun): The systematic IUPAC name for gallic acid.
The term "gallic" itself has two distinct primary meanings: 1. (Adjective, Chemistry) Of or pertaining to gallic acid. 2. (Adjective) Of or pertaining to Gaul or France; French. - The word has no direct idiomatic or phrasal verb connections.
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a colorless crystalline acid obtained from tannin
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