tannic acid
1
6.7
- noun
- /ˈtænɪk ˈæsɪd/
- Specialized
:
ácido tánico
- Food-grade tannic acid is used to color and clarify soft drinks and beer.
- tannic acid and tannin
- foods high in tannic acid
- Tannic acid is used
Examples
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Tannic acid, made from plant tannins, is the lab-manufactured synthetic form of tannin.
Blog text (4) -
Tannic acid is often used in the tanning acid process to preserve leather and enhance its durability.
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But is tannic acid naturally present in tea?
Blog text (4) -
The articles linked to above all mention tannic acid, which, according to the articles, is naturally present in tea.
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Tannic acid is used for staining wood and leather.
Blog text (4) -
"These contain tannic acid and gallic acid, which can be leached out as a clear, colorless solution.
Academic text (2007) -
One should never suspect that in wood the high levels of metal chelator, tannic acid, could hold metals with a strong X-ray absorbance spectrum.
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I read one article after another for about half an hour, and it appears that the claims that tannic acid is naturally present in tea stem from the loose and interchangeable use of "tannic acid" with "tannin."
Blog text (4) -
I read one article after another for about half an hour, and it appears that the claims that tannic acid is naturally present in tea stem from the loose and interchangeable use of "tannic acid" with "tannin."
Blog text (4) -
In herbal medicine, tannic acid is applied to treat minor wounds and reduce inflammation.
Synonyms
9
6.9
A natural part of some plants that makes wine or tea taste dry and bitter and helps make leather
Surface Forms
Morphology
The noun is fully compositional: 'tannic' means relating to tannin and 'acid' is an acidic substance, so 'tannic acid' denotes an acid containing or derived from tannins. This adjective+noun pattern is regular and mirrored in other languages (e.g., ácido tánico, acide tannique), so a B1 learner who knows both constituents can infer the meaning.
Etymology
Tannic acid: The name tannic acid comes from old leather-making. Tanners soaked animal skins in water made from tree bark and leaves that had tannins, plant substances that make skin tough, so tannic acid is the plant acid used for 'tanning' and for some medicines.