tannic acid


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Related to tannic acid: tannin

tannic acid

[′tan·ik ′as·əd]
(organic chemistry)
C14H10O9 A yellowish powder with an astringent taste; soluble in water and alcohol, insoluble in acetone and ether; derived from nutgalls; decomposes at 210°C; used as an alcohol denaturant and a chemical intermediate, and in tanning and textiles. Also known as digallic acid; gallotannic acid; gallotannin; tannin.
C76H52O46 Yellowish-white to light-brown amorphous powder or flakes; decomposes at 210-215°C; very soluble in alcohol and acetone; used as a mordant in dyeing, in photography, as a reagent, and in clarifying wine or beer. Also known as pentadigalloylglucose.
References in periodicals archive ?
The phytochemical screening revealed the presence of alkaloids, saponins glycosides, flavonoids, steroid, anthraquinone and tannic acids in both extracts investigated.
The main parameters that influence the production of tannase are tannic acid concentration, humidity, type of substrate used, temperature, pH, incubation time and addition of different sources of carbon and nitrogen (LEKHA; LONSANE, 1997).
Processing acorns does take a decent amount of time because you have to remove the tannic acid, so do a bit of research about how to eat acorns before you dive in.
Tannic Acid or Hydrolysable Tannins are naturally occurring complex phenol-rich polymers; prevalent in a wide variety of herbs plants and fruits.
Tannic acid, or tannin, is a phenolic antioxidant that binds to allergenic protein fragments, forming insoluble complexes that may keep the allergenic protein from being released in the stomach and gut.
Nadkarni Km described that extract obtained from bark, wood, flowering tops and gum contains tannic acid 35%, catechuic acid or catechin, catechu red, tannin gum, guercetin and ash.
The study provides insights into whether tannic acid can be used during food processing to reduce the allergenicity of peanut-based foods and beverages.
In this study, we used lipid soluble antioxidants such as thymoquinone, epigallocatechin-3-gallate, and tannic acid as experimental agents for the conventional treatment to observe morphological changes in the LNCaP cell line.
Considerable amounts of experimental data on the antioxidant activity of both tannic acid and gallic acids with emphasis on structure-function antioxidant activity have been reported [12].
It has also been described that certain polyphenols, namely tannic acid and coumarins (Perez-Vicente et al.
It's not often that chemists find a quick, simple and cheap method for making things with widely available ingredients, but researchers have done just that: They've created elegant little capsules and coatings in water simply by mixing iron and a compound from plants called tannic acid.