tannic acid structure

L'acide tannique est utilisé en médecine vétérinaire comme astringent antidiarrhéique sous forme de lavements. Your email address will not be published. Un article de Wikipédia, l'encyclopédie libre. Tannic acid is useful for its anti-oxidant and anti-mutagenic effects. The with a chemical formula of Tannic acid is C76H52O46.

The chemical formula for commercial tannic acid is sometimes given as C76H52O46, which corresponds to decagalloyl glucose, but it is in reality a mixture of polygalloyl glucose or polygalloyl quinic acid esters with galloyl molecules varying from 2 to 12 depending on the source of the plant. It is used to impart anti-staining properties to polyamide carpets or yarn.

Your email address will not be published. The two main types of Acidum tannicum are Condensed tannins and Hydrolyzable tannins.

Soluble dans l'eau (un gramme par 0,35 mL, Groupe 3 : Inclassable quant à sa cancérogénicité pour l'Homme. The two main types of Acidum tannicum are Condensed tannins and Hydrolyzable tannins. Commercial tannic acid is usuall… Le chimiste Jöns Jacob Berzelius signale qu'en 1838, on utilisait l'extrait d'écorce de chêne (« quercitannate ») pour dissoudre la morphine[8]. When it is absorbed through the skin, it may cause redness and irritation. Required fields are marked *. C'est un acide faible avec un pKa autour de 10 . It is used as a coagulant in the manufacturing of rubber. Tannic acid has numerous phenol groups and hence a weak acid. C7=CC(=C(C(=C7)O)O)O)O)O)OC(=O)C8=CC(=C(C(=C8)OC(=O)C9=CC(=C(C(=C9)O)O).

Une bouteille de solution aqueuse d'acide tannique. 1,2,3,4,6-Pentakis-O-{3,4-dihydroxy-5-[(3,4,5-trihydroxybenzoyl)oxy]benzoyl}-beta-D-glucopyranose, c1c(cc(c(c1O)O)O)C(=O)Oc2cc(cc(c2O)O)C(=O)OC[C@@H]3[C@H]([C@@H]([C@H]([C@@H](O3)OC(=O)c4cc(c(c(c4)OC(=O)c5cc(c(c(c5)O)O)O)O)O)OC(=O)c6cc(c(c(c6)OC(=O)c7cc(c(c(c7)O)O)O)O)O)OC(=O)c8cc(c(c(c8)OC(=O)c9cc(c(c(c9)O)O)O)O)O)OC(=O)c1cc(c(c(c1)OC(=O)c1cc(c(c(c1)O)O)O)O)O Tannic acid has numerous phenol groups and hence a weak acid. C'est un acide faible avec un pKa autour de 10[2]. Possédant un goût astringent, il est utilisé comme agent de saveur[1] (Numéro fema GRAS 3042) pour aliment et le tabac, ou dénaturant d'alcool industriel. The low acidity (pKa at around 6) is due to the structure’s various phenol groups. Tannic acid can damage the eye, respiratory tract, gastrointestinal tract, and skin. Tannic acid is present in nutgalls, arboreal swelling caused by parasitic wasps. La dernière modification de cette page a été faite le 22 septembre 2020 à 04:30. IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, Portail des odeurs, des senteurs et du parfum, https://fr.wikipedia.org/w/index.php?title=Acide_tannique&oldid=174930427, Portail:Alimentation et gastronomie/Articles liés, Portail:Odeurs, senteurs et parfum/Articles liés, licence Creative Commons attribution, partage dans les mêmes conditions, comment citer les auteurs et mentionner la licence. [précision nécessaire].

Tannic acid is a specific form of tannin, a type of polyphenol. It has wide application in the food industry as it is used as a taste enhancer, colour stabilizer, and clarifying agent.

C1=C(C=C(C(=C1O)O)O)C(=O)OC2=CC(=CC(=C2O)O)C(=O)OCC3C(C(C(C(O3)OC(=O)C4=, The Merck Index, 9th edition, Merck & Co., Rahway, New Jersey, 1976. En gravimétrie, on utilise une solution d'acide tannique pour précipiter l'aluminium, le béryllium, le chrome, le gallium, le germanium, le niobium, l'antimoine, l'étain, le tantale, le thorium, le titane, l'uranium, la vanadium, le tungstène, le zirconium[9]. Il est utilisé pour la clarification du vin ou de la bière et la dénaturation de l'alcool industriel.

Tannic acid is a novel hERG channel blocker with IC50 of 3.4 μM.

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