Talk:Gallic acid

Please add {{WikiProject banner shell}} to this page and add the quality rating to that template instead of this project banner. See WP:PIQA for details.

Food and drink Stub‑class

This article is within the scope of WikiProject Food and drink, a collaborative effort to improve the coverage of food and drink related articles on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Food and drinkWikipedia:WikiProject Food and drinkTemplate:WikiProject Food and drinkFood and drink articles

Stub This article has been rated as Stub-class on Wikipedia's content assessment scale.

??? This article has not yet received a rating on the project's importance scale.

This article has been automatically rated by a bot or other tool as Stub-class because it uses a stub template. Please ensure the assessment is correct before removing the |auto= parameter.

Food and Drink task list:

To edit this page, select here

Here are some tasks you can do for WikiProject Food and drink:

Help bring these Top Importance articles currently B Status or below up to GA status: Agaricus bisporus (i.e. mushroom), Beef, Bread, Curry, Drink, Food, Ham and eggs, Soy sauce, Sushi, Yogurt
Bring these Top Importance articles currently at GA status up to FA status: Beer, French cuisine, Sugar
Bring these High Importance articles currently at GA status up to FA status: Apple, Burger King, Fish
Participate in project-related deletion discussions.
Delete unrelated trivia sections found in articles. Please review WP:Trivia and WP:Handling trivia to learn how to do this.
Add the {{WikiProject Food and drink}} project banner to food and drink related articles and content to help bring them to the attention of members. For a complete list of banners for WikiProject Food and drink and its child projects, select here.
Provide photographs and images for Category:Wikipedia requested images of food
Consider joining this project's Assessment task force. List any project ideas in this section

Note: These lists are transcluded from the project's tasks pages.

Please add {{WikiProject banner shell}} to this page and add the quality rating to that template instead of this project banner. See WP:PIQA for details.

Chemicals Stub‑class Low‑importance

	This article is within the scope of WikiProject Chemicals, a daughter project of WikiProject Chemistry, which aims to improve Wikipedia's coverage of chemicals. To participate, help improve this article or visit the project page for details on the project.ChemicalsWikipedia:WikiProject ChemicalsTemplate:WikiProject Chemicalschemicals articles
Stub	This article has been rated as Stub-class on Wikipedia's content assessment scale.
Low	This article has been rated as Low-importance on the project's importance scale.

The COOH group has a pKa of 4.5, and the phenolic OHs have pKa of 10.

this is wrong a priori, you cannot deprotonate all three phenols at once. I don't know which one deprotonates first so i'm not changing it but my guess is on meta. 24.181.29.106

Synthetic route for Gallic acid -> Mescaline

I don't know how to add a citation to this page, but a synthesis of Mescaline from Gallic acid can be found here :

[1] A New Synthesis of Mescaline, Makepeace U. Tsao, J. Am. Chem. Soc. 5495-5496 (1951) —Preceding unsigned comment added by 212.238.246.56 (talk) 11:35, 9 August 2008 (UTC)[reply]

Corrrection - following line removed

Early photographers, including Joseph Bancroft Reade (1801–1870) and William Fox Talbot (1800–1877), used gallic acid for developing latent images in calotypes. It has also been used as a coating agent in zincography.

Claims made on behalf of Joseph Bancroft Reade (1801–1870) were shown by RD Wood to be erroneous he was working with Silver Nitrate; only AgNo3, AgBr, AgI, and theoretically AgF [ie silver chloride/bromide/iodide] have the potential to develop the latent negative image.[See British Journal of Photography, 28 July 1972, Volume 119, No. 5845, pp.644–646, 643]

WikiProject Food and drink Tagging

This article talk page was automatically added with {{WikiProject Food and drink}} banner as it falls under Category:Food or one of its subcategories. If you find this addition an error, Kindly undo the changes and update the inappropriate categories if needed. The bot was instructed to tagg these articles upon consenus from WikiProject Food and drink. You can find the related request for tagging here . Maximum and careful attention was done to avoid any wrongly tagging any categories , but mistakes may happen... If you have concerns , please inform on the project talk page -- TinucherianBot (talk) 06:45, 4 July 2008 (UTC)[reply]

chemical properties citation needed

do you think, phytochemicals.info is a site worth a citation??? esp. because half the article is a citation from there -hig- —Preceding unsigned comment added by 77.132.208.48 (talk) 23:12, 25 April 2009 (UTC)[reply]

pKa-Value

As I am a German Wikipedia user, I read in the German article that the pKa (or pKs as it is called in german) is not 4.5 but 3.13 wich seems correct according to the literature (e.g. Bykova L.N., Petrov S.I.& Blagodatskava Z.G. (1970). Relative acidity of phenol and its derivatives in a medium of nonaqueous solvents. Zh. Obshch. Khim., 40, 2295-3000. and the citation No 3 from the german article). I also think that a higher acidity could be expected than for benzoic acid. This thought also fits following german article (you SHOULD translate that one too, if possible) http://de.wikipedia.org/wiki/Hydroxybenzoes%C3%A4uren (Hydroxybenzoesäuren). — Preceding unsigned comment added by 134.130.112.64 (talk) 20:04, 2 November 2011 (UTC)[reply]

George Washington & his spies

That George Washington's spies used gallic acid as an invisible ink is supposedly mentioned in "Episode 2: Revolution" of the series "America: The Story of Us", which was broadcast by the U.S. cable TV channel, the "History Channel".

However, in "Chapter 4: 711 and the Sympathetic Stain" (pages 101-124) of his book Washington's Spies: The story of America's first spy ring (New York, New York: Bantam, 2006), author Alexander Rose states that one of Washington's spies, Abraham Woodhull, used an invisible ink when he wrote to George Washington, who then used a developing solution to read the writing. However, Rose states that the nature of the invisible ink and the developing solution are unknown -- although Rose speculates that the invisible ink was gallic acid and that the developing solution was iron sulfate.

So I think that this claim -- that Washington's spies used gallic acid -- should either be deleted or tagged as "dubious". Cwkmail (talk) 01:13, 5 August 2012 (UTC)[reply]

Plagiarized content unacceptable

The site "http://www.phytochemicals.info/phytochemicals/gallic-acid.php' reads:

"Gallic acid seems to have anti-fungal and anti-viral properties. Gallic acid acts as a antioxidant and helps to protect our cells against oxidative damage. Gallic acid was found to show cytotoxicity against cancer cells, without harming healthy cells. Gallic acid is used a remote astringent in cases of internal haemorrhage. Gallic acid is also used to treat albuminuria and diabetes. Some ointment to treat psoriasis and external haemorrhoids contain gallic acid."

The wikipedia article reads:

Gallic acid seems to have anti-fungal and anti-viral properties. Gallic acid acts as an antioxidant and helps to protect human cells against oxidative damage. Gallic acid was found to show cytotoxicity against cancer cells, without harming healthy cells. Gallic acid is used as a remote astringent in cases of internal haemorrhage. Gallic acid is also used to treat albuminuria and diabetes. Some ointments to treat psoriasis and external haemorrhoids contain gallic acid.

[i.e., without quotation marks to indicate that the content was lifted in entirety from another source].

This is plagiarized content, even with citation, and is wholely unacceptable. Please correct immediately. LeProf — Preceding unsigned comment added by 71.201.123.248 (talk) 20:22, 3 March 2013 (UTC)[reply]