Talk:Acetaldehyde

message: The pKa value given is far too low; unless you can cite a very recent source, it's generally accepted that acetaldehyde has a pKa value of 17 in water. See for example Anslyn & Dougherty, Modern Physical Organic Chemistry, p. 276.  — Preceding unsigned comment added by 205.133.211.141 (talk) 19:43, 27 March 2015 (UTC)
thread_title: Untitled

message: "L-Cysteine and L-glutamine, which each contain a thiol group, can force conversion back into ethanol, to similar effect."
Should there be something else instead of L-glutamine? Sampo Tiensuu 19:57, 4 June 2006 (UTC)
thread_title:  L-glutamine does not contain a thiol group 

message: "smoking." Encyclopædia Britannica. 2006. Encyclopædia Britannica Premium Service. 25 Feb. 2006 <http://www.britannica.com/eb/article-242792> says:
:"Other constituents, such as acetaldehyde, have addictive effects of their own. Cigarettes, therefore, are much more addicting than nicotine medications..."
So I added a bit about that. Nonenmac 18:30, 25 February 2006 (UTC)
replies: text: did the EB cite any sources for that? If not, it just sounds like typical, biased, anti-tobacco rhetoric. Ideally, wikipedia is better than the EB. Let's remember this is an article about acetaldehyde. --Kvuo 01:53, 12 May 2007 (UTC)
replies: text:  The free version doesn't show any citations. Also, this sentence makes no sense: "Acetaldehyde is an air pollutant resulting from combustion, such as automotive exhaust and tobacco smoke, contributing to the addictive properties of tobacco" Why not just say "...tobacco smoke. Evidence exists that suggests Acetaldehyde itself may have addictive properties." and just reference that EB article? 97.82.254.213 23:02, 28 June 2007 (UTC)
thread_title:  Addictive? 

message: <P>A possible citation would be Weissermel, Klaus & Arpe Hans-Jürgen (2003). <I>Industrial Organic Chemistry, Fourth Edition.</I> (p 166). New York: Wiley-VCH. </P>
Ehnebuske 16:07, 12 March 2007 (UTC)
thread_title:  Citation for US production of acetaldehyde 

message: Is this a real galaxy? All google searches for it point back to this article. I see the print source cited, but don't have the ability to check it.--65.30.177.60 20:32, 13 October 2007 (UTC)
replies: text:  It was a bogus citation, the publication has nothing to do with it. I have cleaned it up here and under ethenol. Сасусlе 21:03, 13 October 2007 (UTC)
thread_title: Galaxy N-ID9

message: This article talk page was automatically added with  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) 01:00, 4 July 2008 (UTC)
thread_title: [[WP:FOOD|WikiProject Food and drink]] Tagging

message: Its production was made by reaction of acetylene (C2H2) and water (H2O), in the presence of mercury salts:
C2H2 + H2O -------->H3C-C=O
                         \O or C2H4O(Acetaldehyde)      Agre22 (talk) 22:14, 16 May 2009 (UTC)
thread_title: Production

message: Prop 65's listing is notable in and of itself and is published on California's state government website. KeepCalm: I suggest that you bring this matter up on an appropriate Wikipedia forum.  —Preceding unsigned comment added by Eye.earth (talk • contribs) 01:36, 28 January 2010 (UTC)
thread_title: Safety

message: http://www.journals.elsevierhealth.com/periodicals/bps/article/PIIS0006322309011780/abstract
Ethanol metabolises to ethanal and there is some evidence pointing in the direction of ethanal being the main cause of psychoactivity in alcohol, mainly that the lack of the gene facilitating ethanal breakdown(which most Asians lack) increases "drunkedness". Arkos vahamaki (talk) 10:15, 20 February 2010 (UTC)
replies: text: That work seems interesting, but Wikipedia does not seek primary journal references. See WP:secondary.  We're not a science or news blog, supposedly.--Smokefoot (talk) 15:40, 20 February 2010 (UTC)
thread_title:  Role in ethanol's psychoactive action 

message: The first line of the article says "Acetaldehyde (systematically ethanal) is an organic chemical compound with the formula CH3CHO or MeCHO." What is the element Me? Ndanielm (talk) 21:06, 4 December 2011 (UTC)
thread_title:  Element Me? 

message: the image for tautomerization is grossly misleading, this is almost certainly a solvent assisted (or in the case of the pure substance, a multi-step, polymolecular) process.50.136.184.240 (talk) 10:11, 17 January 2013 (UTC)
thread_title:  tautomerization 

message: Acetaldehyde is not pungent in real life, reference Merck Chemical Index. (At least no more so than pure ethanol vapor, acetaldehyde boils at RTP.) An experience that sticks with me is working in a Lab (in California, a warm climate) and having Acetaldehyde (liquid) in a large beaker on my left and a fume hood on my right. Acetaldehyde has a low heat of evaporation (e.g. ether) and boils at about room temperature. I noticed a mild smell faintly like ether or ethyl alcohol. About 300ml of Acetaldehyde had evaporated when I next looked at it, and I had a splitting headache reminiscent of a hangover. At college, UCSB, we (human volunteers) tested a pyrazole alcohol dehydrogenase inhibitor yielding a longer period of action for alcohol intoxication and no "hangover". See Ethanol metabolism also. Trying to find a reference re Aldehyde dehydrogenase (ALDH) inhibited by Ethanol causing buildup of Acetaldehyde. 
Shjacks45 (talk) 04:26, 14 June 2013 (UTC)
replies: text: Apparently, it's not pungent according to the article either. So, you're point is what exactly? Plasmic Physics (talk) 04:36, 14 June 2013 (UTC)
thread_title:  Acetaldehyde is not pungent in real life 

message: I check pages listed in :Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of :Acetaldehyde's orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.
Reference named "NIOSH":
From Sulfur dioxide: 
From Acetic anhydride: 
From Vinyl acetate: 
From Acetonitrile: 
From Acetylene: 
From Acetone: 
I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT⚡ 22:20, 25 January 2015 (UTC)
thread_title:  Orphaned references in [[:Acetaldehyde]] 

message: removed the link to "muscle" from "abnormal muscle development", because in the linked article there's no mention of acetaldehyde. 
also worth of consideation whether the section about carcinogenity is the right place for discussion of abnormal muscle developement.
80.98.114.70 (talk) 08:59, 3 April 2016 (UTC)
thread_title:  carcinogenity 

message: Hello fellow Wikipedians,
I have just modified  on Acetaldehyde. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Corrected formatting/usage for http://www.universityofcalifornia.edu/news/article/6726
*Added archive https://web.archive.org/web/20150226053029/https://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/17627/Dornath%20thesis.pdf?sequence=1 to https://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/17627/Dornath%20thesis.pdf?sequence=1
*Added archive https://web.archive.org/web/20081227035621/http://www.cdc.gov:80/niosh/nmam/pdfs/2018.pdf to http://www.cdc.gov/niosh/nmam/pdfs/2018.pdf
*Added archive https://web.archive.org/web/20041009142826/http://www.grokfood.com:80/additives/2.htm to http://www.grokfood.com/additives/2.htm
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at ).
Cheers.—InternetArchiveBot (Report bug) 09:27, 3 October 2016 (UTC)
thread_title:  External links modified 

message: Acetaldehyde is given off by yeast during the fermentation stage of beer production and may remain in the beer if not properly fermented. It's noted for giving a green apple taste and is considered an off flavor in most kinds of beer. Maybe this might be worth including in the article?  — Preceding unsigned comment added by 67.164.188.243 (talk) 05:51, 30 January 2017 (UTC)
thread_title:  Off Flavor in Beer 

message: Acetaldehyde boils at room temperature. Should it be considered as a gas? LeticiaLL (talk) 12:19, 15 August 2020 (UTC)
replies: text: I am not sure; the typical definition for room temperature is at 25°C at standard pressure. I think in this case in laboratories acetaldehyde is in liquid form; at the least I seem to remember that from chemical laboratory classes. Technically "glass" is liquid too, but most people will consider it a solid. 2A02:8388:1641:8380:F57D:59AE:A2AE:B491 (talk) 15:28, 2 September 2020 (UTC)
replies: text: It's always a liquid in the chemistry labs I run at the local community college. --Khajidha (talk) 13:48, 10 October 2020 (UTC)
thread_title:  Gas or liquid?