Talk:Sodium dodecyl sulfate/Archive 1

This article says that sodium lauryl sulfate == sodium dodecyl sulfate. The article for sodium laureth sulfate implies that they are different: which is correct?

They are not different.

Sodium laureth sulfate article now fixed. --Heron 09:49, 29 Nov 2004 (UTC)

Better UNfix it, then! The "-eth" ending means one or more ethoxyl units, so it's NOT the same as laurYL. -- robgood@bestweb.net, 12/16/04

Looks like we lost a resource -- http://www.huibers.org/surfactants/. -- robgood@bestweb.net, 12/18/04

The use of Sodium Laureth Sulfate has been linked to mouth sores or canker sores in many people. http://www.saveyoursmile.com/cankersores/studies.html -- holstein13@hotmail.com, 12/23/04

No, that's lauryl, not laureth. I don't think the ether sulfate is in wide use in toothpastes. -- robgood@bestweb.net, 1/8/05

Should I add a section on ferrofluids? A NASA article says this is the surfactant they use in most of the ferrofluids they work with.DUCK 15:18, 13 April 2006 (UTC)

http://www.aegis.com/news/re/1999/RE990220.html

SDS kills AIDS, herpes, HPV? scharles 18:20, 5 May 2006 (UTC)


 * Sulfuric acid kills all those things too. The problem is to find something that kills them but doesn't kill people. —Keenan Pepper 00:10, 6 May 2006 (UTC)

Safety concerns relating to SLS
Ok. I go to a hippie school, and I appreciate that alot of people are concerned about the possible health risks brought on by SDS. But come on people. This is suppsoed to be an encyclopedia. Try not to reference internet-only articles that reference articles that reference journals. Just find a published piece of research that supports your view. The citations in the "Safety concerns relating to SLS" section need to be updated. I know we can do better people; let's hold the science articles up to a higher standard. -Shaggorama 08:49, 2 October 2006 (UTC)


 * at the very least, it should be on the SLS page and not here.

SLS is commonly used as an irritant in medical studies, and the fact that a citation is 20 years old does not invalidate it. An American Journal of Toxicology Report states that "Other studies have indicated that Sodium Lauryl Sulfate enters and maintains residual levels in the heart, the liver, the lungs and the brain from skin contact. This poses question of it being a serious potential health threat to its use in shampoos, cleansers, and tooth pastes." [User: K1lted] 10:30, 23 January 2007 (CET)

"A chronic oral feeding study in rats of 0.25%, 0.5% and 1.0% Sodium Lauryl Sulfate in the diet for two years produced no observable abnormalities except for moderate to severe dermal effects. " From the same study. I think the jury may still be out on this one. —Preceding unsigned comment added by 146.7.123.51 (talk) 22:01, 17 March 2008 (UTC)

CMC of SDS
Can someone cite the CMC value for SDS? This page says the CMC is 8.4 mM, but people have obtained alternate values using different methods. Example - 3.4 mM when using Capillary Electrophoresis method. http://www.jstage.jst.go.jp/article/analsci/14/2/379/_pdf

I have cited a reference for CMC = 8.2 mM —Preceding unsigned comment added by Tomsey11 (talk • contribs) 16:26, 9 November 2008 (UTC)

Remove unsourced tag
I have removed the unsourced tag as there are numerous sources cited in this article, if a statement or fact is in question please use the tag so the problem may be specifically addressed many thanks --Matt 10:27, 22 January 2007 (UTC)

Title Change
Sodium dodecyl sulfate is most widley known as sodium lauryl sulfate. When you read ingredient labels is always states: Sodium lauryl sulfate and never Sodium dodecyl sulfate. Can someone who knows how to do this change the title to reflect the most widely used name? Thanks in advance for your help. -- MotherAmy 18:29, 24 May 2007 (UTC)
 * Yeah, I admit I was rather surprised as well, at the change, and then the consequent use of "SDS" in the article... Maybe switch to "SLS" as is more commonly used (at least, in my experience as a user of non-SLS toothpaste). Maybe change? Mirithing (talk) 11:08, 20 November 2007 (UTC)
 * many articles link to this one as SLS, including Sodium lauryl sulfate redirecting here, yet this page has no mention of the lauryl/L name... In fact, all the external-reference names say "sodium lauryl sulfate"/"SLS", so if anything needs citation it's the SDS name! I'll try editing the article / moving the page...  —Preceding unsigned comment added by Isaac Dupree (talk • contribs) 12:53, 7 January 2008 (UTC)
 * okay, moved and renames done in article, see edit summaries (I hate the 200-character limitation)... I guess I'll go change all the redirect pages since Wikipedia doesn't do that automatically &mdash;Isaac Dupree(talk) 13:07, 7 January 2008 (UTC)

How does it bind?
My supervisor says it binds to hydrophobe residues, is this correct? --192.38.113.177 14:33, 22 June 2007 (UTC)

my research involves suspending carbon nanotubes in SDS with sonication. Pure CNTs are hydrophobic, so I believe he is correct.

Incorrect image
The image:


 * [[Image:Dodecylsulfate-3D-vdW.png|200px]]

Is incorrect for this article: where is the sodium? The image name "Image:Dodecylsulfate-3D-vdW.png" does not have sodium in it so I think the image is correct, it is just being misused. Yes? Cburnett (talk) 02:04, 7 March 2008 (UTC)


 * The crystal structure of anhydrous SDS is here. I will attempt to make an image of the structure as soon as possible.


 * I didn't add a sodium ion in the original dodecyl sulfate image so that (1) it could be used in other contexts and (2) so as not to give the impression that SDS is a molecule - it's an ionic compound which dissociates into sodium cations and dodecyl sulfate anions in solution.


 * Ben (talk) 02:49, 7 March 2008 (UTC)


 * This image would be fine if this article was about dodecyl sulfate, yes? But it's specifically about sodium DS.  You know more about chemistry than I so either the image should be changed to reflect the article or the caption of the image needs to be very explicit about what it's representing so people like me aren't confused: I'll let you pick!  :)  Cburnett (talk) 02:58, 7 March 2008 (UTC)


 * Yes indeed, tomorrow I'll put a sodium atom in the image, then later I'll make a full unit cell.


 * Ben (talk) 03:13, 7 March 2008 (UTC)


 * Sweet! Cburnett (talk) 03:34, 7 March 2008 (UTC)

IMHO the space-filling model is not appropriate for ionic substances. I would suggest to just remove it. --Leyo 13:59, 7 March 2008 (UTC)


 * New image added. Sorry for the delay.


 * Ben (talk) 19:33, 14 July 2008 (UTC)

Carcinogenicity
Is it carcinogenic? Badagnani (talk) 20:12, 28 April 2008 (UTC)


 * No. Sakkura (talk) 17:09, 1 November 2008 (UTC)

Research
Can anyone pull up this article somewhere: Sugimura: "Light microscopic studies of intestinal damage caused by sodium lauryl sulfate" Nihon University Journal of Medicine ps. Sorry about "bile salt", I went to fix it and it had already been reverted. --Campoftheamericas (talk) 06:35, 4 September 2008 (UTC)

Sodium Lauryl Sulfate causes damage to intestinal walls: http://www.ingentaconnect.com/content/klu/pham/1994/00000011/00000008/00304592 Quote: "These observations indicate that permeability enhancement and local damage are closely related sequelae of the interaction of surfactants with the intestinal wall, and suggest that local wall damage may be involved in the mechanism of permeability enhancement." —Preceding unsigned comment added by Campoftheamericas (talk • contribs) 02:58, 17 September 2008 (UTC)
 * That paper is:
 * It is somewhat dated and all the authors are linked to one drug company (Pfizer), a situation which tends to reduce the reliability of primary papers. It would be better to seek review articles if possible.User:LeadSongDog come howl  18:49, 23 March 2010 (UTC)

SLS in the SDS-PAGE section?
It seems contradictory to refer to the substance as SLS in the SDS-PAGE section, since SDS refers to the substance by the alternative (and chemically preferred) name. Is there any particular reason to keep it that way? Sakkura (talk) 17:13, 1 November 2008 (UTC)
 * I changed the subsection to only use the SDS name, for consistency. I know it's not consistent with the rest of the article, but the alternative seems more confusing rather than less, as will the link to the SDS-PAGE article be regardless of what the subsection here is called. Sakkura (talk) 01:29, 1 February 2009 (UTC)

Aggregation no. of SDS
This article said it was 50, this was wrong. I have changed it to ~62 and cited a reference —Preceding unsigned comment added by 92.237.154.125 (talk) 16:21, 9 November 2008 (UTC)

This change was made by me —Preceding unsigned comment added by Tomsey11 (talk • contribs) 16:28, 9 November 2008 (UTC)

Lead
The edit has been reverted. There is safety information in the article and the lead can have information about safety. I found Wikipedia policy on this at WP:LEAD. -- MotherAmy 23:19, 19 February 2009 (UTC)

Widely used food additive
COLLEGE OF HEALTH AND HUMAN SCIENCES, OREGON STATE UNIVERSITY It's in my pancake mix. Fourtildas (talk) 18:45, 10 January 2010 (UTC)