Talk:Diesel exhaust fluid

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Short and Confusing[edit]

Going to try and get a less-technical summary, a basic break down of the chemistry, as well as some useful pictures up. There seems to be a bit of trouble explaining it to the extent that it'd be easily understood by someone who isn't familiar with it. Linked an external video with a bit of an explanation as to how it works in the trucks.

JFife (talk) 15:51, 9 July 2012 (UTC)

Less technical[edit]

Is there any propsect of a less-technical summary of what this fuel is for? I found this article a bit heavy-going when I was researching fuel options for a general article on motoring.

External links[edit]

The page didn't seem to be visited very often, so I was bold and went ahead and removed a number of external links to decrease the page's likelihood of gathering more spam. If anybody semi-knowledgable about the topic wants to comb through and salvage any that look like they'd fit WP:EL, please feel free. --Interiot 14:42, 16 August 2006 (UTC)

I removed the remaining ads. They are prominently linked from the search engine page anyway. Pavel Vozenilek 23:21, 31 August 2006 (UTC)

Removed external commercial links - most are linked from AdBlue search engine...

Removed the AdBlue search engine for Brazil. The link was dead and didn't return any results in Google.--Chris Otto 16:02, 30 August 2007 (UTC)

Non-English links[edit]

repeated reinsertion of these Turkish language links from various TurkTelekom IP's:

per Wikipedia:External_links#Non-English_language_content they appear to add nothing to the article and there are other English language links available -- repeated reinsertion could be considered link spamming. – Zedla (talk) 22:43, 30 January 2008 (UTC)

Both of these domains are registered to the same person (see [1] and [2]). – Zedla (talk) 03:36, 31 January 2008 (UTC)

Chemistry, please![edit]

Let's see some! I bet many people visiting this page are at least as interested in science as they are in marketing! —Preceding unsigned comment added by (talk) 06:34, 17 April 2009 (UTC)

Image/conflict-of-interest issues[edit]

Jfife, I have difficulty assuming good faith on your own-work free-image claim on the DEF jug image you inserted. It looks just like the images at the company's website. For now I've reverted to the previous image which has an unquestionable free-image status. Perhaps the images really are yours to distribute as you see fit because you are affiliated with the H2blu company—I notice you're a brand-new user and you've only ever made edits to this article, and the external links you added/I removed go to that same company's website—in which case there are COI issues to be carefully worked out. —Scheinwerfermann T·C21:34, 9 July 2012 (UTC)

Contribution by users with a potential conflict of interest is not forbidden. For any commercial product, someone has to manufacture it, and forbidding photos of products defeats the purpose of images in an article. Adding brand names instead of common nouns or removal of content concerning competing products would be a COI. Adding pictures of a commercial product is not. Likewise, you removed this link, which gives a long general interest introduction to the topic, just not promoting Brenntag. Again, similar reasoning can be used against this. (COI disclaimer: The undersigned is employed by a public university and engaged in research unrelated to the topic of this article.) --vuo (talk) 19:54, 15 August 2012 (UTC)

Bad copy source[edit]

The author took material from here: but it made it look like AdBlue is pourred inside the engine. It is all because of naration style, he modified the source badly. — Preceding unsigned comment added by (talk) 14:43, 20 December 2012 (UTC)

Ammonia as a pollutant[edit]

This article [3] is obviously meant to be a joke but is there a serious point behind it? Isn't ammonia just as harmful as nitrogen oxides? Biscuittin (talk) 13:04, 10 September 2014 (UTC)

Not really. The problem with nitrogen oxides is that they are surprisingly hydrophobic, so they can get pretty deep inside the lungs. Ammonia, on the other hand, is freely water-soluble. It isn't actually very toxic, since it can be readily eliminated; you can handle even concentrated solutions without much risk. It is harmful to fish, but it would be unlikely for a car to poison a lake just with a slight overstoichiometry of DEF. And the article repeats the common misconception that urine and ammonia are the same thing. Ammonia in DEF is synthetic. Yes, ammonia is an important component of urine. But, so is water an important component of vodka, and you wouldn't call Stolichnaya a brand of mineral water either, would you? --vuo (talk) 21:56, 10 September 2014 (UTC)
Only in over-Stolichnometric doses. (talk) 20:29, 11 January 2015 (UTC)
Ammonia: "Ammonia is an irritant and irritation increases with concentration; the Permissible Exposure Limit is 25 ppm, and lethal above 500 ppm". cf Wikipedia134.247.251.245 (talk) 10:46, 23 September 2015 (UTC)

Would diesel exhaust fluid be toxic to someone with kidney problems? If a person has a problem eliminating ammonia, would a vehicle with DEF be an additional hazard to the driver? — Preceding unsigned comment added by Naradabill (talkcontribs) 07:49, 18 June 2015 (UTC)


Just a minor glitch: Although it is common to write NOx when talking about molecules of nitrogen and oxygen, but chemically it's wrong. It assumes that the number of oxygen atoms varies but nitrogen is constant to 1. Which it isn't. There are most commonly NO2 and N2O3, but NO, N2O, N4O, N4O2, N4O6, N2O4 and N2O5 do exist also.

So it would be more correct to write NxOy. (talk) 10:41, 23 September 2015 (UTC)

No. DEF is only intended to cut down the mono-nitrogen oxides NO and NO2, which are correctly referred to here as NOx. Perhaps we need to add the "mono-" to make it clearer. --Heron (talk) 12:23, 10 February 2016 (UTC)

Need a section on where it is legally required[edit]

I read an article saying that Adblue is required in EU, particularly in Italy. Diesel cars have software counter and won't start when they run out of Adblue even though the engine can perfectly work without it. Which countries require it? Article should have such section. (talk) 06:35, 7 April 2016 (UTC)


For NO2, the chemical equation is given as 3NO2 + 4NH3 + 3O2 -> 7/2N2 + 6H2O. However, this isn't balanced in oxygen; it would seem that no oxygen is consumed by the reaction. I've been bold, and fixed this. I've also added overall reactions for generating ammonia gas from urea, and the destruction of NO2 by urea. LongHairedFop (talk) 15:04, 10 April 2016 (UTC)

I've added the patent as a source. It agrees with your removal of the oxygen, it's also not clear where all that much free oxygen would have come from. Andy Dingley (talk) 20:50, 10 April 2016 (UTC)
Thanks. Can I ask why you removed my addition of     (NH
+ H
→ 2NH
+ CO2     for the formation of ammonia from urea? LongHairedFop (talk) 21:16, 10 April 2016 (UTC)
Sorry, hadn't noticed that - I've put it back. Andy Dingley (talk) 21:27, 10 April 2016 (UTC)

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