Talk:Ethylene glycol

I meant instead: where does the ethylene come from? Or rather, from what natural source does the ethylene come? Commercial quantities of ethylene production starts with either natural gas liquids (from natural gas) or from naptha, which comes from oil refining. In nature, ethylene is produced by the ripening of tomatoes.

It is like to speak about EDTA ethylenediaminetetraacetic ( http://www.chm.bris.ac.uk/motm/edta/edtah.htm ) theire is no ethylene in this molecule. But it's named like that.

Does anyone know the source of ethylene glycol or how it is produced?

See the article - from ethylene, which is converted to ethylene oxide, which then reacts with water and forms ethylene glycol. --Shaddack 00:30, 4 November 2005 (UTC)

Anyone know the boiling points of ethylene glycol mixtures?

See the tables here: http://www.ashchem.com/adc/chemicals/faq_answer.asp?typeID=3&is_header=N --Shaddack 00:30, 4 November 2005 (UTC)

Can ethylene glycol (not ethylene) be produced or found in nature?

Is it true that antifreeze can be diluted and poured into a sewer with no environmental problems? It's degraded by bacteria? — Omegatron 03:58, 10 August 2006 (UTC)

Ethyline Glycol

I Love This Compound Sooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo much!

Safety

A nasty story of a man left blind and deaf after ingesting antifreeze. I would have added it to this article, but the story doesn't definitively say that the substance involved was ethylene glycol. Richard W.M. Jones 15:29, 10 February 2006 (UTC)

Diethylene glycol

The information about diethylene glycol toxicity, (Haiti, Austria) although a related chemical, is not really appropriate for this document, perhaps it should be in diethylene glycol.

Industrial Hazards

I like including a reference to the "Apollo 1" fire in this section. However, the use of the word "caused" wrt the fire seems wrong. Unless someone can quote a more authoritative reference, the following appears in NASA's final report on the accident under PART V. INVESTIGATION AND ANALYSES:

 "There is no substantial evidence that coolant was involved in the initiation of the fire. 
  However, this coolant, when spilled on damaged electrical wires and equipment, provides 
  both the fuel and the ignition mechanism to start a fire. This has been demonstrated in 
  laboratory tests."

ref: http://www.hq.nasa.gov/office/pao/History/Apollo204/invest.html

The coolant referred to is "RS-89", "a mixture of 62.5 percent ethylene glycol, 35.7 percent water, and 1.8 percent stabilizer and corrosion inhibitor."

I think words/phrases like "implicated in", "associated with", "possible cause", etc. would be more appropriate, e.g. "In the Apollo 1 fire catastrophe a coolant comprised mostly of ethylene glycol was implicated as a possible cause via this reaction."

70.92.87.231 22:43, 18 January 2007 (UTC)

Reactivity due to pH variations

What type of reactions does ethylene glycol undergo when acid or base is added? —The preceding unsigned comment was added by 70.113.83.253 (talk) 03:38, 4 April 2007 (UTC).

Found in space

I've removed this chunk because I can't find the article at the source website.

This molecule has been observed in space by Hollis, et al.<ref>{{cite journal | journal = [[The AstroPhysical Journal]] | volume = 571 | pages = L59-L62 | date = 2002 May 20}} http://www.journals.uchicago.edu/ApJ/

Interstellar Antifreeze: Ethylene Glycol doi:10.1086/341148

--Rifleman 82 03:58, 9 August 2007 (UTC)

Flammability

Was curious as to the flammability, after looking at the flashpoint info. Anyone? Being an alcohol, I was suprised to see nothing in the article about it. Pharmboy (talk) 03:09, 17 November 2007 (UTC)

MEG

Where can I find a list of countries which produce Mono Ethylene Glycol and a list of distributors?Robbie.Elmes (talk) 10:37, 7 December 2007 (UTC)

Isophorone

The formula for isophorone is incorrect. The ketone should be α,β-unsaturated. --Vuo (talk) 14:52, 20 July 2008 (UTC)

Fixed (refresh might be needed). My bad! --Rifleman 82 (talk) 15:26, 20 July 2008 (UTC)

Melting/freezing point?

Ethylene glycol is used in car antifreeze (usually mixed with water). But in many areas of the world, temperatures can go way below -12 degrees C, how come ethylene glycol doesn't freeze then? Raduberinde (talk) 17:10, 22 July 2008 (UTC)

Hi! That is a quite difficult process. But even a mixture of water and sodium chloride (normal salt) has a melting point lower than water (in the eutectic point at -21.2 degrees C). Some explanation is there (at eutectic point), the full explanation would include some thermodynamics, probably. Hope this explains. --Dirk Beetstra ^{T C} 15:11, 22 July 2008 (UTC)

In extreme conditions, it probably does freeze. The problem is dealt with using a block heater. -- Ed (Edgar181) 15:14, 22 July 2008 (UTC)

If coolant freezes, wouldn't everything be ripped to shreds because of the expanding ice? Raduberinde (talk) 17:10, 22 July 2008 (UTC)

Not if there is air or other gas in the line. -- Ed (Edgar181) 17:19, 22 July 2008 (UTC)

The eutectic mixture stuff explains it, thanks! In opposition to my intuition, you can get a mixture of water and ethylene glycol which has a much lower freezing point than either of the constituents (as low as -50C!). Perhaps this little bit of information could go in the Antifreeze page? Raduberinde (talk) 17:10, 22 July 2008 (UTC)

Raduberinde, this is Wikipedia, the encyclopedia that anyone can edit, why don't you give it a go? --Dirk Beetstra ^{T C} 08:55, 23 July 2008 (UTC)