Editing Polyethylene glycol (section)

===Chemical uses===
[[File:MaryRose-conservation2.jpg|thumb|The remains of the 16th century [[carrack]] ''[[Mary Rose]]'' undergoing conservation treatment with PEG in the 1980s]]
[[File:Terra Cotta Warriors, Guardians of China’s First Emperor 1.jpg|thumb|Terra cotta warrior, showing traces of original color]]
* Polyethylene glycol can serve as a green reaction medium in a variety of organic reactions.<ref>{{Cite journal |last=Vafaeezadeh |first=Majid |last2=Hashemi |first2=Mohammad Mahmoodi |date=2015-07-01 |title=Polyethylene glycol (PEG) as a green solvent for carbon–carbon bond formation reactions |url=https://linkinghub.elsevier.com/retrieve/pii/S0167732215001361 |journal=Journal of Molecular Liquids |volume=207 |pages=73–79 |doi=10.1016/j.molliq.2015.03.003 |issn=0167-7322}}</ref>
* Polyethylene glycol is also commonly used as a polar stationary phase for [[gas chromatography]], as well as a [[Coolant|heat transfer fluid]] in electronic testers.
* PEG is frequently used to [[Conservation and restoration of waterlogged wood|preserve waterlogged wood]] and other organic artifacts that have been salvaged from underwater archaeological contexts, as was the case with the warship ''[[Vasa (ship)|Vasa]]'' in Stockholm,<ref>{{cite book | vauthors = Kvarning LÅ, Ohrelius B | date = 1998 | title = The Vasa – The Royal Ship | isbn = 91-7486-581-1 | pages = 133–141 | publisher = Atlantis }}</ref> and similar cases. It replaces water in wooden objects, making the wood dimensionally stable and preventing the warping or shrinking of the wood when it dries.<ref name="Kean-2017"/> In addition, PEG is used when working with [[green wood]] as a stabilizer, and to prevent shrinkage.<ref>{{cite web | url = https://www.rockler.com/anti-freeze-is-not-a-green-wood-stabilizer | title = Anti-Freeze is Not a Green Wood Stabilizer – Buzz Saw | work = The Rockler Blog | archive-url = https://web.archive.org/web/20220117170449/https://www.rockler.com/anti-freeze-is-not-a-green-wood-stabilizer | archive-date = 17 January 2022 | date = 2 May 2006 | access-date = 30 November 2012 }}</ref>
* PEG has been used to preserve the painted colors on [[Terracotta Army|Terracotta Warriors]] unearthed at a UNESCO World Heritage site in China.<ref>{{cite web | url=https://www.tum.de/en/about-tum/news/press-releases/short/article/32290/ | title=Conservators preserve the paint layers of the Terracotta Army | vauthors = Reiffert S | date=18 March 2015 | website=tum.de | publisher=Technische Universität München | access-date=19 December 2015 | archive-date=22 December 2015 | archive-url=https://web.archive.org/web/20151222113322/https://www.tum.de/en/about-tum/news/press-releases/short/article/32290/ | url-status=dead }}</ref> These painted artifacts were created during the [[Qin Shi Huang]] (first emperor of China) era. Within 15 seconds of the terra-cotta pieces being unearthed during excavations, the lacquer beneath the paint begins to curl after being exposed to the dry [[Xi'an]] air. The paint would subsequently flake off in about four minutes. The German Bavarian State Conservation Office developed a PEG preservative that when immediately applied to unearthed artifacts has aided in preserving the colors painted on the pieces of clay soldiers.<ref>{{cite journal | title=Terra-Cotta Warriors in Color | journal=[[National Geographic (magazine)|National Geographic]] |date=June 2012 | vauthors = Larmer B | volume=221 |number=6 |pages=74–87}}</ref>
* PEG is often used (as an internal calibration compound) in [[mass spectrometry]] experiments, with its characteristic fragmentation pattern allowing accurate and reproducible tuning.
* PEG derivatives, such as [[narrow range ethoxylate]]s, are used as [[surfactant]]s.
* PEG has been used as the hydrophilic block of [[amphiphilic]] block [[copolymers]] used to create some [[polymersome]]s.<ref>{{cite journal | vauthors = Rameez S, Alosta H, Palmer AF | title = Biocompatible and biodegradable polymersome encapsulated hemoglobin: a potential oxygen carrier | journal = Bioconjugate Chemistry | volume = 19 | issue = 5 | pages = 1025–32 | date = May 2008 | pmid = 18442283 | doi = 10.1021/bc700465v }}</ref>
*PEG is a component of the propellent used in [[UGM-133 Trident II|UGM-133M Trident II Missiles]], in service with the [[United States Navy]].<ref name="Strategic Systems Programs">{{cite web|title=Facts: Polaris Poseidon Trident|url=http://www.ssp.navy.mil/about/history_facts_2.html|archive-url=https://web.archive.org/web/20171201033311/http://www.ssp.navy.mil/about/history_facts_2.html|url-status=dead|archive-date=1 December 2017|website = Strategic Systems Programs|publisher = U.S. Navy}}</ref>
* PEG has been used as a solvent for aryl [[thioether]] synthesis.<ref>{{cite journal | vauthors = Firouzabadi H, Iranpoor N, Gholinejad M | title = One-Pot Thioetherification of Aryl Halides Using Thiourea and Alkyl Bromides Catalyzed by Copper(I) Iodide Free from Foul-Smelling Thiols in Wet Polyethylene Glycol (PEG 200)| journal = Advanced Synthesis & Catalysis | volume = 352 | issue = 18 | pages = 119–24 | date = January 2010 | doi = 10.1002/adsc.200900671}}</ref>