Editing Eutectic system (section)

===Others===
[[File:Phase diagram ethanol water s l en.svg|thumb|upright=1.3|Solid–liquid phase change of ethanol–water mixtures]]
* [[Sodium chloride]] and [[water]] form a eutectic mixture whose eutectic point is −21.2&nbsp;°C<ref>{{cite web | last = Muldrew | first = Ken | author2 = Locksley E. McGann | year = 1997 | url = https://www.ucalgary.ca/~kmuldrew/cryo_course/cryo_chap6_1.html | title = Phase Diagrams | work = Cryobiology—A Short Course | publisher = University of Calgary | access-date = 2006-04-29 | archive-url = https://web.archive.org/web/20060615124330/http://www.ucalgary.ca/~kmuldrew/cryo_course/cryo_chap6_1.html | archive-date = 2006-06-15 | url-status = dead }}</ref> and 23.3% salt by mass.<ref>{{cite web | last = Senese | first = Fred | year = 1999 | url = http://antoine.frostburg.edu/chem/senese/101/solutions/faq/saltwater-ice-volume.shtml | title = Does salt water expand as much as fresh water does when it freezes? | work = Solutions: Frequently asked questions | publisher = Department of Chemistry, Frostburg State University | access-date = 2006-04-29}}</ref> The eutectic nature of salt and water is exploited when salt is spread on roads to aid [[snow removal]], or mixed with ice to produce low temperatures (for example, in traditional [[ice cream]] making).
* Ethanol–water has an unusually biased eutectic point, i.e. it is close to pure ethanol, which sets the maximum proof obtainable by [[fractional freezing]]. 
* "Solar salt", 60% NaNO<sub>3</sub> and 40% KNO<sub>3</sub>, forms a eutectic molten salt mixture which is used for [[thermal energy storage]] in [[concentrated solar power]] plants.<ref>{{cite web |title=Molten salts properties |url=http://www.archimedesolarenergy.com/molten_salt.htm |work=Archimede Solar Plant Specs |access-date=2011-07-15 |archive-date=2020-04-20 |archive-url=https://web.archive.org/web/20200420183555/http://www.archimedesolarenergy.com/molten_salt.htm |url-status=dead }}</ref> To reduce the eutectic melting point in the solar molten salts, [[calcium nitrate]] is used in the following proportion: 42% Ca(NO<sub>3</sub>)<sub>2</sub>, 43% KNO<sub>3,</sub> and 15% NaNO<sub>3</sub>.
* [[Lidocaine]] and [[prilocaine]]—both are solids at room temperature—form a eutectic that is an oil with a {{convert|16|C|abbr=on}} melting point that is used in [[eutectic mixture of local anesthetic]] (EMLA) preparations.
* [[Menthol]] and [[camphor]], both solids at room temperature, form a eutectic that is a liquid at room temperature in the following proportions: 8:2, 7:3, 6:4, and 5:5. Both substances are common ingredients in pharmacy extemporaneous preparations.<ref>{{Cite journal |last1=Phaechamud |first1=Thawatchai |last2=Tuntarawongsa |first2=Sarun |last3=Charoensuksai |first3=Purin |date=October 2016 |title=Evaporation Behavior and Characterization of Eutectic Solvent and Ibuprofen Eutectic Solution |journal=AAPS PharmSciTech |volume=17 |issue=5 |pages=1213–1220 |doi=10.1208/s12249-015-0459-x |issn=1530-9932 |pmid=26669887|doi-access=free }}</ref>
* [[Mineral]]s may form eutectic mixtures in [[igneous]] rocks, giving rise to characteristic [[Rock microstructure#Graphic and other intergrowth textures|intergrowth textures]] exhibited, for example, by [[granophyre]].<ref>{{cite web | last = Fichter | first = Lynn S. | year = 2000 | url = http://csmres.jmu.edu/geollab/Fichter/IgnRx/Phasdgrm.html | title = Igneous Phase Diagrams | work = Igneous Rocks | publisher = James Madison University | access-date = 2006-04-29 | archive-date = 2011-06-28 | archive-url = https://web.archive.org/web/20110628195112/http://csmres.jmu.edu/geollab/Fichter/IgnRx/Phasdgrm.html | url-status = dead }}</ref>
* Some inks are eutectic mixtures, allowing [[inkjet printer]]s to operate at lower temperatures.<ref>{{cite patent |country=US |number=5298062A |title=Eutectic compositions for hot melt jet inks |pubdate=1994-03-29 |gdate=1994-03-29 |fdate=1992-08-19 |pridate=1992-08-19 |inventor1-last=Davies |inventor1-first=Nicholas A. |inventor2-last=Nicholas |inventor2-first=Beatrice M.}}</ref>
* [[Choline]] chloride produces eutectic mixtures with many natural products such as [[citric acid]], [[malic acid]] and [[sugars]]. These liquid mixtures can be used, for example, to obtain antioxidant and antidiabetic extracts from [[natural product]]s.<ref>{{Cite journal |last1=Socas-Rodriguez |first1=Bárbara |last2=Torres-Cornejo |first2=Mónica Vanesa |last3=Álvarez-Rivera |first3=Gerardo |last4=Mendiola |first4=Jose A. |date=May 2021 |title=Deep Eutectic Solvents for the Extraction of Bioactive Compounds from Natural Sources and Agricultural By-Products |journal=Applied Sciences  |volume=11 |issue=1 |pages=4897 |doi=10.3390/app11114897 |issn=2076-3417 |doi-access=free |hdl=10261/253199 |hdl-access=free }}</ref>