:1,1,1-Trichloro-2,2,2-trifluoroethane
{{Short description|Organic molecule of anthropogenic origin implicated in ozone depletion}}
{{chembox
| Watchedfields =
| verifiedrevid =
| ImageFileL1=1,1,1-trichloro-2,2,2-trifluoroethane.svg
| ImageFileR1=1,1,1-Trichloro-2,2,2-trifluoroethane 3D.png
| PIN=1,1,1-Trichloro-2,2,2-trifluoroethane
| OtherNames=CFC-113a
Freon 113a
Arcton 63
Freon-FT
1,1,1-Trichloro-2,2,2-trifluoroethane
1,1,1-Trichlorotrifluoroethane
1,1,1-Trifluoro-2,2,2-trichloroethane
1,1,1-Trifluorotrichloroethane
FC 113
FC133a
Precision cleaning agent
TF
T-WD602
Unsymmetrical Trichlorotrifluoroethane
FC 113a
2,2,2-Trichloro-1,1,1-trifluoroethane
|Section1={{Chembox Identifiers
| PubChem = 9635
| ChemSpiderID = 9258
| StdInChI = 1S/C2Cl3F3/c3-1(4,5)2(6,7)8
| StdInChIKey = BOSAWIQFTJIYIS-UHFFFAOYSA-N
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 07H0R79HO0
| ChEMBL_Ref = {{ebicite|correct|EBI}}
| ChEMBL =
| CASNo=354-58-5
| CASNo_Ref = {{cascite|correct|CAS}}
| SMILES = FC(F)(F)C(Cl)(Cl)Cl
| EINECS=206-564-6
}}
|Section2={{Chembox Properties
| Formula={{chem2|CCl3CF3}}
| MolarMass=187.376 g/mol
| Appearance=Colourless liquid
| Density=1.579 g/mL{{cite web|url=http://www.chemblink.com/products/354-58-5.htm |title=1,1,1-Trichlorotrifluoroethane |work=chemblink.com |accessdate=10 March 2014}}{{cite web |url=http://www.fishersci.com/ecomm/servlet/msdsproxy?productName=AC157130100&productDescription=1,1,1-TRICHLOROTRIFLUORO+10ML&catNo=AC157130100&vendorId=VN00032119&storeId=10652 |title=Material Safety Data Sheet : 1,1,1-Trichlorotrifluoroethane |work=fishersci.com |accessdate=10 March 2014 |archive-date=10 March 2014 |archive-url=https://web.archive.org/web/20140310214618/http://www.fishersci.com/ecomm/servlet/msdsproxy?productName=AC157130100&productDescription=1,1,1-TRICHLOROTRIFLUORO+10ML&catNo=AC157130100&vendorId=VN00032119&storeId=10652 |url-status=dead }}
| MeltingPtC=13-14
| BoilingPtC=46
| Solubility=
}}
|Section3={{Chembox Hazards
| MainHazards=
| FlashPt=
| AutoignitionPt =
}}
}}
1,1,1-Trichloro-2,2,2-trifluoroethane, also called Asymmetrical trichlorotrifluoroethane or CFC-113a, is a chlorofluorocarbon (CFC) with the formula {{chem2|CCl3CF3}}.
Ozone depletion
A team of researchers at the University of East Anglia analysed unpolluted air samples from Tasmania dating from the period 1978 to 2012. They concluded that the CFCs{{which|date=August 2024}} they studied had started entering the atmosphere from anthropogenic sources in the 1960s and that while the abundance of certain CFCs had decreased, owing to the Montreal Protocol, the abundance of CFC-113a in the atmosphere was still growing.{{cite journal|last1=Laube|first1=Johannes C.|first2=Mike J. |last2=Newland |first3=Christopher |last3=Hogan |first4=Carl A. M. |last4=Brenninkmeijer |first5=Paul J. |last5=Fraser |first6=Patricia |last6=Martinerie |first7=David E. |last7=Oram |first8=Claire E. |last8=Reeves |first9=Thomas |last9=Röckmann |first10=Jakob |last10=Schwander |first11=Emmanuel |last11=Witrant |first12=William T. |last12=Sturges|title=Newly detected ozone-depleting substances in the atmosphere|journal=Nature Geoscience|volume=7|issue=4|pages=266–269|date=9 March 2014|doi=10.1038/ngeo2109|bibcode=2014NatGe...7..266L|s2cid=140544959 |url=https://boris.unibe.ch/71426/8/JCLaube-New%20CFCs-2014.pdf}} Its main source remained uncertain, but production of hydrofluorocarbons in East Asia was suspected.{{cite news|last=McGrath|first=Matt|title=Mysterious new man-made gases pose threat to ozone layer|work=BBC News|date=9 March 2014|url=https://www.bbc.com/news/science-environment-26485048|accessdate=10 March 2014}} Between 2012 and 2017, concentrations of the gas jumped by 40 percent.{{cite journal|last1=Adcock|first1=Karina |first2=Claire |last2=Reeves |first3=Lauren |last3=Gooch |first4=Emma |last4=Leedham Elvidge |first5=Matthew |last5=Ashfold |first6=Carl |last6=Brenninkmeijer |first7=Charles |last7=Chou |first8=Paul |last8=Fraser |first9=Ray |last9=Langenfelds |first10=Norfazrin |last10=Mohd Hanif |first11=Simon |last11=O'Doherty |first12=David |last12=Oram| first13=Chang-Feng |last13=Ou-Yang |first14=Siew Moi |last14=Phang |first15=Azizan Abu |last15=Samah |first16=Thomas |last16=Röckmann | first17=William |last17=Sturges |first18=Johannes |last18=Laube |title=Continued increase of CFC-113a (CCl3CF3) mixing ratios in the global atmosphere: emissions, occurrence and potential sources |journal=Atmospheric Chemistry and Physics |volume=18 |issue=7 |pages=4737–4751 |date=9 April 2018|doi=10.5194/acp-18-4737-2018 |bibcode=2018ACP....18.4737A |doi-access=free }} In 2020, the global mean concentration of CFC-113a was 1.02 parts per trillion with global emissions of 2.5 ± 0.4 ODP-Gg yr−1.{{cite journal |last1=Western |first1=Luke M. |last2=Vollmer | first2=Martin K. |title=Global increase of ozone-depleting chlorofluorocarbons from 2010 to 2020 |journal=Nature Geoscience |date=3 April 2023 |pages=309–313 |volume=16 |issue=4 |doi=10.1038/s41561-023-01147-w |bibcode=2023NatGe..16..309W |hdl=1983/9e103fef-e61c-49c7-a1a3-902540ec1d7c |s2cid=257941769 |display-authors=1|hdl-access=free }}
See also
References
{{reflist}}
{{DEFAULTSORT:Trichloro-2, 2, 2-Trifluoroethane, 1, 1, 1-}}
Category:Trifluoromethyl compounds