1,1,1-Trichloro-2,2,2-trifluoroethane
Names
Preferred IUPAC name
1,1,1-Trichloro-2,2,2-trifluoroethane
Other names
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
CF3CCl3
FC 113
FC133a
Precision cleaning agent
TF
T-WD602
Trichlorotrifluoroethane unsymmetrical
FC 113a
2,2,2-Trichloro-1,1,1-trifluoro-ethane
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.005.968
EC Number
  • 206-564-6
UNII
  • InChI=1S/C2Cl3F3/c3-1(4,5)2(6,7)8
    Key: BOSAWIQFTJIYIS-UHFFFAOYSA-N
  • FC(F)(F)C(Cl)(Cl)Cl
Properties
CCl3CF3
Molar mass 187.376 g/mol
Appearance Colourless liquid
Density 1.579 g/mL[1][2]
Melting point 13–14 °C (55–57 °F; 286–287 K)
Boiling point 46 °C (115 °F; 319 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Asymmetrical trichlorotrifluoroethane, also called 1,1,1-Trichloro-2,2,2-trifluoroethane or CFC-113a is a chlorofluorocarbon (CFC). It has the formula CCl3CF3.

Environmental effects

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 CFC's 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.[3] Its source remained uncertain, but production of hydrofluorocarbons in East Asia was suspected by some.[4] Between 2012 and 2017, concentrations of the gas jumped by 40 percent.[5] In 2020, the global mean concentration of CFC-113a was 1.02 ppt with global emissions of 2.5 ± 0.4 ODP-Gg yr−1.[6]

See also

References

  1. ↑ "1,1,1-Trichlorotrifluoroethane". chemblink.com. Retrieved 10 March 2014.
  2. ↑ "Material Safety Data Sheet : 1,1,1-Trichlorotrifluoroethane". fishersci.com. Archived from the original on 10 March 2014. Retrieved 10 March 2014.
  3. ↑ Laube, Johannes C.; Newland, Mike J.; Hogan, Christopher; Brenninkmeijer, Carl A. M.; Fraser, Paul J.; Martinerie, Patricia; Oram, David E.; Reeves, Claire E.; Röckmann, Thomas; Schwander, Jakob; Witrant, Emmanuel; Sturges, William T. (9 March 2014). "Newly detected ozone-depleting substances in the atmosphere" (PDF). Nature Geoscience. 7 (4): 266–269. Bibcode:2014NatGe...7..266L. doi:10.1038/ngeo2109. S2CID 140544959.
  4. ↑ McGrath, Matt (9 March 2014). "Mysterious new man-made gases pose threat to ozone layer". BBC News. Retrieved 10 March 2014.
  5. ↑ Adcock, Karina; Reeves, Claire; Gooch, Lauren; Leedham Elvidge, Emma; Ashfold, Matthew; Brenninkmeijer, Carl; Chou, Charles; Fraser, Paul; Langenfelds, Ray; Mohd Hanif, Norfazrin; O'Doherty, Simon; Oram, David; Ou-Yang, Chang-Feng; Phang, Siew Moi; Samah, Azizan Abu; Röckmann, Thomas; Sturges, William; Laube, Johannes (9 April 2018). "Continued increase of CFC-113a (CCl3CF3) mixing ratios in the global atmosphere: emissions, occurrence and potential sources". Atmospheric Chemistry and Physics. 18 (7): 4737–4751. Bibcode:2018ACP....18.4737A. doi:10.5194/acp-18-4737-2018.
  6. ↑ Western, Luke M.; et al. (3 April 2023). "Global increase of ozone-depleting chlorofluorocarbons from 2010 to 2020". Nature Geoscience. 16 (4): 309–313. Bibcode:2023NatGe..16..309W. doi:10.1038/s41561-023-01147-w. hdl:1983/9e103fef-e61c-49c7-a1a3-902540ec1d7c. S2CID 257941769.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.