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Greenhouse gas
1,1-Dichloro-1-fluoroethane
Другие языки:

1,1-Dichloro-1-fluoroethane

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1,1-Dichloro-1-fluoroethane
Structures of 1,1-dichloro-1-fluoroethane
Dichlorofluoroethane molecule
Names
Preferred IUPAC name
1,1-Dichloro-1-fluoroethane
Other names
Dichlorofluoroethane; R-141b; HCFC-141b
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.100.575
EC Number
  • 404-080-1
PubChem CID
RTECS number
  • KI0997000
UNII
UN number 9274
  • InChI=1S/C2H3Cl2F/c1-2(3,4)5/h1H3 checkY
    Key: FRCHKSNAZZFGCA-UHFFFAOYSA-N checkY
  • InChI=1/C2H3Cl2F/c1-2(3,4)5/h1H3
    Key: FRCHKSNAZZFGCA-UHFFFAOYAI
  • ClC(Cl)(F)C
Properties
C2H3Cl2F
Molar mass 116.94 g·mol−1
Appearance Colorless liquid, ethereal odor
Density 1.25 g/cm3 at 20 °C
Melting point −103.5 °C (−154.3 °F; 169.7 K)
Boiling point 32 °C (90 °F; 305 K)
4 g/L (20 °C)
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H412, H420
P273, P501, P502
532 °C (990 °F; 805 K)
Explosive limits 5.6–17.7% vol.
Lethal dose or concentration (LD, LC):
5 g/kg (rat, oral)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

1,1-Dichloro-1-fluoroethane is a haloalkane with the formula C
2H
3Cl
2F. It is one of the three isomers of dichlorofluoroethane. It belongs to the hydrochlorofluorocarbon (HCFC) family of man-made compounds that contribute significantly to both ozone depletion and global warming when released into the environment.

Physiochemical properties

1,1-Dichloro-1-fluoroethane can be a non-flammable, colourless liquid under room-temperature atmospheric conditions. The compound is very volatile with a boiling point of 32°C. Its critical temperature is near 204°C. Its smell has been described as "usually ethereal" (like ether).

Production and use

1,1-Dichloro-1-fluoroethane is mainly used as a solvent and foam blowing agent under the names R-141b and HCFC-141b. It is a class 2 ozone depleting substance undergoing a global phaseout from production and use under the Montreal Protocol since the late 1990s. It is being replaced by HFCs within some applications.

Environmental effects

Growth of HCFC-141b in Earth's atmosphere since year 1993.

The concentration of HCFC-141b in the atmosphere grew to near 25 parts per trillion by year 2016. It has an ozone depletion potential (ODP) of 0.12. This is low compared to the ODP=1 of trichlorofluoromethane (CFC-11, R-11), which also grew about ten times more abundant in the atmosphere prior to introduction of HFC-141b and subsequent adoption of the Montreal Protocol.

HFC-141b is also a minor but potent greenhouse gas. It has an estimated lifetime of about 10 years and a 100-year global warming potential ranging 725 to 2500. This compares to the GWP=1 of carbon dioxide, which had a much greater atmospheric concentration near 400 parts per million in year 2020.

See also



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