Dichlorofluoromethane

Structural formula
General
Surname	Dichlorofluoromethane
other names	R-21; Monofluorodichloromethane; Freon 21; Fluorodichloromethane; Dichloromonofluoromethane;
Molecular formula	CHCl 2 F
Brief description	colorless gas with an ethereal odor
External identifiers / databases
EC number	200-869-8
ECHA InfoCard	100,000,791
PubChem	6370
Wikidata	Q418163
properties
Molar mass	102.92 g mol −1
Physical state	gaseous
density	4.41 g cm −3 (15 ° C, 1 hPa)
Melting point	−135 ° C
boiling point	8.9 ° C
Vapor pressure	153 k Pa (20 ° C)
solubility	heavy in water (9.42 g l −1 )
safety instructions
H and P phrases	H: 280-420
	P: 410 + 403
MAK	Switzerland: 10 ml m −3 or 40 mg m −3
Global warming potential	179 (based on 100 years)
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dichlorofluoromethane is a chemical compound from the group of aliphatic, saturated fluorochlorohydrocarbons . It is a refrigerant and propellant that came to be known as Freon 21 , among other things .

properties

The density of the liquid phase of dichlorofluoromethane at the boiling point is 1.4048 kg / l at 1 bar and 15 ° C. The critical temperature is 178.5 ° C, the critical pressure is 51.7 bar, the critical density is 0.522 g / cm ³ , the triple point is at a temperature of −135 ° C (melting temperature). Dichlorofluoromethane is listed on the Montreal Protocol and its ozone depletion potential is 0.040. In addition, dichlorofluoromethane is a greenhouse gas with an average lifetime in the atmosphere of 1.7 years and a global warming potential of 148 over a century.

use

Dichlorofluoromethane was used in cooling technology as a refrigerant and as an inert propellant for aerosols and foams . Today its use is prohibited because of the ozone depletion potential.

Web links

Air Liquide: Gas Encyclopaedia Dichlorofluoromethane
Environmental Health Criteria (EHC) for PARTIALLY HALOGENATED CHLOROFLUROCARBONS

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Entry on dichlorofluoromethane in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
↑ Data sheet Dichlorofluoromethane from Sigma-Aldrich , accessed on May 7, 2015 ( PDF ).
↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 75-43-4 or dichlorofluoromethane ), accessed on November 2, 2015.
↑ G. Myhre, D. Shindell et al .: Climate Change 2013: The Physical Science Basis . Working Group I contribution to the IPCC Fifth Assessment Report. Ed .: Intergovernmental Panel on Climate Change . 2013, Chapter 8: Anthropogenic and Natural Radiative Forcing, pp. 24-39; Table 8.SM.16 ( PDF ).
↑ G. Myhre, D. Shindell, F.-M. Bréon, W. Collins, J. Fuglestvedt, J. Huang, D. Koch, J.-F. Lamarque, D. Lee, B. Mendoza, T. Nakajima, A. Robock, G. Stephens, T. Takemura, H. Zhang: Anthropogenic and Natural Radiative Forcing . In: Thomas F. Stocker, D. Qin, G.-K. Plattner, M. Tignor, SK Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex, PM Midgley (eds.): Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge / New York 2013, ISBN 978-1-107-66182-0 , Table 8.A.1.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on dichlorofluoromethane in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .

[Sigma-2] Data sheet Dichlorofluoromethane from Sigma-Aldrich , accessed on May 7, 2015 ( PDF ).

[3] Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 75-43-4 or dichlorofluoromethane ), accessed on November 2, 2015.

[4] G. Myhre, D. Shindell et al .: Climate Change 2013: The Physical Science Basis . Working Group I contribution to the IPCC Fifth Assessment Report. Ed .: Intergovernmental Panel on Climate Change . 2013, Chapter 8: Anthropogenic and Natural Radiative Forcing, pp. 24-39; Table 8.SM.16 ( PDF ).

[5] G. Myhre, D. Shindell, F.-M. Bréon, W. Collins, J. Fuglestvedt, J. Huang, D. Koch, J.-F. Lamarque, D. Lee, B. Mendoza, T. Nakajima, A. Robock, G. Stephens, T. Takemura, H. Zhang: Anthropogenic and Natural Radiative Forcing . In: Thomas F. Stocker, D. Qin, G.-K. Plattner, M. Tignor, SK Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex, PM Midgley (eds.): Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge / New York 2013, ISBN 978-1-107-66182-0 , Table 8.A.1.