2,2-dichloro-1,1,1-trifluoroethane

Structural formula
General
Surname	2,2-dichloro-1,1,1-trifluoroethane
other names	1,1-dichloro-2,2,2-trifluoroethane R-123 Freon 123
Molecular formula	C 2 HCl 2 F 3
Brief description	colorless liquid with a slightly ethereal odor
External identifiers / databases
CAS number 306-83-2 EC number 206-190-3 ECHA InfoCard 100.005.629 PubChem 9385 Wikidata Q1869625
properties
Molar mass	152.93 g mol −1
Physical state	liquid
density	1.48 g cm −3
Melting point	−107 ° C
boiling point	28 ° C
Vapor pressure	957 hPa (25 ° C)
solubility	sparingly soluble in water (2.1 g l −1 at 25 ° C)
Refractive index	1.36332 (15 ° C)
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 371-373-420 P: 260-270-309 + 311-405-502
Global warming potential	96 (based on 100 years)
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

2,2-dichloro-1,1,1-trifluoroethane is a chemical compound from the group of saturated halogenated hydrocarbons . It is isomeric to 1,2-dichloro-1,1,2-trifluoroethane (R-123a, CAS number: 354-23-4) and 1,1-dichloro-1,2,2-trifluoroethane (R-123b , CAS number: 812-04-4).

Extraction and presentation

2,2-dichloro-1,1,1-trifluoroethane can be produced by reacting tetrachloroethene with hydrogen fluoride in the gas phase. This is an exothermic reaction and requires a catalyst :

${\displaystyle \mathrm {Cl_{2}C{=}CCl_{2}+3\ HF\longrightarrow \ Cl_{2}CH{-}CF_{3}\ +2\ HCl} }$

properties

2,2-dichloro-1,1,1-trifluoroethane is a non-flammable, colorless liquid with a slightly ethereal odor that is sparingly soluble in water. It has a critical temperature of 185 ° C, a critical pressure of 37.9 bar, a global warming potential of 96 and an ozone depletion potential of 0.02.

use

2,2-dichloro-1,1,1-trifluoroethane was to replace the long refrigerant CFC-11 used in commercial refrigeration and air conditioning. Its use in new facilities has been banned since 2004, and since January 1, 2015, it has been banned completely (except for special applications) by the Montreal Protocol . This is regulated in Regulation (EC) No. 2037/2000 of the European Parliament and of the Council of June 29, 2000.

Individual evidence

1. ↑ ^{a b c d e f g h i j} Entry on 2,2-dichloro-1,1,1-trifluoroethane in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
2. ↑ ^{a b} Entry on 2,2-dichloro-1,1,1-trifluoroethane in the Hazardous Substances Data Bank , accessed on March 10, 2013.
3. ↑ 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 ).
4. ↑ KF Dehon Kälte specialist sales: R-123
5. ↑ Regulation (EC) No. 2037/2000. (PDF) In: www.bmub.bund.de. Retrieved May 30, 2015 .