1,1,2,2-tetrachloro-1,2-difluoroethane

Structural formula
General
Surname	1,1,2,2-tetrachloro-1,2-difluoroethane
other names	1,1,2,2-tetrachloro-1,2-difluoroethane ( IUPAC ) Tetrachloro-1,2-difluoroethane R 112 Freon 112 CFC-112
Molecular formula	C 2 Cl 4 F 2
Brief description	colorless solid
External identifiers / databases
CAS number 76-12-0 EC number 200-935-6 ECHA InfoCard 100,000,851 PubChem 6427 Wikidata Q2806548
properties
Molar mass	203.83 g mol −1
Physical state	firmly
density	1.6447 g cm −3
Melting point	26 ° C
boiling point	93 ° C
Vapor pressure	67.3 hPa (25 ° C)
solubility	practically insoluble in water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 420 P: 273-502
MAK	DFG : 200 ml m −3 or 1700 mg m −3 Switzerland: 200 ml m −3 or 1690 mg m −3
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

1,1,2,2-Tetrachloro-1,2-difluoroethane is a chemical compound from the group of saturated halogenated hydrocarbons .

Extraction and presentation

Tetrachloro-1,2-difluoroethane can be obtained by reacting perchlorethylene and hydrogen fluoride in the presence of a catalyst . The most important commercial process for CFC and HCFC production is the successive replacement of chlorine with fluorine using hydrogen fluoride or antimony pentafluoride . The extent of the chlorine exchange can be controlled by varying the concentration of hydrogen fluoride, the contact time or the reaction temperature.

properties

Tetrachloro-1,2-difluoroethane is a colorless, odorless to sweet-smelling solid that is practically insoluble in water. It has an ozone depletion potential of 1.

use

Tetrachloro-1,2-difluoroethane has been used as a dry cleaning agent for wool , cotton and leather materials in combination with other solvents . It was also used as a cleaning agent in electronics and as a propellant in the plastics industry. After the Montreal Protocol came into force , the connection is practically no longer used today.

Individual evidence

1. ↑ ^{a b c d e f g h i j k} Entry on tetrachloro-1,2-difluoroethane in the GESTIS substance database of the IFA , accessed on May 12, 2020(JavaScript required) .
2. ↑ Swiss Accident Insurance Fund (Suva): Limits - Current MAK and BAT values (search for 76-12-0 or 1,1,2,2-tetrachloro-1,2-difluoroethane ), accessed on May 12, 2020.
3. ↑ ^{a b} Entry on 1,1,2,2-TETRACHLORO-1,2-DIFLUOROETHANE in the Hazardous Substances Data Bank , accessed April 6, 2016.