1,2-Dichlorotetrafluoroethane

1,2-Dichlorotetrafluoroethane

Names
Preferred IUPAC name 1,2-Dichloro-1,1,2,2-tetrafluoroethane
Other names R-114, CFC-114, halon 242, cryofluorane, Freon 114, Genetron 114, Refrigerant 114
Identifiers
CAS Number	76-14-2 Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL325436 N
ChemSpider	6189 Y
ECHA InfoCard	100.000.853
EC Number	200-937-7
PubChem CID	6429
RTECS number	KI1101000
UNII	6B5VVT93AR N
UN number	1958
CompTox Dashboard (EPA)	DTXSID8026434
InChI InChI=1S/C2Cl2F4/c3-1(5,6)2(4,7)8 Key: DDMOUSALMHHKOS-UHFFFAOYSA-N
SMILES ClC(F)(F)C(F)(F)Cl
Properties
Chemical formula	C2Cl2F4
Molar mass	170.92 g/mol
Appearance	colorless gas[1]
Odor	faint, ether-like (high concentrations)[1]
Density	1.455 g/cm3
Melting point	−94 °C (−137 °F; 179 K)
Boiling point	3.5 °C (38.3 °F; 276.6 K)
Solubility in water	0.01%[1]
Vapor pressure	1.9 atm (21°C)[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Ozone depletor
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H420
Precautionary statements	P410+P403, P502
Flash point	nonflammable[1]
Lethal dose or concentration (LD, LC):
LC50 (median concentration)	720,000 ppm (rat, 30 min) 700,000 ppm (mouse, 30 min) 750,000 ppm (rabbit, 30 min)[2]
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1000 ppm (7000 mg/m3)[1]
REL (Recommended)	TWA 1000 ppm (7000 mg/m3)[1]
IDLH (Immediate danger)	15000 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

1,2-Dichlorotetrafluoroethane, or R-114, also known as cryofluorane (INN), is a chlorofluorocarbon (CFC) with the molecular formula ClF₂CCF₂Cl. Its primary use has been as a refrigerant. It is a non-flammable gas with a sweetish, chloroform-like odor with the critical point occurring at 145.6 °C and 3.26 MPa. When pressurized or cooled, it is a colorless liquid. It is listed on the Intergovernmental Panel on Climate Change's list of ozone depleting chemicals, and is classified as a Montreal Protocol Class I, group 1 ozone depleting substance.^[3]

When used as a refrigerant, R-114 is classified as a medium pressure refrigerant.

The U.S. Navy uses R-114 in its centrifugal chillers in preference to R-11 to avoid air and moisture leakage into the system. While the evaporator of an R-11 charged chiller runs at a vacuum during operation, R-114 yields approximately 0 psig operating pressure in the evaporator.

Manufactured and sold R-114 was usually mixed with the non symmetrical isomer 1,1-dichlorotetrafluoroethane (CFC-114a), as separation of the two isomers is difficult.^[4]

Aside from its immense environmental impacts, R114, like most chlorofluoroalkanes, forms phosgene gas when exposed to a naked flame.^[5]

• Material Safety Data Sheet from Honeywell International Inc., dated 22 August 2007.
• CDC - NIOSH Pocket Guide to Chemical Hazards