Dichlorodifluoromethane

Dichlorodifluoromethane
Names
	Preferred IUPAC name Dichlorodi(fluoro)methane
	Other names Dichlorodifluoromethane; Carbon dichloride difluoride; Dichloro-difluoro-methane; Difluorodichloromethane; Freon 12; R-12; CFC-12; P-12; Propellant 12; Halon 122; Arcton 6; Arcton 12; E940; Fluorocarbon 12; Genetron 12; Refrigerant 12;
Identifiers
CAS Number	75-71-8 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL2106634 ;
ChemSpider	6151 ;
ECHA InfoCard	100.000.813
EC Number	200-893-9;
E number	E940 (glazing agents, ...)
KEGG	D03789 ;
PubChem CID	6391;
RTECS number	PA8200000;
UNII	OFM06SG1KO ;
UN number	1028
CompTox Dashboard (EPA)	DTXSID6020436 ;
	InChI InChI=1S/CCl2F2/c2-1(3,4)5 Key: PXBRQCKWGAHEHS-UHFFFAOYSA-N ; InChI=1/CCl2F2/c2-1(3,4)5 Key: PXBRQCKWGAHEHS-UHFFFAOYAX;
	SMILES ClC(Cl)(F)F;
Properties
Chemical formula	CCl2F2
Molar mass	120.91 g·mol−1
Appearance	Colorless gas
Odor	ether-like at very high concentrations
Density	1.486 g/cm3 (−29.8 °C (−21.6 °F))
Melting point	−157.7 °C (−251.9 °F; 115.5 K)
Boiling point	−29.8 °C (−21.6 °F; 243.3 K)
Solubility in water	0.286 g/L at 20 °C (68 °F)
Solubility in alcohol, ether, benzene, acetic acid	Soluble
log P	2.16
Vapor pressure	568 kPa (20 °C (68 °F))
Henry's law; constant (kH)	0.0025 mol kg−1 bar−1
Magnetic susceptibility (χ)	−52.2·10−6 cm3/mol
Thermal conductivity	0.0097 W/(m·K) (300 K)
Structure
Molecular shape	Tetrahedral
Dipole moment	0.51 D
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H336, H420
Precautionary statements	P261, P271, P304+P340, P319, P403+P233, P405, P410+P403, P501, P502
NFPA 704 (fire diamond)	0 0 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LC50 (median concentration)	760,000 ppm (mouse, 30 min); 800,000 ppm (rabbit, 30 min); 800,000 ppm (guinea pig, 30 min); 600,000 ppm (rat, 2 h)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1000 ppm (4950 mg/m3)
REL (Recommended)	TWA 1000 ppm (4950 mg/m3)
IDLH (Immediate danger)	15000 ppm
Supplementary data page
	Dichlorodifluoromethane (data page)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Dichlorodifluoromethane (R-12) is a colorless gas popularly known by the genericized brand name Freon (as Freon-12). It is a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant. In compliance with the Montreal Protocol, its manufacture was banned in developed countries (non-article 5 countries) in 1996, and in developing countries (Article 5 countries) in 2010 out of concerns about its damaging effect on the ozone layer. Its only allowed usage is as a fire retardant in submarines and aircraft. It is soluble in many organic solvents. R-12 cylinders are colored white.