Dichlorofluoromethane

Dichlorofluoromethane

Names
Preferred IUPAC name Dichloro(fluoro)methane
Other names Dichlorofluoromethane Fluorodichloromethane Monofluorodichloromethane Dichloromonofluoromethane Freon 21 Refrigerant 21 R 21 HCFC 21 Algofrene Type 5 Arcton 7 Halon 112 UN 1029 Genetron 21
Identifiers
CAS Number	75-43-4 Y
3D model (Jmol)	Interactive image
ChEMBL	ChEMBL116813 Y
ChemSpider	6130 Y
ECHA InfoCard	100.000.791
EC Number	200-869-8
PubChem	6370
RTECS number	PA8400000
UNII	7GAO4CRJ0B Y
InChI InChI=1S/CHCl2F/c2-1(3)4/h1H Y Key: UMNKXPULIDJLSU-UHFFFAOYSA-N Y InChI=1/CHCl2F/c2-1(3)4/h1H Key: UMNKXPULIDJLSU-UHFFFAOYAU
SMILES ClC(Cl)F
Properties
Chemical formula	CHCl2F
Molar mass	102.92 g/mol
Appearance	Colorless gas
Odor	ether-like[1]
Density	1.405 g/cm3 at 9 °C 1.366 kg/m3 at 25 °C
Melting point	−135 °C (−211 °F; 138 K)
Boiling point	8.92 °C (48.06 °F; 282.07 K)
Solubility in water	9.420 g/l at 30 °C
log P	1.55
Vapor pressure	160 kPa
Henry's law constant (kH)	0.19 mol.kg−1.bar−1
Hazards
Main hazards	Dangerous for the environment (N)
R-phrases	R59
S-phrases	S59
Flash point	nonflammable [1]
Autoignition temperature	522 °C (972 °F; 795 K)
Lethal dose or concentration (LD, LC):
LC50 (median concentration)	>800,000 mg/m3 (mouse, 2 hr) 49,900 ppm (rat, 4 hr)[2]
LCLo (lowest published)	100,000 ppm (guinea pig, <1 hr) 100,000 ppm (mouse, <1 hr)[2]
US health exposure limits (NIOSH):
PEL (Permissible)	TWA 1000 ppm (4200 mg/m3)[1]
REL (Recommended)	TWA 10 ppm (40 mg/m3)[1]
IDLH (Immediate danger)	5000 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon. It is a colorless and odorless gas.

Its critical point is at 178.5 °C (451.7 K) and 5.17 MPa (51.7 bar). At temperatures from 5 K to 105 K it has one phase in the space group Pbca.

Uses

Dichlorofluoromethane was used as a propellant and refrigerant, but due to its ozone depletion it has been set to be phased out. It has ozone depletion potential 0.04. Production and consumption has been since 2004 reduced to 15% of level from 1989 and it is to be phased out in 2015 according to Montreal Protocol.

References

External links

• International Chemical Safety Card 1106
• "NIOSH Pocket Guide to Chemical Hazards #0197". National Institute for Occupational Safety and Health (NIOSH). 
• Termochemistry data at chemnet.ru
• Entry at Air Gas Liquide Encyclopaedia