Dichlorofluoromethane

Dichlorofluoromethane
IUPAC name Dichlorofluoromethane
Other names Fluorodichloromethane, Monofluorodichloromethane, Dichloromonofluoromethane, Freon 21, Refrigerant 21, R 21, HCFC 21, Algofrene Type 5, Arcton 7, Halon 112, UN 1029
Identifiers
CAS number	75-43-4 Y
PubChem	6370
ChemSpider	6130 Y
UNII	7GAO4CRJ0B Y
EC number	200-869-8
ChEMBL	CHEMBL116813 Y
RTECS number	PA8400000
Jmol-3D images	Image 1
SMILES ClC(Cl)F
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
Properties
Molecular formula	CHCl2F
Molar mass	102.92 g/mol
Appearance	Colorless gas
Density	1.405 g/cm3 at 9 °C 1.366 kg/m3 at 25 °C
Melting point	-135 °C
Boiling point	8.92 °C
Solubility in water	9.420 g/l at 30 °C
log P	1.55
Vapor pressure	160 kPa
Hazards
R-phrases	R59
S-phrases	S59
Main hazards	Dangerous for the environment (N)
Autoignition temperature	522 °C
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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 517 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.

External links

• International Chemical Safety Card 1106
• NIOSH Pocket Guide to Chemical Hazards 0197
• Termochemistry data at chemnet.ru
• Entry at Air Gas Liquide Encyclopaedia