Dichlorofluoromethane

From Wikipedia, the free encyclopedia

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]
PubChem	6370
EINECS number	200-869-8
RTECS number	PA8400000
SMILES	C(F)(Cl)Cl
InChI	1/CHCl2F/c2-1(3)4/h1H
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
Main hazards	Dangerous for the environment (N)
R-phrases	R59
S-phrases	S59
Autoignition temperature	522 °C
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and 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.

[edit] 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.