Dichlorofluoromethane

Dichlorofluoromethane
Names
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, Genetron 21
Identifiers
75-43-4 Yes
ChEMBL ChEMBL116813 Yes
ChemSpider 6130 Yes
EC number 200-869-8
Jmol-3D images Image
PubChem 6370
RTECS number PA8400000
UNII 7GAO4CRJ0B Yes
Properties
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)
9.420 g/l at 30 °C
log P 1.55
Vapor pressure 160 kPa
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]
522 °C (972 °F; 795 K)
US health exposure limits (NIOSH):
TWA 1000 ppm (4200 mg/m3)[1]
TWA 10 ppm (40 mg/m3)[1]
5000 ppm[1]
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 "NIOSH Pocket Guide to Chemical Hazards #0197". National Institute for Occupational Safety and Health (NIOSH).

External links