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
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.000.791 Edit this at Wikidata
EC Number
  • 200-869-8
RTECS number
  • PA8400000
UNII
UN number 1029
  • InChI=1S/CHCl2F/c2-1(3)4/h1H checkY
    Key: UMNKXPULIDJLSU-UHFFFAOYSA-N checkY
  • InChI=1/CHCl2F/c2-1(3)4/h1H
    Key: UMNKXPULIDJLSU-UHFFFAOYAU
  • ClC(Cl)F
Properties
CHCl2F
Molar mass 102.92 g/mol
Appearance Colorless gas
Odor Ether-like[1]
Density
  • 1.405 kg/m3 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·bar)−1
−48.8·10−6 cm3/mol
Thermal conductivity 0.0086 W/m·K (300 K)[2]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H420
P410+P403, P502
Flash point Non-flammable[1]
522 °C (972 °F; 795 K)
Lethal dose or concentration (LD, LC):
  • >800,000 mg/m3 (mouse, 2 hr)
  • 49,900 ppm (rat, 4 hr)[3]
  • 100,000 ppm (guinea pig, <1 hr)
  • 100,000 ppm (mouse, <1 hr)[3]
NIOSH (US health exposure limits):
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).
checkY verify (what is checkY☒N ?)

Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon with the formula CHCl2F. It is a colorless and odorless gas. It is produced by fluorination of chloroform using a catalyst such as antimony trifluoride:[4]

CHCl3 + HF → CHCl2F + HCl
  1. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0197". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Touloukian, Y.S., Liley, P.E., and Saxena, S.C. Thermophysical properties of matter - the TPRC data series. Volume 3. Thermal conductivity - nonmetallic liquids and gases. Data book. 1970.
  3. ^ a b "Dichloromonofluoromethane". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).