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Dichlorofluoromethane

May 02, 2024

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]

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
  • 75-43-4 Y
3D model (JSmol)
  • Interactive image
ChEMBL
  • ChEMBL116813 Y
ChemSpider
  • 6130 Y
ECHA InfoCard 100.000.791
EC Number
  • 200-869-8
  • 6370
RTECS number
  • PA8400000
UNII
  • 7GAO4CRJ0B Y
UN number 1029
  • DTXSID7052498
  • 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
  • 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:
Warning
H280, 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).
Y verify (what is YN ?)
CHCl3 + HF → CHCl2F + HCl

Uses edit

Dichlorofluoromethane was used as a propellant and refrigerant. Due to its role in ozone depletion, dichlorofluoromethane has been largely 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.

Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene:[4]

3 CHCl2F + 3 CH2ClF → C6F6 + 9 HCl

Additional physical data edit

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.

Safety edit

Its toxicity is comparable to that of chloroform. Its TLV is 10 ppm.[4]

References edit

  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. ^ a b c Dagani, M. J.; Barda, H. J.; Benya, T. J.; Sanders, D. C. "Bromine Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a04_405. ISBN 978-3527306732.

External links edit

May 02, 2024
dichlorofluoromethane, freon, halomethane, hydrochlorofluorocarbon, with, formula, chcl2f, colorless, odorless, produced, fluorination, chloroform, using, catalyst, such, antimony, trifluoride, names, preferred, iupac, name, dichloro, fluoro, methane, other, 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 Dichlorofluoromethane Names Preferred IUPAC name Dichloro fluoro methane Other names DichlorofluoromethaneFluorodichloromethaneMonofluorodichloromethaneDichloromonofluoromethaneFreon 21Refrigerant 21R 21HCFC 21Algofrene Type 5Arcton 7Halon 112UN 1029Genetron 21 Identifiers CAS Number 75 43 4 Y 3D model JSmol Interactive image ChEMBL ChEMBL116813 Y ChemSpider 6130 Y ECHA InfoCard 100 000 791 EC Number 200 869 8 PubChem CID 6370 RTECS number PA8400000 UNII 7GAO4CRJ0B Y UN number 1029 CompTox Dashboard EPA DTXSID7052498 InChI InChI 1S CHCl2F c2 1 3 4 h1H YKey UMNKXPULIDJLSU UHFFFAOYSA N YInChI 1 CHCl2F c2 1 3 4 h1HKey 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 kg m3 at 9 C1 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 lawconstant kH 0 19 mol kg bar 1 Magnetic susceptibility x 48 8 10 6 cm3 mol Thermal conductivity 0 0086 W m K 300 K 2 Hazards GHS labelling Pictograms Signal word Warning Hazard statements H280 H420 Precautionary statements P410 P403 P502 Flash point Non flammable 1 Autoignitiontemperature 522 C 972 F 795 K Lethal dose or concentration LD LC LC50 median concentration gt 800 000 mg m3 mouse 2 hr 49 900 ppm rat 4 hr 3 LCLo lowest published 100 000 ppm guinea pig lt 1 hr 100 000 ppm mouse lt 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 Y verify what is Y N Infobox references CHCl3 HF CHCl2F HCl Contents 1 Uses 2 Additional physical data 3 Safety 4 References 5 External linksUses editDichlorofluoromethane was used as a propellant and refrigerant Due to its role in ozone depletion dichlorofluoromethane has been largely 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 Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene 4 3 CHCl2F 3 CH2ClF C6F6 9 HClAdditional physical data editIts 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 Safety editIts toxicity is comparable to that of chloroform Its TLV is 10 ppm 4 References edit a b c d e NIOSH Pocket Guide to Chemical Hazards 0197 National Institute for Occupational Safety and Health NIOSH 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 a b Dichloromonofluoromethane Immediately Dangerous to Life or Health Concentrations IDLH National Institute for Occupational Safety and Health NIOSH a b c Dagani M J Barda H J Benya T J Sanders D C Bromine Compounds Ullmann s Encyclopedia of Industrial Chemistry Weinheim Wiley VCH doi 10 1002 14356007 a04 405 ISBN 978 3527306732 External links editInternational 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 Archived 2021 02 18 at the Wayback Machine Retrieved from https en wikipedia org w index php title Dichlorofluoromethane amp oldid 1157145916, wikipedia, wiki, book, books, library,

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