Chlorotrifluoromethane

Chlorotrifluoromethane, R-13, CFC-13, or Freon 13, is a non-flammable, non-corrosive chlorofluorocarbon (CFC) and also a mixed halomethane. It is used as a refrigerant, however, due to concerns about its ozone-depleting potential, its use has been phased out due to the Montreal Protocol.[2]

Chlorotrifluoromethane
Names
Preferred IUPAC name
Chloro(trifluoro)methane
Other names
Chlorotrifluoromethane
Monochlorotrifluoromethane
Trifluorochloromethane
Trifluoromethyl chloride
Trifluoromonochlorocarbon
Arcton 3
Freon 13
Genetron 13
R-13
CFC 13
UN 1022
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.000.814
EC Number
  • 200-894-4
RTECS number
  • PA6410000
UNII
Properties
CClF3
Molar mass 104.46 g/mol
Appearance Colorless gas with sweet odor
Density 1.526 g/cm3
Melting point −181 °C (−293.8 °F; 92.1 K)
Boiling point −81.5 °C (−114.7 °F; 191.7 K)
0.009% at 25 °C (77 °F)
Vapor pressure 3.263 MPa at 21 °C (70 °F)
Thermal conductivity 0.01217 W m−1 K−1 (300 K)[1]
Hazards
Main hazards Ozone depletor and asphyxiant
Safety data sheet ICSC 0420
Flash point Non-flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Preparation

It can be prepared by reacting carbon tetrachloride with hydrogen fluoride in the presence of a catalytic amount of antimony pentachloride:

CCl4 + 3HF → CClF3 + 3HCl

This reaction can also produce trichlorofluoromethane (CCl3F), dichlorodifluoromethane (CCl2F2) and tetrafluoromethane (CF4).[3]

Physical properties
Property Value
Density (ρ) at -127.8 °C (liquid) 1.603 g⋅cm−3
Density (ρ) at boiling point (gas) 6.94 kg⋅m−3
Density (ρ) at 15 °C (gas) 4.41 g⋅cm−3
Triple point temperature (Tt)
Critical temperature (Tc) 28.8 °C (302 K)
Critical pressure (pc) 3.86 MPa (38.6 bar)
Critical density (ρc) 5.5 mol⋅L−1
Latent heat of vaporization at boiling point 149.85 kJ⋅kg−1
Specific heat capacity at constant pressure (Cp) at -34.4 °C 0.06 kJ⋅mol−1⋅K−1
Specific heat capacity at constant volume (CV) at -34.4 °C 0.051 kJ⋅mol−1⋅K−1
Heat capacity ratio (к) at -34.4 °C 1.168016
Compressibility Factor (Z) at 15 °C 0.9896
Acentric factor (ω) 0.17166
Viscosity (η) at 0 °C (gas) 13.3 mPa⋅s (0.0133 cP)
Viscosity (η) at 25 °C (gas) 14.1 mPa⋅s (0.01440 cP)
Ozone depletion potential (ODP) 1 (CCl3F = 1)
Global warming potential (GWP) 14 000 (CO2 = 1)

References
  1. 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.
  2. Siegemund, Günter; Schwertfeger, Werner; Feiring, Andrew; Smart, Bruce; Behr, Fred; Vogel, Herward; McKusick, Blaine (2002). "Fluorine Compounds, Organic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a11_349.
  3. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 304. ISBN 978-0-08-037941-8.
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