Chlorotrifluoromethane

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Chlorotrifluoromethane
Chlorotrifluoromethane-2D.svg Chlorotrifluoromethane-3D-vdW.png
Identifiers
CAS number 75-72-9 YesY
PubChem 6392
ChemSpider 6152 YesY
EC number 200-894-4
RTECS number PA6410000
Jmol-3D images Image 1
Properties
Molecular formula CClF3
Molar mass 104.46 g/mol
Appearance Colorless gas with sweet odor
Density 1.526 g/cm3
Melting point -181 °C (91.2 K)
Boiling point -81.5 °C (191.7 K)
Solubility in water 0.009 % at 25 °C
Vapor pressure 3.263 MPa at 21 °C
Hazards
MSDS ICSC 0420
EU Index Not listed
Main hazards Ozone depletor
Flash point Non-flammable
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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.

Preparation[edit]

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

CCl4 + 3HF → CClF3 + 2HCl

This reaction can also produce trichlorofluoromethane (CCl3F), dichlorodifluoromethane (CCl2F2) and tetrafluoromethane (CF4).[1]

Physical properties[edit]

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) -181 °C (92 K)
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[edit]

  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 304. ISBN 0080379419. 

External links[edit]