Chlorotrifluoromethane

Chlorotrifluoromethane

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Names
IUPAC name Chlorotrifluoromethane
Other names Monochlorotrifluoromethane, Trifluorochloromethane, Trifluoromethyl chloride, Trifluoromonochlorocarbon, Arcton 3, Freon 13, Genetron 13, R-13, CFC 13, UN 1022
Identifiers
CAS Number	75-72-9 Y
ChemSpider	6152 Y
EC Number	200-894-4
Jmol 3D model	Interactive image
PubChem	6392
RTECS number	PA6410000
InChI InChI=1S/CClF3/c2-1(3,4)5 Y Key: AFYPFACVUDMOHA-UHFFFAOYSA-N Y InChI=1/CClF3/c2-1(3,4)5 Key: AFYPFACVUDMOHA-UHFFFAOYAV
SMILES ClC(F)(F)F
Properties
Chemical formula	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)
Solubility in water	0.009 % at 25 °C (77 °F)
Vapor pressure	3.263 MPa at 21 °C (70 °F)
Vapor pressure	{{{value}}}
Except where otherwise noted, 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

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).

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)

External links

• MSDS at mathesontrigas.com
• International Chemical Safety Card 0420
• Entry at Air Liquide gas encyclopaedia
• The crystal structure of chlorotrifluoromethane, CF₃Cl; neutron powder diffraction and constrained refinement
• Termochemical data table