Dichlorodifluoromethane

• Formula: CCl₂F₂
• Molecular weight: 120.914
• IUPAC Standard InChI: InChI=1S/CCl2F2/c2-1(3,4)5 Copy

  
• IUPAC Standard InChIKey: PXBRQCKWGAHEHS-UHFFFAOYSA-N Copy
• CAS Registry Number: 75-71-8
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Methane, dichlorodifluoro-; Algofrene Type 2; Arcton 12; Arcton 6; Chlorofluoromethane (CCl2F2); Difluorodichloromethane; Electro-CF 12; F 12; Freon 12; Frigen 12; FC 12; Genetron 12; Isceon 122; Isotron 12; Ledon 12; R 12; R 12, Refrigerant; Refrigerant 12; CF2Cl2; Fluorocarbon 12; Propellant 12; Dwuchlorodwufluorometan; Eskimon 12; Freon F-12; Kaiser chemicals 12; Rcra waste number U075; Ucon 12; Ucon 12/halocarbon 12; UN 1028; CCl2F2; Halon 122; CFC-12; Halocarbon 12; Isotron 2; Propellent 12; Refrigerant R12; Chlorofluorocarbon 12; Dymel 12; FCC 12; FKW 12; Forane 12
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Henry's Law data
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
  • Fluid Properties
• Data at other public NIST sites:
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  • Gas Phase Kinetics Database
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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Henry's Law data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Condensed phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Henry's Law data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Henry's Law data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Kolesov, Zenkov, et al., 1963
Kolesov, V.P.; Zenkov, I.D.; Skuratov, S.M., Standard enthalpies of formation of chlorotrifluoromethane and dichlorodifluoromethane, Russ. J. Phys. Chem. (Engl. Transl.), 1963, 37, 378-379. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Wartenberg and Schiefer, 1955
Wartenberg, H.V.; Schiefer, J., Bildungswarmen von fluor-chlor-kohlenstoff-verbindungen, Z. Anorg. Chem., 1955, 278, 326-332. [all data]

Kirkbride and Davidson, 1954
Kirkbride, F.W.; Davidson, F.G., Heats of formation of gaseous fluoro- and fluorochloro-carbons, Nature (London), 1954, 174, 79-80. [all data]

Buffington and Fleischer, 1931
Buffington, R.M.; Fleischer, J., Thermodynamic properties of dichlorodifluoromethane, a new refrigerant. IV. Specific heat of liquid and vapor and latent heat of vaporization, Ind. Eng. Chem., 1931, 23, 1290-1292. [all data]

PCR Inc., 1990
PCR Inc., Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]

Krauss and Stephan, 1989
Krauss, R.; Stephan, K., Thermal Conductivity of Refrigerants in a Wide Range of Temperature and Pressure, J. Phys. Chem. Ref. Data, 1989, 18, 43. [all data]

Streng, 1971
Streng, A.G., Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature, J. Chem. Eng. Data, 1971, 16, 357. [all data]

Awbery and Griffiths, 1936
Awbery, J.H.; Griffiths, E., The Viscosities of Some Liquid Refrigerants, Proc. Phys. Soc. London, 1936, 48, 372-80. [all data]

Thornton, Burg, et al., 1933
Thornton, N.V.; Burg, A.B.; Schlesinger, H.I., The Behaviour of Dichlorodifluoromethane and of Chlorotrifluoromethane in the Electric Discharge, J. Am. Chem. Soc., 1933, 55, 3177. [all data]

Blanke and Weiss, 1991
Blanke, W.; Weiss, R., Thermodynamic properties of refrigerants. Part I: the triple points of the refrigerants R11, R12, R22, R142b, and 152a, PTB-Mitt., 1991, 101, 337-9. [all data]

Altunin, Geller, et al., 1987
Altunin, V.V.; Geller, V.Z.; Kremenvskaya, E.A.; Perel'shtein, I.I.; Petrov, E.K., Thermophysical Properties of Freons, Methane Ser. Part 2, Vol. 9, NSRDS-USSR, Selover, T. B., Ed., Hemisphere, New York, 1987. [all data]

Okada, Uematsu, et al., 1986
Okada, M.; Uematsu, M.; Watanabe, K., Orthobaric liquid densities of trichloro-fluoromethane, dichlorodi-fluoromethane, chlorodifluoromethane, 1,1,2-trichlorotrifluoroethane, 1,2-dichlorotetrafluoroethane, and of the azeotropic mixtur, J. Chem. Thermodyn., 1986, 18, 527. [all data]

Higashi, Okazaki, et al., 1984
Higashi, Y.; Okazaki, S.; Takaishi, Y.; Uematsu, M.; Watanabe, K., Measurements of the Vapor-Liquid Coexistence Curve for the Binary R12 + R22 System in the Critical Region, J. Chem. Eng. Data, 1984, 29, 31-6. [all data]

Michels, Wassenaar, et al., 1966
Michels, A.; Wassenaar, T.; Wolkers, G.J.; Prins, Chr.; van de Klundert, L., P-v-t data and thermodynamical properties of freon-12 (ccl(2)f(2)) and freon-13 (cclf(3)) fluorocarbons at temperatures between 0 and 150c and at pressures up to 400 atm, J. Chem. Eng. Data, 1966, 11, 449. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Kudchadker, Kudchadker, et al., 1979
Kudchadker, A.P.; Kudchadker, S.A.; Shukla, R.P.; Patnaik, P.R., Vapor pressures and boiling points of selected halomethanes, J. Phys. Chem. Ref. Data, 1979, 8, 2, 499, https://doi.org/10.1063/1.555600 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Pearson and McConnell, 1975
Pearson, C.R.; McConnell, G., Chlorinated C1 and C2 Hydrocarbons in the Marine Environment, Proc. R. Soc. London, B, 1975, 189, 305-332. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Pc	Critical pressure
  Ptriple	Triple point pressure
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔvapH	Enthalpy of vaporization
  ρc	Critical density

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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