Henry's Law Constants

Rolf Sander

This page is obsolete, the new page is here:

Please update your bookmarks!

(This page may still be available for a while, but it won't be updated anymore)

Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany


Henry's Law Constants




Contact, Impressum, Acknowledgements

When referring to the compilation of Henry's Law Constants, please cite this publication:

R. Sander: Compilation of Henry's law constants (version 4.0) for water as solvent, Atmos. Chem. Phys., 15, 4399-4981 (2015), doi:10.5194/acp-15-4399-2015

Henry's Law ConstantsInorganic speciesChlorine (Cl) → chlorine (molecular)

CAS RN:7782-50-5

Hcp d ln Hcp / d (1/T) Reference Type Notes
[mol/(m3Pa)] [K]
9.2×10−4 2000 Sander et al. 2011 L
9.2×10−4 2000 Sander et al. 2006 L
9.0×10−4 2500 Wilhelm et al. 1977 L
3.8×10−2 3100 Martikainen et al. 1987 M 46)
7.5×10−4 Lin and Pehkonen 1998 R
6.1×10−4 3200 Brian et al. 1962 R
6.1×10−4 2800 Wagman et al. 1982 T
9.3×10−4 2100 Young 1983 X 5)
9.1×10−4 Bartlett and Margerum 1999 ? 7) 47)
9.2×10−4 2300 Dean 1992 ? 6)
Kruis and May 1962 ? 48)


  • Bartlett, W. P. and Margerum, D. W.: Temperature dependencies of the Henry's law constant and the aqueous phase dissociation constant of bromine chloride, Environ. Sci. Technol., 33, 3410-3414, doi:10.1021/ES990300K, 1999.
  • Brian, P. L. T., Vivian, J. E., and Habib, A. G.: The effect of the hydrolysis reaction upon the rate of absorption of chlorine into water, AIChE J., 8, 205-209, doi:10.1002/AIC.690080215, 1962.
  • Dean, J. A.: Lange's Handbook of Chemistry, McGraw-Hill, Inc., 1992.
  • Kruis, A. and May, A.: Lösungsgleichgewichte von Gasen mit Flüssigkeiten, in: Landolt-Börnstein II/2b, edited by Schäfer, K. and Lax, E., pp. (1-1)-(1-210), Springer Verlag, Berlin, 1962.
  • Lin, C.-J. and Pehkonen, S. O.: Oxidation of elemental mercury by aqueous chlorine (HOCl/OCl): Implications for tropospheric mercury chemistry, J. Geophys. Res., 103D, 28 093-28 102, doi:10.1029/98JD02304, 1998.
  • Martikainen, P., Salmi, T., Paatero, E., Hummelstedt, L., Klein, P., Damén, H., and Lindroos, T.: Kinetics of homogeneous catalytic chlorination of acetic acid, J. Chem. Tech. Biotechnol., 40, 259-274, doi:10.1002/JCTB.280400405, 1987.
  • Sander, S. P., Friedl, R. R., Golden, D. M., Kurylo, M. J., Moortgat, G. K., Keller-Rudek, H., Wine, P. H., Ravishankara, A. R., Kolb, C. E., Molina, M. J., Finlayson-Pitts, B. J., Huie, R. E., and Orkin, V. L.: Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies, Evaluation Number 15, JPL Publication 06-2, Jet Propulsion Laboratory, Pasadena, CA,, 2006.
  • Sander, S. P., Abbatt, J., Barker, J. R., Burkholder, J. B., Friedl, R. R., Golden, D. M., Huie, R. E., Kolb, C. E., Kurylo, M. J., Moortgat, G. K., Orkin, V. L., and Wine, P. H.: Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies, Evaluation No. 17, JPL Publication 10-6, Jet Propulsion Laboratory, Pasadena,, 2011.
  • Wagman, D. D., Evans, W. H., Parker, V. B., Schumm, R. H., Halow, I., Bailey, S. M., Churney, K. L., and Nuttall, R. L.: The NBS tables of chemical thermodynamic properties; Selected values for inorganic and C1 and C2 organic substances in SI units, J. Phys. Chem. Ref. Data, 11, suppl. 2, 1982.
  • Wilhelm, E., Battino, R., and Wilcock, R. J.: Low-pressure solubility of gases in liquid water, Chem. Rev., 77, 219-262, doi:10.1021/CR60306A003, 1977.
  • Young, C. L., ed.: IUPAC Solubility Data Series, vol. 12 of Sulfur Dioxide, Chlorine, Fluorine and Chlorine Oxides , Pergamon Press, Oxford, England, 1983.


Table entries are sorted according to reliability of the data, listing the most reliable type first: L) literature review, M) measured, V) VP/AS = vapor pressure/aqueous solubility, R) recalculation, T) thermodynamical calculation, X) original paper not available, C) citation, Q) QSPR, E) estimate, ?) unknown, W) wrong. See Section 3.1 of Sander (2015) for further details.


5) Value given here as quoted by Lide and Frederikse (1995).
6) Only the tabulated data between T = 273 K and T = 303 K from Dean (1992) were used to derive H and its temperature dependence. Above T = 303 K, the tabulated data could not be parameterized very well. The partial pressure of water vapor (needed to convert some Henry's law constants) was calculated using the formula given by Sander et al. (1995). The quantities A and α from Dean (1992) were assumed to be identical.
7) Several references are given in the list of Henry's law constants but not assigned to specific species.
46) Extrapolated from data measured between 70 °C and 110 °C.
47) The value of ∆H° listed in Table 2 of Bartlett and Margerum (1999) is incorrect.
48) Kruis and May (1962) claim that Cl2 does not obey Henry's law. Looking at their interpolation formula, however, it seems that this is only because they did not consider the equilibrium Cl2 + H2O ↔ HOCl + HCl.

The numbers of the notes are the same as in Sander (2015). References cited in the notes can be found here.

* * *

Search Henry's Law Database

Species Search:

Identifier Search:

Reference Search:

* * *

Convert Henry's Law Constants


* * *