Henry's Law Constants

Rolf Sander

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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) → hypochlorous acid

CAS RN:7790-92-3

Hcp d ln Hcp / d (1/T) Reference Type Notes
[mol/(m3Pa)] [K]
6.5 5900 Sander et al. 2011 L
6.5 5900 Sander et al. 2006 L
6.5 5900 Huthwelker et al. 1995 L
9.1 Blatchley et al. 1992 M 9)
4.7 1600 Hanson and Ravishankara 1991 M 55)
6.0 4900 Holzwarth et al. 1984 M 56)
2.6 5100 Wagman et al. 1982 T
5.4 Hilal et al. 2008 Q


  • Blatchley, III, E. R., Johnson, R. W., Alleman, J. E., and McCoy, W. F.: Effective Henry's law constants for free chlorine and free bromine, Wat. Res., 26, 99-106, doi:10.1016/0043-1354(92)90117-M, 1992.
  • Hanson, D. R. and Ravishankara, A. R.: The reaction probabilities of ClONO2 and N2O5 on 40 to 75% sulfuric acid solutions, J. Geophys. Res., 96D, 17 307-17 314, doi:10.1029/91JD01750, 1991.
  • Hilal, S. H., Ayyampalayam, S. N., and Carreira, L. A.: Air-liquid partition coefficient for a diverse set of organic compounds: Henry's law constant in water and hexadecane, Environ. Sci. Technol., 42, 9231-9236, doi:10.1021/ES8005783, 2008.
  • Holzwarth, G., Balmer, R. G., and Soni, L.: The fate of chlorine and chloramines in cooling towers, Wat. Res., 18, 1421-1427, doi:10.1016/0043-1354(84)90012-5, 1984.
  • Huthwelker, T., Clegg, S. L., Peter, T., Carslaw, K., Luo, B. P., and Brimblecombe, P.: Solubility of HOCl in water and aqueous H2SO4 to stratospheric temperatures, J. Atmos. Chem., 21, 81-95, doi:10.1007/BF00712439, 1995.
  • 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.


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.


9) Value at T = 293 K.
55) This value was extrapolated from data at T = 215 K and T = 263 K.
56) Value at pH = 6.5.

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

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