Henry's Law Constants

Rolf Sander

Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany


Henry's Law Constants





Contact, Imprint, 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

A new version is currently under peer review:

R. Sander: Compilation of Henry's law constants (version 5.0.0-rc.0) for water as solvent, doi:10.5194/egusphere-2023-1584

The database on this web page will be updated to version 5.0.0 when the peer review of the manuscript is completed.

Henry's Law ConstantsInorganic speciesIodine (I) → iodine (molecular)

CAS RN:7553-56-2

Hscp d ln Hs cp / d (1/T) References Type Notes
[mol/(m3Pa)] [K]
2.8×10−2 4300 Eguchi et al. (1973) M
2.8×10−2 3900 Fogg and Sangster (2003) V
3.0×10−2 4400 Palmer et al. (1985) R
3.1×10−2 4600 Berdnikov and Bazhin (1970) R
3.2×10−2 4800 Wagman et al. (1982) T
1.1×10−2 Thompson and Zafiriou (1983) C 69)


The first column contains Henry's law solubility constant Hscp at the reference temperature of 298.15 K.
The second column contains the temperature dependence d ln Hs cp / d (1/T), also at the reference temperature.


  • Berdnikov, V. M. & Bazhin, N. M.: Oxidation-reduction potentials of certain inorganic radicals in aqueous solutions, Russ. J. Phys. Chem., 44, 395–398 (1970).
  • Eguchi, W., Adachi, M., & Yoneda, M.: Dependency of partition equilibrium of iodine between air and aqueous solution containing sodium hydroxide upon temperature and concentration, J. Chem. Eng. Jpn., 6, 389–396, doi:10.1252/JCEJ.6.389 (1973).
  • Fogg, P. & Sangster, J.: Chemicals in the Atmosphere: Solubility, Sources and Reactivity, John Wiley & Sons, Inc. (2003).
  • Palmer, D. A., Ramette, R. W., & Mesmer, R. E.: The hydrolysis of iodine: Equilibria at high temperatures, J. Nucl. Mater., 130, 280–286, doi:10.1016/0022-3115(85)90317-4 (1985).
  • Thompson, A. M. & Zafiriou, O. C.: Air-sea fluxes of transient atmospheric species, J. Geophys. Res., 88C, 6696–6708, doi:10.1029/JC088IC11P06696 (1983).
  • Wagman, D. D., Evans, W. H., Parker, V. B., Schumm, R. H., Halow, I., Bailey, S. M., Churney, K. L., & 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.


69) Thompson and Zafiriou (1983) quote a paper as the source that gives only the solubility but not the Henry's law constant.

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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