Henry's Law Constants

Rolf Sander

NEW: Version 5.0.0 has been published in October 2023

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 5.0.0) for water as solvent, Atmos. Chem. Phys., 23, 10901-12440 (2023), doi:10.5194/acp-23-10901-2023

The publication from 2023 replaces that from 2015, which is now obsolete. Please do not cite the old paper anymore.

Henry's Law ConstantsInorganic speciesNitrogen (N) → nitrous acid

CAS RN:7782-77-6

Hscp d ln Hs cp / d (1/T) References Type Notes
[mol/(m3Pa)] [K]
4.8×10−1 4800 Schwartz and White (1981) L
4.7×10−1 4900 Becker et al. (1998) M
4.7×10−1 4900 Becker et al. (1996) M
4.8×10−1 4900 Park and Lee (1988) M
3.7×10−1 9000 Komiyama and Inoue (1978) M
4.7×10−1 4700 Martin (1984) T
4.8×10−1 4800 Chameides (1984) T
4.8×10−1 Seinfeld (1986) ? 21)


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.


  • Becker, K. H., Kleffmann, J., Kurtenbach, R., & Wiesen, P.: Solubility of nitrous acid (HONO) in sulfuric acid solutions, J. Phys. Chem., 100, 14 984–14 990, doi:10.1021/JP961140R (1996).
  • Becker, K. H., Kleffmann, J., Negri, R. M., & Wiesen, P.: Solubility of nitrous acid (HONO) in ammonium sulfate solutions, J. Chem. Soc. Faraday Trans., 94, 1583–1586, doi:10.1039/A800458G (1998).
  • Chameides, W. L.: The photochemistry of a remote marine stratiform cloud, J. Geophys. Res., 89, 4739–4755, doi:10.1029/JD089ID03P04739 (1984).
  • Komiyama, H. & Inoue, H.: Reaction and transport of nitrogen oxides in nitrous acid solutions, J. Chem. Eng. Jpn., 11, 25–32, doi:10.1252/JCEJ.11.25 (1978).
  • Martin, L. R.: Kinetic studies of sulfite oxidation in aqueous solution, in: SO2, NO and NO2 Oxidation Mechanisms: Atmospheric Considerations, edited by Calvert, J. G., pp. 63–100, Butterworth Publishers, Boston, MA, ISBN 0250405687 (1984).
  • Park, J.-Y. & Lee, Y.-N.: Solubility and decomposition kinetics of nitrous acid in aqueous solution, J. Phys. Chem., 92, 6294–6302, doi:10.1021/J100333A025 (1988).
  • Schwartz, S. E. & White, W. H.: Solubility equilibria of the nitrogen oxides and oxyacids in dilute aqueous solution, in: Advances in Environmental Science and Engineering, edited by Pfafflin, J. R. & Ziegler, E. N., vol. 4, pp. 1–45, Gordon and Breach Science Publishers, NY (1981).
  • Seinfeld, J. H.: Atmospheric Chemistry and Physics of Air Pollution, Wiley-Interscience Publication, NY, ISBN 0471828572 (1986).


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 (2023) for further details.


21) Several references are given in the list of Henry's law constants but not assigned to specific species.

The numbers of the notes are the same as in Sander (2023). References cited in the notes can be found here.

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