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 Please do not cite the old paper anymore.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) → nitric acid

CAS RN:7697-37-2

Hscp d ln Hs cp / d (1/T) References Type Notes
[mol/(m3Pa)] [K]
8.8×102 Durham et al. (1981) V
2.1×103 8700 Lelieveld and Crutzen (1991) R 101)
Clegg and Brimblecombe (1990) T 1) 102)
Brimblecombe and Clegg (1989) T 103)
2.6×104 8700 Chameides (1984) T
2.1×103 Schwartz and White (1981) T
2.1×103 Pandis and Seinfeld (1989) ? 104)
2.1×103 Seinfeld (1986) ? 21)
3.4×103 8800 Hoffmann and Jacob (1984) ? 21)
Brimblecombe and Clegg (1988) W 105)


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.


  • Brimblecombe, P. & Clegg, S. L.: The solubility and behaviour of acid gases in the marine aerosol, J. Atmos. Chem., 7, 1–18, doi:10.1007/BF00048251 (1988).
  • Brimblecombe, P. & Clegg, S. L.: Erratum, J. Atmos. Chem., 8, 95, doi:10.1007/BF00053818 (1989).
  • Chameides, W. L.: The photochemistry of a remote marine stratiform cloud, J. Geophys. Res., 89, 4739–4755, doi:10.1029/JD089ID03P04739 (1984).
  • Clegg, S. L. & Brimblecombe, P.: Equilibrium partial pressures and mean activity and osmotic coefficients of 0–100% nitric acid as a function of temperature, J. Phys. Chem., 94, 5369–5380, doi:10.1021/J100376A038 (1990).
  • Durham, J. L., Overton, Jr., J. H., & Aneja, V. P.: Influence of gaseous nitric acid on sulfate production and acidity in rain, Atmos. Environ., 15, 1059–1068, doi:10.1016/0004-6981(81)90106-2 (1981).
  • Hoffmann, M. R. & Jacob, D. J.: Kinetics and mechanisms of the catalytic oxidation of dissolved sulfur dioxide in aqueous solution: An application to nighttime fog water chemistry, in: SO2, NO and NO2 Oxidation Mechanisms: Atmospheric Considerations, edited by Calvert, J. G., pp. 101–172, Butterworth Publishers, Boston, MA, ISBN 0250405687 (1984).
  • Lelieveld, J. & Crutzen, P. J.: The role of clouds in tropospheric photochemistry, J. Atmos. Chem., 12, 229–267, doi:10.1007/BF00048075 (1991).
  • Pandis, S. N. & Seinfeld, J. H.: Sensitivity analysis of a chemical mechanism for aqueous-phase atmospheric chemistry, J. Geophys. Res., 94, 1105–1126, doi:10.1029/JD094ID01P01105 (1989).
  • 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.


1) A detailed temperature dependence with more than one parameter is available in the original publication. Here, only the temperature dependence at 298.15 K according to the van 't Hoff equation is presented.
21) Several references are given in the list of Henry's law constants but not assigned to specific species.
101) Lelieveld and Crutzen (1991) assume the temperature dependence to be the same as for a(H+)a(NO3)/p(HNO3) in Schwartz and White (1981).
102) Hs′ = 2.6×107×exp(8700 K (1/T−1/T)) mol2/(m6 Pa)
103) Hs′ = 2.4×107×exp(8700 K (1/T−1/T)) mol2/(m6 Pa)
104) Pandis and Seinfeld (1989) refer to Schwartz (1984) as the source, but it is probably from Schwartz and White (1981).
105) The value is incorrect. See erratum by Brimblecombe and Clegg (1989).

The numbers of the notes are the same as in Sander (2023). 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


* * *