Henry's Law Constants

Rolf Sander

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) → hydrogen chloride

CAS RN:7647-01-0

Hscp d ln Hs cp / d (1/T) Reference Type Notes
[mol/(m3Pa)] [K]
Clegg and Brimblecombe (1986) L 50)
1.5×101 Chen et al. (1979) R
Carslaw et al. (1995) T 51)
Brimblecombe and Clegg (1989) T 52)
1.1×10−2 2300 Marsh and McElroy (1985) T
Wagman et al. (1982) T 53)
2.0×10−1 Graedel and Goldberg (1983) C
Seinfeld and Pandis (1998) ? 35)
1.9×10−1 600 Dean (1992) ? 6)
2.5×101 Seinfeld (1986) ? 7)
7.2 2000 Pandis and Seinfeld (1989) W 54)
Brimblecombe and Clegg (1988) W 43)


  • 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).
  • Carslaw, K. S., Clegg, S. L., & Brimblecombe, P.: A thermodynamic model of the system HCl-HNO3-H2SO4-H2O, including solubilities of HBr, from <200 to 328 K, J. Phys. Chem., 99, 11 557–11 574, doi:10.1021/J100029A039 (1995).
  • Chen, C.-C., Britt, H. I., Boston, J. F., & Evans, L. B.: Extension and application of the Pitzer equation for vapor-liquid equlibrium of aqueous electrolyte systems with molecular solutes, AIChE J., 25, 820–831, doi:10.1002/AIC.690250510 (1979).
  • Clegg, S. L. & Brimblecombe, P.: The dissociation constant and Henry’s law constant of HCl in aqueous solution, Atmos. Environ., 20, 2483–2485, doi:10.1016/0004-6981(86)90079-X (1986).
  • Dean, J. A.: Lange’s Handbook of Chemistry, McGraw-Hill, Inc. (1992).
  • Graedel, T. E. & Goldberg, K. I.: Kinetic studies of raindrop chemistry 1. Inorganic and organic processes, J. Geophys. Res., 88C, 10 865–10 882, doi:10.1029/JC088IC15P10865 (1983).
  • Marsh, A. R. W. & McElroy, W. J.: The dissociation constant and Henry’s law constant of HCl in aqueous solution, Atmos. Environ., 19, 1075–1080, doi:10.1016/0004-6981(85)90192-1 (1985).
  • Pandis, S. N. & Seinfeld, J. H.: Sensitivity analysis of a chemical mechanism for aqueous-phase atmospheric chemistry, J. Geophys. Res., 94D, 1105–1126, doi:10.1029/JD094ID01P01105 (1989).
  • Seinfeld, J. H.: Atmospheric Chemistry and Physics of Air Pollution, Wiley-Interscience Publication, NY (1986).
  • Seinfeld, J. H. & Pandis, S. N.: Atmospheric Chemistry and Physics, John Wiley & Sons, Inc. (1998).
  • 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.


6) Only the tabulated data between T = 273 K and T = 303 K from Dean (1992) were used to derive Hs 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.
35) Seinfeld and Pandis (1998) probably refer to the incorrect value given by Pandis and Seinfeld (1989).
43) The value is incorrect. See erratum (Brimblecombe and Clegg, 1989).
50) Hs′ = 2.0×107 (mol2)/(m6 Pa)
51) Hs′ = 2.0×107×exp(9000 K ((1)/(T)−(1)/(T))) (mol2)/(m6 Pa)
52) Hs′ = 2.0×107×exp(9000 K ((1)/(T)−(1)/(T))) (mol2)/(m6 Pa)
53) Hs′ = 2.0×107×exp(9000 K ((1)/(T)−(1)/(T))) (mol2)/(m6 Pa)
54) Pandis and Seinfeld (1989) refer to Marsh and McElroy (1985) as the source but the quoted value cannot be found there.

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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