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 ConstantsOrganic species with nitrogen (N)Nitriles (C, H, N) → hydrogen cyanide

TRIVIAL NAME: hydrocyanic acid
CAS RN:74-90-8

Hscp d ln Hs cp / d (1/T) Reference Type Notes
[mol/(m3Pa)] [K]
1.7×10−1 4400 Yoo et al. (1986) L
1.1×10−1 5000 Edwards et al. (1978) L
7.5×10−2 Riveros et al. (1998) M 9)
1.2×10−1 Fredenhagen and Wellmann (1932b) M
9.2×10−2 Hine and Weimar (1965) R
7.4×10−2 Gaffney and Senum (1984) X 153) 205)
3.9×10−2 Hilal et al. (2008) Q
1.1×10−1 Yaws (1999) ?


  • Edwards, T. J., Maurer, G., Newman, J., & Prausnitz, J. M.: Vapor-liquid equilibria in multicomponent aqueous solutions of volatile weak electrolytes, AIChE J., 24, 966–976, doi:10.1002/AIC.690240605 (1978).
  • Fredenhagen, K. & Wellmann, M.: Verteilungszahlen des Cyanwasserstoffs und des Wassers über dem Zweistoffsystem [H2O-HCN] bei 18 C, Z. Phys. Chem., 162A, 467–470, doi:10.1515/ZPCH-1932-16236 (1932b).
  • Gaffney, J. S. & Senum, G. I.: Peroxides, peracids, aldehydes, and PANs and their links to natural and anthropogenic organic sources, in: Gas-Liquid Chemistry of Natural Waters, edited by Newman, L., pp. 5–1–5–7, NTIS TIC-4500, UC-11, BNL 51757 Brookhaven National Laboratory (1984).
  • Hilal, S. H., Ayyampalayam, S. N., & 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).
  • Hine, J. & Weimar, Jr., R. D.: Carbon basicity, J. Am. Chem. Soc., 87, 3387–3396, doi:10.1021/JA01093A018 (1965).
  • Riveros, P. A., Koren, D., McNamara, V. M., & Binvignat, J.: Cyanide recovery from a gold mill barren solution containing high levels of copper, CIM Bull., 91, 73–81 (1998).
  • Yaws, C. L., ed.: Chemical Properties Handbook, McGraw-Hill, Inc. (1999).
  • Yoo, K.-P., Lee, S. Y., & Lee, W. H.: Ionization and Henry’s law constants for volatile, weak electrolyte water pollutants, Korean J. Chem. Eng., 3, 67–72, doi:10.1007/BF02697525 (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 (2015) for further details.


9) Value at T = 293 K.
153) Value given here as quoted by Gaffney et al. (1987).
205) Value at pH = 4.

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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