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Henry's Law Constants

www.henrys-law.org

Rolf Sander

Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany

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Henry's Law Constants

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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 Constants → Organic species with oxygen (O) → Carboxylic acids (RCOOH) and peroxy carboxylic acids (RCOOOH) → 2-methylpropanoic acid

FORMULA:(CH3)2CHCOOH
TRIVIAL NAME: isobutyric acid
CAS RN:79-31-2
STRUCTURE
(FROM NIST):
InChIKey:KQNPFQTWMSNSAP-UHFFFAOYSA-N

Hscp d ln Hs cp / d (1/T) Reference Type Notes
[mol/(m3Pa)] [K]
9.6 von Hartungen et al. (2004) M
1.1×101 Khan et al. (1995) M
1.1×101 Khan and Brimblecombe (1992) M
5.6×101 Servant et al. (1991) M 201)
1.4 Mackay et al. (2006c) V
2.5×101 Hilal et al. (2008) Q

References

  • 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).
  • Khan, I. & Brimblecombe, P.: Henry’s law constants of low molecular weight (<130) organic acids, J. Aerosol Sci., 23, S897–S900, doi:10.1016/0021-8502(92)90556-B (1992).
  • Khan, I., Brimblecombe, P., & Clegg, S. L.: Solubilities of pyruvic acid and the lower (C1-C6) carboxylic acids. Experimental determination of equilibrium vapour pressures above pure aqueous and salt solutions, J. Atmos. Chem., 22, 285–302, doi:10.1007/BF00696639 (1995).
  • Mackay, D., Shiu, W. Y., Ma, K. C., & Lee, S. C.: Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals, vol. III of Oxygen Containing Compounds, CRC/Taylor & Francis Group (2006c).
  • Servant, J., Kouadio, G., Cros, B., & Delmas, R.: Carboxylic monoacids in the air of Mayombe forest (Congo): Role of the forest as a source or sink, J. Atmos. Chem., 12, 367–380, doi:10.1007/BF00114774 (1991).
  • von Hartungen, E., Wisthaler, A., Mikoviny, T., Jaksch, D., Boscaini, E., Dunphy, P. J., & Märk, T. D.: Proton-transfer-reaction mass spectrometry (PTR-MS) of carboxylic acids. Determination of Henry’s law constants and axillary odour investigations, Int. J. Mass Spectrom., 239, 243–248, doi:10.1016/J.IJMS.2004.09.009 (2004).

Type

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.

Notes

201) The value given here was measured at a liquid phase mixing ratio of 1 μmol/mol. Servant et al. (1991) found that the Henry's law constant changes at higher concentrations.

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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