Henry's Law Constants

Rolf Sander

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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 oxygen (O)Aldehydes (RCHO) → methanal

TRIVIAL NAME: formaldehyde
CAS RN:50-00-0

Hcp d ln Hcp / d (1/T) Reference Type Notes
[mol/(m3Pa)] [K]
3.2×101 6800 Warneck and Williams 2012 L 187)
3.2×101 7100 Sander et al. 2011 L 187)
3.2×101 7100 Sander et al. 2006 L 187)
3.2×101 6800 Staudinger and Roberts 2001 L 187)
3.2×101 6800 Staudinger and Roberts 1996 L 187)
3.5×101 5700 Liu et al. 2015 M
3.4×101 6400 Allou et al. 2011 M 187)
5.3×101 1600 Seyfioglu and Odabasi 2007 M 187)
9.9×101 Kim et al. 2000 M 31) 187)
3.1×101 6500 Zhou and Mopper 1990 M 187) 188)
3.1×101 7200 Betterton and Hoffmann 1988 M 187)
Dong and Dasgupta 1986 M 189)
Ledbury and Blair 1925 M 190)
Blair and Ledbury 1925 M 190)
3.0×101 Lide and Frederikse 1995 V 187)
2.3 Hwang et al. 1992 V 187)
6.9×101 6400 Chameides 1984 T 187)
2.9×101 7200 Bell 1966 X 187) 191)
5.9×101 Gaffney and Senum 1984 X 153) 187)
4.5×101 Lee and Zhou 1993 C 31) 187)
Hough 1991 C 190)
1.4×102 Warneck 1988 C 187)
2.8×10−2 Hilal et al. 2008 Q
1.8×10−1 Nirmalakhandan et al. 1997 Q
1.0×102 Meylan and Howard 1991 Q 187)
4.2×10−2 Abraham et al. 1990 ?
6.2×101 Seinfeld 1986 ? 7) 187)
Lelieveld and Crutzen 1991 W 190)
Pandis and Seinfeld 1989 W 190)


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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.


7) Several references are given in the list of Henry's law constants but not assigned to specific species.
31) Value at T = 295 K.
153) Value given here as quoted by Gaffney et al. (1987).
187) Effective value that takes into account the hydration of HCHO:
H= ([HCHO]+[CH2(OH)2])/p(HCHO)
188) Data from Table 1 by Zhou and Mopper (1990) were used to redo the regression analysis. The data for acetone in their Table 2 are incorrect.
189) Dong and Dasgupta (1986) found that the Henry's law constant for HCHO is not a true constant but increases with increasing concentration. They recommend the expression
[HCHO] = 10(4538/T−11.34) ×p(HCHO)(252.2/T+0.2088)
with [HCHO] = aqueous-phase concentration in [M], p(HCHO) = partial pressure in [atm], and T = temperature in [K]. Note that this expression does not converge asymptotically to a constant value at infinite dilution.
190) Ledbury and Blair (1925) (and also Blair and Ledbury (1925)) measured the solubility of HCHO at very high concentrations around 5 to 15 M. Their value of H increases with HCHO concentration. Lelieveld and Crutzen (1991), Hough (1991), and Pandis and Seinfeld (1989) all use these solubility data but do not specify how they extrapolated to lower concentrations. Since the concentration range is far from typical values in atmospheric chemistry, the value is not reproduced here.
191) Value given here as quoted by Möller and Mauersberger (1992).

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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