Henry's Law Constants

Rolf Sander

Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany

Errata

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 Please do not cite the old paper anymore.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 Constants → Inorganic species → Iodine (I) → diiodine dioxide

FORMULA:	I₂O₂
CAS RN:	215239-62-6
STRUCTURE (FROM NIST):
InChIKey:	IELAHHPSAVYAOC-UHFFFAOYSA-N

$H_{s}^{cp}$	$d ln H_{s}^{cp} / d (1/ T)$	References	Type	Notes
[mol/(m³Pa)]	[K]
∞		Badia et al. (2019)	E	162) 163)
∞		Vogt et al. (1999)	E	99) 162)
9.9×10¹		Saiz-Lopez et al. (2014)	?	161) 162)

Data

The first column contains Henry's law solubility constant

H_{s}^{cp}

at the reference temperature of 298.15 K.
The second column contains the temperature dependence

d ln H_{s}^{cp} / d
(1/ T)

, also at the reference temperature.

References

Badia, A., Reeves, C. E., Baker, A. R., Saiz-Lopez, A., Volkamer, R., Koenig, T. K., Apel, E. C., Hornbrook, R. S., Carpenter, L. J., Andrews, S. J., Sherwen, T., & von Glasow, R.: Importance of reactive halogens in the tropical marine atmosphere: a regional modelling study using WRF-Chem, Atmos. Chem. Phys., 19, 3161–3189, doi:10.5194/ACP-19-3161-2019 (2019).
Saiz-Lopez, A., Fernandez, R. P., Ordóñez, C., Kinnison, D. E., Gómez Martín, J. C., Lamarque, J.-F., & Tilmes, S.: Iodine chemistry in the troposphere and its effect on ozone, Atmos. Chem. Phys., 14, 13 119–13 143, doi:10.5194/ACP-14-13119-2014 (2014).
Vogt, R., Sander, R., von Glasow, R., & Crutzen, P. J.: Iodine chemistry and its role in halogen activation and ozone loss in the marine boundary layer: A model study, J. Atmos. Chem., 32, 375–395, doi:10.1023/A:1006179901037 (1999).

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 (2023) for further details.

Notes

99)	Fast, irreversible hydrolysis is assumed, which is equivalent to an infinite effective Henry's law constant.
161)	Saiz-Lopez et al. (2014) refer to Saiz-Lopez et al. (2008) as the source, but the quoted value cannot be found there.
162)	It is unclear to which isomer the value of the Henry's law constant refers to.
163)	Assumed to be infinity by analogy with INO₃.

The numbers of the notes are the same as in Sander (2023). References cited in the notes can be found here.

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