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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Environmental fate & pathways

Henry's Law constant

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Description of key information

The distribution of sulfur dioxide between aqueous solutions and air can be estimated from water solubility and vapour pressure. Using a solubility of 114.5 g/l and a vapour pressure of 3271 hPa (20°C), a Henry’s law constant of 183 Pa.m3/mol can be calculated. This value indicates a rapid volatilization from aqueous solution according to the criteria of Thomas (1982).

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