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Environmental fate & pathways

Henry's Law constant

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Description of key information

Potential for volatilisation from water is low

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.334
at the temperature of:
20 °C

Additional information

The Henry's law constant was calculated from the ratio between the vapour pressure and water solubility. The water solubility was observed to >200 g/L and therefore a range is given for the Henry's law constant of ≥0.067 and <0.334 Pa*m3/mol. This range indicates that volatilisation from water is relatively low. Only 2.5% will partition to air when using a Henry's law constant of

0.334 Pa*m3/mol and 0.5% when using a Henry's law constant of 0.067 Pa*m3/mol in a level 1 distribution model.