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Environmental fate & pathways

Henry's Law constant

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Description of key information

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
1 031 000
at the temperature of:
25 °C

Additional information

The calculated value for H at 25 °C is: 1.031 MPa m3/ mol = 10.18 atm m3/ mol

As a consequence of this high value for Henry's Law constant, the substance is very volatile from water.

According to "OECD Series on Testing and Assessment / Adopted Guidance and Review Documents, No. 23: Guidance Document on Aquatic Toxicity Testing of Difficult Substances and Mixtures (2000)": "As an approximation, if H is greater than 100 Pa m3/mol, more than 50% of the substance could be lost from the water phase in 3-4 hours".