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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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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Henry's law constant
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Principles of method if other than guideline:
TNT: determination of vapour pressure using effusion method with Knudsen cell.
GLP compliance:
yes (incl. QA statement)
Key result
ca. 0.01 Pa m³/mol
20 °C
Atm. press.:
760 mm Hg

Description of key information

Henry's law constant: ca. 0.01 Pa m³/mol at 20°C.

Key value for chemical safety assessment

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

Additional information