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Environmental fate & pathways

Henry's Law constant

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Reference
Endpoint:
Henry's law constant
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
QSAR prediction
Principles of method if other than guideline:
Calculation based on HENRYWIN (v3.20), Estimation Programs Interface Suite™ for Microsoft® Windows v 4.10. US EPA, United States Environmental Protection Agency, Washington, DC, USA.
GLP compliance:
no
H:
148 000 Pa m³/mol
Temp.:
25 °C
Remarks on result:
other: HENRYWIN (v3.20) Program Results

For detailed description on the model and its applicability, see "Any other information on materials and methods incl. tables".

Description of key information

The Henry’s Law Constant is 148000 Pa m³/mol. Considering its vapour pressure, volatility, solubility and resultant Henry’s Law Constant, 2,3,3,3-Tetrafluoropropene is expected, under equilibrium conditions, to exist principally in the air.

Key value for chemical safety assessment

Additional information

The calculated Henry’s Law Constant for 2,3,3,3-Tetrafluoropropene is 148000 Pa m³/mol (25 °C) (EPI Suite v4.11, HENRYWIN v3.20). Due to the high Henry’s Law Constant the substance will evaporate rapidly from the water surface to the atmosphere.