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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Description of key information

The Henry's Law Constant (HLC) of 3,3,3-trifluoro-2-(trifluoromethyl)propene is calculated to be 80500 Pa m3/mol (25°C).

The values indicates that 3,3,3-trifluoro-2-(trifluoromethyl)propene in a system water/air has a high tendency to distribute to the gas phase.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
80 500
at the temperature of:
25 °C

Additional information

The Henry's Law Constant (HLC) of 3,3,3-trifluoro-2-(trifluoromethyl)propene at 25°C is calculated to be 8.05E+04 Pa m³/mol (Ref: EUSES 2.1.2.).

(Input Parameter: Vapour Pressure at the Boiling Point (14°C) = 101325 Pa)


As reported in Guidance on Information Requirements and Chemical Safety Assessment_Chapter R.7a, substances with HLC values around 100 Pa·m3/mol, will have a rapid volatilisationfrom water.

Basing on the physical state of the substance and the calculated Henry’s Law constant value, 3,3,3-trifluoro-2-(trifluoromethyl)propene is expected to have a low affinity for distributing in the water compartment.