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Environmental fate & pathways

Henry's Law constant

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Reference
Endpoint:
Henry's law constant
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Remarks:
Internationally accepted calculation method, EPI-Suite EPA (USA)
Principles of method if other than guideline:
Calculation by EPI-Suite HENRYWIN v3.20.
GLP compliance:
no

Henrys Law Constant at 25 ºC (EPI-Suite, HENRYWIN v3.20):

Bond Method : 0,387 atm·m3/mole (39200 Pa·m3/mole)

Group Method: 0.0203 atm·m3/mole (2060 Pa·m3/mole)

Exper Database: 0.0203 atm·m3/mole (2060 Pa·m3/mole)

Conclusions:
Based on an estimated Henry's Law constant of 0.02 atm·m3/mole (2060 Pa·m3/mole) (EPI-Suite, HENRYWIN v3.20), 1,1 -difluoroethane is expected to volatilize rapidly from water surfaces.
Executive summary:

The estimated Henry's Law constant using EPI-Suite, HENRYWIN v3.20 is 0.02 atm·m3/mole (2060 Pa·m3/mole). On the basis of this value, 1,1-difluoroethane is expected to volatilize rapidly from water surfaces.

Description of key information

Based on the estimated data using EPI-Suite (HENRYWIN v3.20), the estimated Henry's Law constant is 0.02 atm-m3/mole.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
2 060
at the temperature of:
25 °C

Additional information

Based on an estimated Henry's Law constant of 0.02 atm·m3/mole (2060 Pa·m3/mole) (EPI-Suite, HENRYWIN v3.20), 1,1 -difluoroethane is expected to volatilize rapidly from water surfaces.