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EC number: 219-094-1 | CAS number: 2356-53-8
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
The Henry's Law Constant (HLC) of 1,2-dichloro-1,1,2-trifluoro-2-(trifluoromethoxy)ethane is calculated to be 88177 Pa·m3/mol.
Basing on such value 1,2-dichloro-1,1,2-trifluoro-2-(trifluoromethoxy)ethane is anticipated to have rapid volatilization from water.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 88 177
- at the temperature of:
- 20 °C
Additional information
The Henry's Law Constant (HLC) of 1,2-dichloro-1,1,2-trifluoro-2-(trifluoromethoxy)ethane is calculated according to the following equation:
Henry's Law Constant (HLC) = (VP x MOLW) / WS
(Reference: Guidance on Information Requirements and Chemical Safety Assessment_ Chapter R.16:
Environmental Exposure Estimation_ Version 3_Equation R.16-4)
where:
VP = Vapour pressure (Pa) = 46135 Pa (at 20°C)
MOLW = Molecular Weight (g/mol) = 237g/mol
WS = Water solubility (mg/L) = 124 mg/L (at 20°C)
As reported in Guidance on Information Requirements and Chemical Safety Assessment_Chapter R.7a_v.6., substances with HLC values around 100 Pa·m3/mol, will have a rapid volatilization from water.
Basing on the calculated Henry’s Law constant value, volatilization of 1,2-dichloro-1,1,2-trifluoro-2-(trifluoromethoxy)ethane from water is expected to be very rapid.
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