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Environmental fate & pathways

Henry's Law constant

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Administrative data

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Reference
Endpoint:
Henry's law constant
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Study period:
02.07.2004
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Key result
H:
0.274 Pa m³/mol
Temp.:
20 °C
Atm. press.:
101.325 Pa
Remarks on result:
other: calculated to equation: H = p * MW/c (kPa m3/mol).
Conclusions:
The resulting Henry constant of the active substance is H = 2.74e-4 kPa m3/mol.

Description of key information

The volatilisation of fenpropimorph from water was determined by calculating the Henry constant according to equation:


                                               H = p . MW/c (kPa m3/mol).


 


p:         vapor pressure       (3.9 . 10-6 kPa at 20 °C; taken from section 4.6)


MW:    molecular weight   (303.5 g/mol)


c:         water solubility       (4.32 . 10-4. 104 g/m3 at 20 °C; taken from section 4.8)


 


The resulting Henry constant of the active substance is H = 2.74 . 10-4 kPa m3/mol.


 

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.274
at the temperature of:
20 °C

Additional information