Registration Dossier
Registration Dossier
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EC number: 603-923-2 | CAS number: 135590-91-9
Henry's Law constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- Henry's law constant
- Type of information:
- (Q)SAR
- Adequacy of study:
- key study
- Study period:
- 06 May 1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Calculation of the Henry's Law Constant (KH) at 20 °C
- GLP compliance:
- no
- H:
- 0 atm m³/mol
- Temp.:
- 20 °C
Reference
Henrys law constant at 20 °C = 1.16E-9 atm m³/mole
Henrys law constant at 25 °C = 2.58E-9 atm m³/mole
Description of key information
Mefenpyr-diethyl is not volatile and will not evaporate from the water surface.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 0
- at the temperature of:
- 25 °C
Additional information
Two calculations of the Henry's Law Constant are available. The Henry's Law Constant at 20°C calculated for evaporation from bidistilled water is 1.18E-04 Pa*m³/mol (acidic solution (pH 1): 1.38E-04 Pa*m³/mol, 2002). A second available calculation a Henry's Law Constant at 20°C of 2.58E-9 Pa*m³/mole (25 °C) was calculated (1991). An evaporation of the substance from the water surface to the atmosphere is not expected.
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