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EC number: 240-815-0 | CAS number: 16752-77-5
Henry's Law constant
Administrative data
Link to relevant study record(s)
- 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
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The Henry’s Law constant is calculated as H = P/S where P (vapor pressure) is expressed in units of Pascals or atmospheres and S (water solubility) is expressed in units of mol/m³.
- GLP compliance:
- no
- Specific details on test material used for the study:
- Methomyl (DPX-X1179)
Purity: Not reported - Key result
- H:
- 0 Pa m³/mol
- Temp.:
- 20 °C
- H:
- 0 atm m³/mol
- Temp.:
- 20 °C
- Conclusions:
- The constant for the test substance is 1.50E-6 Pa · m³/mol (1.48E-11 atm · m³/mol).
- Executive summary:
The Henry’s Law constant, H = P/S where P (vapor pressure) is expressed in units of Pascals or atmospheres and S (water solubility) is expressed in units of mol/m³, was calculated for the test substance. Based on the experimentally determined vapor pressure of 4.75E-4 Pascals or 4.68E-9 atmospheres and water solubility of 51.25 g/L, the Henry’s Law constant for the test substance was calculated to be 1.50E-6 Pa · m³/mol or 1.48E-11 atm · m³/mol.
Based on this calculation, the test substance can be considered to have negligible escaping tendency from dilute aqueous solution.
Reference
Description of key information
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 0
Additional information
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