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Environmental fate & pathways

Henry's Law constant

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Reference
Endpoint:
Henry's law constant
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
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
Key result
H:
0 atm m³/mol
Temp.:
20 °C
Conclusions:
Henry’s Law constant: 4.19E-8 Pa·m3/mol or 4.12E-13 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 2.42 x 10-8 Pa and water solubility of 0.23 g/L, the Henry’s Law constant for the test substance was calculated to be 4.19 x 10-8 Pa·m3/mol or 4.12 x 10-13 atm·m3/mol.

Based on this calculation, the test substance can be considered to have negligible escaping tendency from dilute aqueous solution.

Description of key information

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0
at the temperature of:
20 °C

Additional information