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Environmental fate & pathways

Henry's Law constant

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Henry's law constant
Type of information:
calculation (if not (Q)SAR)
Migrated phrase: estimated by calculation
Adequacy of study:
other information
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: accepted calculation method
Principles of method if other than guideline:
Calculation of the Henry's Law Constant (KH) at 20 °C according to D. Mackay, W.Y. Shiu, R.P.Sutherland, Environ. Sci. Techn. 13, 333 -337 (1979)
GLP compliance:
0 atm m³/mol
20 °C
Remarks on result:
other: actual value 2e-11

2 x 10-11 Atm x m³/Mole, 20 °C is equivalent to 2.03 x 10 -6 Pa x m3/Mole, 20 °C

[1 atm = 101.32499 kPa]

Executive summary:

The calculation of Henry's constant of KH = 2.03 x 10 -6 Pa m3 mole -1 at 20 °C, demonstrates that Diuron is extremely non-volatile

Description of key information

Diuron is extremely non-volatile.

Key value for chemical safety assessment

Additional information

The Henry Constant was calculated as 2.0E-11 Pa x m3/mole (20 °C). The substance is thus considered not to be volatile and will not evaporate into the atmosphere from the water surface.