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Environmental fate & pathways

Henry's Law constant

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Description of key information

From the water surface, the substance will slowly evaporate into the atmosphere.

Key value for chemical safety assessment

Additional information

The Henry's Law Constant has been calculated according to the following formula:

HLC = Pv / S

Input parameters:

Pv (vapour pressure) = 270 - 340 Pa

S (solubility in water) = 31 - 128 mg/L = 0.0997 - 0.412 mol = 99.7 - 412 mol/m3

As the test substance is a complex mixture of components which strongly differ in their chemical composition, the phys-chem parameters (e.g. vapour pressure, water solubility) are given as range. With regard to the widely ranging input parameters, the calculation of the Henry's Law Constant has been performed with all possible variations of the lower and upper end of vapour pressure and water solubility, respectively.

The calculated results of Henry's Law Constant are likewise given as range: 0.65 - 3.41 Pa*m3/mol