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Environmental fate & pathways

Adsorption / desorption

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Reference
Endpoint:
adsorption / desorption: screening
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance and its relevant degradation products decompose rapidly
Executive summary:

For PNEC derivation according to the equilibrium partitioning method, a Koc value is required. As it was not mandatory to have a log Koc value measured experimentally (the substance and its degradation products decompose rapidly), a value was estimated from the available log Kow value using the following equation from TGD Part III (for nonhydrophobic substances): log Koc = 0.52 x log Kow + 1.02 = 2.292 and Koc = 195.884.

Description of key information

For PNEC derivation according to the equilibrium partitioning method, a Koc value is required. As it was not mandatory to have a log Koc value measured experimentally (the substance and its degradation products decompose rapidly), a value was estimated from the available log Kow value using the following equation from TGD Part III (for nonhydrophobic substances): log Koc = 0.52 x log Kow + 1.02 = 2.292 and Koc = 195.884.

Key value for chemical safety assessment

Koc at 20 °C:
195.884

Additional information

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