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Environmental fate & pathways

Adsorption / desorption

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Description of key information

A log Koc of 2.15 (141 l/kg) can be taken as representative for tetrachloroethylene.

Key value for chemical safety assessment

Koc at 20 °C:
141

Additional information

The available measured values for the Koc range from 40.7 to 525. Rather than to try to derive a single value from the available data or select one of these values as the key parameter, the Koc value calculated from the octanol-water partitioning coefficient (log Kow = 2.53) using the equation from the TGD (hydrophobics). This results in a Koc value of 141 l/kg (log value is 2.15), which is taken as the key parameter.