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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The QSAR determination of the carbon partition coefficient for PDI using the model KOCWIN included in the Estimation Program Interface (EPI) Suite v4.11 revealed values of 220.3 L/kg (logKow method) and 2644 L/kg (MCI method) for the unaffected molecule of PDI as any decomposition (e.g. hydrolysis) of PDI is not taken into account by the program (Allmendinger, 2016). 

Key value for chemical safety assessment

Koc at 20 °C:
2 644

Additional information

The calculated value is only of theoretical interest as the substance hydrolyses quickly with a half-life of <5 minutes at 20°C.

[LogKoc: 3.4222]