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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The organic carbon partition coefficient (Koc) for 1,8-naphthylenediamine was predicted using the QSAR calculation of the Estimation Program Interface (EPI) Suite v 4.11. The Koc was estimated to be 35.03 L /kg (logKow method), and 4.14 x 10E3 L/kg (MCI method). The results relate to the unaffected molecule of the substance as any decomposition (e.g. hydrolysis) of the substance is not taken into account by the program.

Based on structural properties of 1,8 -naphthylenediamine, the predicted vale for log Koc = 3.62 using MCI method is more likely than the predicted value using log Kow method. It is assumed that the amino groups of 1,8-naphthylenediamine cause ionic interactions with soil components that seem to be predicted more reliable by MCI method.

Key value for chemical safety assessment

Koc at 20 °C:
4 140

Additional information

[LogKoc: 3.62]