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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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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 naphthalene-1,5-diol using the model KOCWIN included in the Estimation Program Interface (EPI) Suite v4.1 revealed values of 184.3 L/kg (logKow method) and 2653 L/kg (MCI method) for the unaffected molecule of the substance as any decomposition (e.g. hydrolysis) of the substance is not taken into account by the program.

Key value for chemical safety assessment

Koc at 20 °C:

Additional information

The organic carbon partition coefficient log Koc of naphthalene-1,5-diol was estimated using the Estimation Program Interface EPI-Suite version 4.1 (KOCWIN) and calculated as:

a)MCI method: Log Koc = 3.4237, Koc = 2653 L/kg

b)Log Kow method: Log Koc = 2.2655, Koc = 184.3 L/kg

Calculation is based on experimentally determined Log Kow of 1.82 (Hansch & Leo, 1995) which was entered in the KOCWIN interface.