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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Description of key information

The log Koc of diisobutyl phthalate is estimated by QSAR to be 3.06.

Key value for chemical safety assessment

Koc at 20 °C:
1 148

Additional information

No reliable experimentally determined log Koc is available. Therefore a log Koc has been estimated by means of a QSAR.

Calculation of the log Koc to determine the potential for adsorption/desorption of chemicals is acceptable provided that a recognised and scientifically robust method is used. The TGD includes a method for calculating a log Koc QSAR using the log Kow. This approach is considered to be acceptable with restrictions.

Based on the experimentally determined log Kow of 4.11, the log Koc is estimated by the QSAR of Sabljic and Güsten (1995) to be 3.06.

[LogKoc: 3.06]