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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

A realistic assessment of the Koc of the UVCB cannot be made with QSAR prediction.        
- limited bioaccumulation potency;
- low volatility;
- sorb strongly to organic surfaces;
- some of the constituents could be adsorb to soil particles.

Key value for chemical safety assessment

Koc at 20 °C:
1 082

Additional information

A realistic assessment of the Koc of the UVCB cannot be made due to the following three reasons:

·        Koc wascalculated by EPI Suite KOCWIN v 2.00 based on 2 different approaches: molecular connectivityindex (MCI) and log Kow.

·        There is a significant discrepancy in both predictions.The predicted byMCIKOCcoefficients range from510 to 6740 L/kg, while the predictions based onKOWare in the range from9 to 50 L/kg.

·        Most of the predictions are out-of-domain affecting their reliability.


Koc prediction is based on constituents B andD predictions from the MCI method shown in the table below. The Koc prediction is>1000 L/kg but bear in mind that the prediction for constituent D is out-of-domain.



KOC, L/kg





In MW&Inst domain

In domain



In MW domain

Out of -CN Inst domain

Out of domain

[LogKoc: 3.03]