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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

PETRORISK model (version 8.01) predicted a log Koc to be between 2.26 and 11.1.


QSAR predictions of adsorption/ desorption of VHGO have also been provided to support the read-across from VHGO to registration substance.

Key value for chemical safety assessment

Additional information

Standard adsorption/desorption studies are not applicable to petroleum UVCB substances, therefore in accordance with Annex XI Section 1.3 testing is not scientifically necessary and the endpoint has been fulfilled using QSAR calculations for relevant constituents.  PETRORISK is a well documented and peer reviewed model that is widely used across the petrochemicals industry. This substance fits within the criteria of the model and there are no reservations about the validity of the model runs. It is expected that this data is reliable with restrictions.


Substance is a hydrocarbon UVCB. Standard tests for this endpoint are intended for single substances and are not appropriate for this complex substance. However, the endpoints are characterized using quantitative structure property relationships for representative hydrocarbon structures that comprise the hydrocarbon blocks used to assess the environmental risk of this substance with the PETRORISK model (version 8.01). Computer modelling is an accepted method for estimating adsorption/ desorption of chemicals


PETRORISK model (version 8.01) predicted a log Koc to be between 2.26 and 11.1 (see Product Library results in PETRORISK report attached to IUCLID Section 13).