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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Biodegradation in soil

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Administrative data

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Description of key information

Rosin Adducts and Rosin Adducts Salts substances are UVCB substances made up of constituents with different properties, which will behave differently when released to the environment. Standard biodegradation studies are not really appropriate for whole substance UVCBs and therefore as much is reasonably practicable, biodegradation of the individual consituents as a whole needs to be considered. In order to prioritise the consituents that may require further testing a PBT screening assessment of Rosin Adducts and Rosin Adducts Salts substances was undertaken. The logic being that if a consituent is both Persistent and Bioaccumulative then further testing on these constituents would be required.


Guidance for mono-constituents is available from ECHA; however, for complex substances such as Unknown or Variable Composition, Complex reaction products or Biological materials (UVCBs) there is currently little guidance on how the PBT/vPvB assessment should be conducted. A pragmatic approach for UVCBs is to evaluate all the individual constituents present in the substance at a concentration of ≥0.1% for their PBT properties.


As this is a UVCB substance it is not possible to identify every single constituent at a concentration of 0.1% (which numbers thousands)and detailed analysis of each individual constituent within the substance is not available. As such, a list of representative constituents has been developed from information in the Substance Identity Profiles. All identified representative constituents were assessed individually for their P and B properties.


Following the Screening assessment, the data gathered suggests that whilst conclusions on Persistence cannot be drawn forthe constituents where data are from QSARs alone, none of the constituents are expected to be Bioaccumulative. Four of the constituents (Neutral Aldehydes) were predicted to potentially be B/vB but these have experimental data to show they are not P, therefore are not PBT/vPvB. It is noted that, even if the data on bioaccumulation is mostly from QSARs for this substance, the models used are reliable, well documented and well known and fit these types of constituents, even those substances that have a higher Kow than the training data set. The Predicted BCF values in both models were much lower than the 2000 L/kg criterion for B in the Regulation and therefore there is high confidence that there are no constituents of concern in this substance. As none of the constituents are both P and B then none have been identified as consituents of concern and therefore do not need to be taken forward for further simulation studies.

Key value for chemical safety assessment

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