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EC number: 266-040-8
CAS number: 65997-04-8
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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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