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PBT assessment

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PBT assessment: overall result

PBT status:
further information relevant for the PBT assessment is necessary
Justification:

The substance is a UVCB and comprises three main groups of constituents: (1) alkylation products of phenol with 2-phenylpropene resulting in 1-methyl-1-phenylethyl (cumyl)-mono- and di-substituted phenols, (2) dimers of oligomerisation products of 2-phenylpropene and (3) trimers of oligomerisation products of 2-phenylpropene. Due to the more polar and different chemical structure of the substituted phenols, environmental fate and behaviour of the three groups of constituents can be different.


 


(1) Alkylation products of phenol with 2-phenylpropene resulting in 1-methyl-1-phenylethyl (cumyl) substituted phenols are not bioaccumulative, and so are not considered PBT or vPvB.


 


(2) Dimers of oligomerisation products of 2-phenylpropene contain one of three constituents that can be considered vP, based on the OECD 309 study performed, but in total are not considered vB, hence are not vPvB. There is no data on T for the dimer tested for biodegradation, 1,1,3-trimethyl-3-phenylindane,and therefore a PBT conclusion cannot be reached. 


 


(3) Trimers of oligomerisation products of 2-phenylpropene have no data on biodegradation, but can be considered vB. There is no data on T for the trimer fraction. A conclusion on the PBT status of the trimer fraction cannot be reached.  

































 Fraction of OAPP Persistence Bioaccumulation Toxicity  Conclusion

 Alkylation products of phenol with 2-phenylpropene



No data on P



 Not B or vB



 ED concerns


 (i): The substance does not fulfil the PBT and vPvB criteria

 Dimers of oligomerisation products of 2-phenylpropene



vP



 B



No data on T


 (iii): The available information does not allow to conclude on whether the substance meets the PBT or vPvB criteria. Substance is P and B - need data on T

 Trimers of oligomerisation products of 2-phenylpropene



No data on P



 vB



No data on T


 (iii): The available information does not allow to conclude on whether the substance meets the PBT or vPvB criteria. Substance is vB - need data on P and T