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PBT assessment

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PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB

For (1-methylethyl)-1,1'-biphenyl (isopropylbiphenyl, MIPB), PBT properties according to Annex XIII of Regulation (EU) 1907/2006 (REACH) were evaluated examining the substance itself. Assessment was carried out based on ECHA document "Guidance on information requirements and chemical safety assessment, Chapter R.11: PBT Assessment".

(1-Methylethyl)-1,1'-biphenyl consists of two isomers 3- (meta, m-) and 4- (para, p-)isopropylbiphenyl. Properties and behaviour in the environment of the two isomers are so similar, that these constituents of isopropybiphenyl are assessed together as the substance (1-methylethyl)-1,1'-biphenyl (mixture of isomers) itself.

For (1-methylethyl)-1,1'-biphenyl, criteria for P, and T properties proved to be not fulfilled. With respect to its bioaccumulation potential (BCF of 2896), the B- criterion was fulfilled but not the vB criterion. Overall, the substance (1-methylethyl)-1,1'-biphenyl (mixture of isomers) was identified not to be a PBT substance.