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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

In accordance with column 2 of REACH Annex IX, an investigation of the potential for bioaccumulation in aquatic and/or sediment-dwelling species does not need to be conducted as the logKow of biphenyl-4,4'-diol is below the relevant trigger value. 

Key value for chemical safety assessment

Additional information

An investigation of the potential for bioaccumulation in aquatic and/or sediment-dwelling species does not need to be conducted as the logKow of biphenyl-4,4'-diol is 2.7, below the trigger value of 3.0.

Moreover, measured Koc in soil and sewage works sludge ranged from 79 to 200 L/kg. It may be inferred that biphenyl-4,4-diol has a negligible tendency to partition to sediment and that significant exposure of sediment-dwelling organisms is unlikely to occur.