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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

Two different QSAR approaches were used to estimate the bioconcentration factor (BCF) for 44PD (CAS nr 101-96-2). The results of both studies are very similar, with the QSAR based on the Kow value a log BCF of 1.978 was estimated and with the QSAR based on a mechanistic approach, describing uptake and elimination processes, a log BCF of 2.10 was estimated.

Key value for chemical safety assessment

BCF (aquatic species):
125.9 L/kg ww

Additional information

Two different QSAR approaches were used to estimate the bioconcentration factor (BCF) for 44PD (CAS nr 101-96-2). The results of both studies are very similar, with the QSAR based on the Kow value a log BCF of 1.978 was estimated and with the QSAR based on a mechanistic approach, describing uptake and elimination processes, a log BCF of 2.10 was estimated.

As the mechanistic approach is somewhat more reliable (the prediction rate of this QSAR is somewhat better) the result of this study was preferred and chosen as being representative. Therefore the log BCF is estimated to be 2.10, or BCF = 125.9 L/kg ww.