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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

A range of 3.162 to 56.23 L/kg wet-wt for the BCF was obtained using the EPISuite modelling tool.  A literature reference reported a value of BCF=2 L/kg wet-wt based on one C-13 component of a naphthenic acid mixture.  The Japanese METI-NITI database reports a range of BCF between 1.6 and 27 L/kg wet-wt for sodium naphthenate.

Key value for chemical safety assessment

Additional information

The BCF of a commercial naphthenic acids was measured in rainbow trout by Young et al. (2008). The BCF of 2 L/kg wet-wt based, was measured for one C-13 component of the naphthenic acids. The Japanese METI-NITI database reports a measured range of BCF values between 1.6 and 27 (wet-wt based) for sodium naphthenate, with one, two and three cycles. The available data suggest low or no bioaccumulation potential. For further details see IUCLID endpoint 5.3.1..

Value to be used for CSA:low or no bioaccumulation potential, BCF ≤ 27 (wet-wt based)