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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


Calculated BCF is: 5.2 L/kg wet weight (anhydride)
Calculated BAF is: 4.73 L/kg wet weight (anhydride)

HHPAc (acid degradation product)
Calculated BCF is: 3.16 L/kg wet weight (acid)
Calculated BAF is: 0.89 L/kg wet weight (acid)
Experimental BCF is: <2.0 L/kg wet weight (acid)

Key value for chemical safety assessment

BCF (aquatic species):
2 L/kg ww

Additional information

The log Pow of 1.59 (anhydride) and -4.14 at pH= 8 (acid degradation product) does not indicate that the substance may bioaccumulate.

The BCF of the substance has been estimated using accepted calculation methods (BCFBAF v.3.01) to give a value of 5.2 L/kg ww.

As the substance is rapidly hydrolysed to the corresponding dicarboxylic acid, calculation of the BCF of the hydrolysis product has also been undertaken. The potential of bioaccumulation of the di-carboxylic acid degradation product is low, calculated to be 3.16 L/kg ww. These estimations are supported by experimental data on cyclohexanedicarboxylic acid which determined BCF values of < 2.0.

It is therefore concluded the potential for bioaccumulation of the substance is low.