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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

bioaccumulation in aquatic species, other
Type of information:
Adequacy of study:
supporting study
Study period:
April 2018
4 (not assignable)
Rationale for reliability incl. deficiencies:
results derived from a (Q)SAR model, with limited documentation / justification
no guideline followed
Principles of method if other than guideline:
A bioconcentration factor (BCF) was estimated in BCFWIN v2.17 in EpiSuite™. The model uses a traditional regression method based on Log Kow and the Arnot-Gobas method to provide an estimate for BCF.
GLP compliance:
Key result
other: (Q)SAR prediction
Remarks on result:
other: Log BCF = 0.500
Validity criteria fulfilled:
not applicable
A bioconcentration factor (BCF) of 3.162 (Log BCF = 0.500) was predicted in the BCFWIN v2.17 model for 2-ethylbutyric acid.

Description of key information

The BCFWIN v2.17 model in Epi Suite obtained a bioconcentration factor (BCF) prediction for 2-ethylbutyric acid of 3.162 (Log BCF = 0.500).

Key value for chemical safety assessment

BCF (aquatic species):
3.162 dimensionless

Additional information