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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

adsorption / desorption, 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:
PCKOCWIN v1.66 (or KOCWIN) is a model in Epi Suite™ that uses a traditional method based on Log Kow and the Sabljic molecular connectivity method to predict the soil adsorption coefficient (Koc) of organic substances in soil and sediment.
GLP compliance:
Key result
7.074 dimensionless
Key result
log Koc
0.85 dimensionless
Validity criteria fulfilled:
not applicable
The soil adsorption coefficient of 2-ethylbutyric acid was predicted to be Koc = 7.074 (Log Koc = 0.850) by KOCWIN v1.66 in Epi Suite™.

Description of key information

A Koc of 7.074 (Log Koc = 0.850) was predicted for the soil adsorption coefficient of 2-ethylbutyric acid by KOCWIN v1.66 (Epi Suite™).

Key value for chemical safety assessment

Koc at 20 °C:

Additional information