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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Equation shown to be valid for chlorinated paraffins
Justification for type of information:
QSAR prediction
Principles of method if other than guideline:
Calculation of Koc value from QSAR equation
GLP compliance:
not specified
Type of method:
other: QSAR determination
other: QSAR determination
Test temperature:
Not applicable
Details on study design: HPLC method:
Not applicable
Details on sampling:
Not applicable
Details on matrix:
Not applicable
Details on test conditions:
Not applicable
Computational methods:
Not applicable
Sample No.:
log Koc
>= 4.47 - <= 4.96 dimensionless
Remarks on result:
other: QSAR determination
Details on results (HPLC method):
Not applicable
Adsorption and desorption constants:
Not applicable
Recovery of test material:
Not applicable
Concentration of test substance at end of adsorption equilibration period:
Not applicable
Concentration of test substance at end of desorption equilibration period:
Not applicable
Details on results (Batch equilibrium method):
Not applicable
Not applicable
Validity criteria fulfilled:
not applicable
The log Koc was calculated to be 4.47- 4.96.
Executive summary:

Using the QSAR equation for predominantly hydrophobic chemicals given in the EU Technical Guidance Document (log Koc=0.81 log Kow + 0.10), and a log Kow value of 5.4- 6.0 the Koc value for Fatty acids, C16-C18(even numbered) methyl esters, chlorinated can be estimated as 4.47- 4.96.

Description of key information

The log Koc was calculated to be 4.47- 4.96.

Key value for chemical safety assessment

Koc at 20 °C:
91 201

Additional information