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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Reference
Endpoint:
adsorption / desorption, other
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
See attached QPRF and QMRF
Qualifier:
no guideline available
Principles of method if other than guideline:
No guideline available, QSAR conduted according to REACH guidance on information requirements and chemical safety assessment, chapter R.6: QSARs and grouping of chemicals, May 2008.
GLP compliance:
no
Specific details on test material used for the study:
CC(CCCCCC\C=C\CCCCCCCC([O-])=O)OC1OC(CO)C(O)C(C)C1OC1CC(CO)C(O)C(O)C1O
The substance is a complex mixture of variable composition. It is therefore scientifically not justified to determine the Koc by experimental methods. Therefore, the Koc was calculated using the software EPISuite (US EPA) for each relevant sophorolipid constituent. The highest Koc obtained by calculation was taken as the representative for the substance.
Key result
Type:
log Koc
Value:
4.46
Remarks on result:
other: The Koc may vary by pH. The estimated value is applicable to the neutral pH range.

KOCWIN predicted that Sophorolipids: fermentation products of glucose and fatty acids, C18 (unsaturated), glycerol esters with yeast Starmerella bombicola, hydrolysed has a log Koc of 4.46

Validity criteria fulfilled:
not applicable
Conclusions:
The highest log Koc for the test item is 4.46, predicted for the constituents by QSAR, KOCWIN v2.00 software.
Executive summary:

The log Koc of Sophorolipids: fermentation products of glucose and fatty acids, C18 (unsaturated), glycerol esters with yeast Starmerella bombicola, hydrolysed was estimated to be 4.46 using the QSAR model KOCWIN v2.00 leading to an estimated Koc of 29000 L/kg.

Description of key information

The highest log Koc for the test item is 4.46, predicted for the constituents by QSAR, KOCWIN v2.00 software.

Key value for chemical safety assessment

Koc at 20 °C:
29 000

Additional information