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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
adsorption / desorption
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data estimated by KOCWIN v2.00 which uses a valid calculation method; the test substance was found to fall in the applicability domain of this method and results were adequate for the purpose of classification and labelling and/or risk assessment.

Data source

Reference
Reference Type:
other: Software
Title:
KOCWIN v2.00 (EPIWEB v.4.1)
Author:
U.S. Environmental Protection Agency
Year:
2012
Bibliographic source:
US EPA. Estimation Programs Interface Suite™ for Microsoft® Windows, v 4.10. United States Environmental Protection Agency, Washington, DC, USA.

Materials and methods

Test guideline
Guideline:
other: REACH guidance on QSARs: Chapter R.6. QSARs and grouping of chemicals
Principles of method if other than guideline:
The soil adsorption coefficient (log Koc) was calculated using KOCWIN v.2.00 program of EPIWEB v.4.1.

Test material

Constituent 1
Reference substance name:
C18:0 triglyceride
IUPAC Name:
C18:0 triglyceride
Constituent 2
Reference substance name:
adduct formed by two C18:3 triglycerides
IUPAC Name:
adduct formed by two C18:3 triglycerides

Results and discussion

Any other information on results incl. tables

The estimated soil adsorption coefficients (log Koc) of C18:0 triglyceride and the adduct formed by two C18:3 triglycerides using KOCWIN v.2.00 (EPIWEB v.4.1) were found to be ca. 14 and 25, respectively.

Applicant's summary and conclusion

Conclusions:
The estimated soil adsorption coefficients (log Koc) of C18:0 triglyceride and the adduct formed by two C18:3 triglycerides using KOCWIN v.2.00 (EPIWEB v.4.1) were found to be ca. 14 and 25, respectively.
Executive summary:

The soil adsorption coefficient (log Koc) of castor oil, dehydrated was estimated by the KOCWIN v.2.00 model of EPIWEB v.4.1 (as shown in the table below) considering the potentially lowest and highest adsorbing components present in the substance, i.e. a C18:0 triglyceride and an adduct formed by two C18:3 triglycerides. The log Koc was found to range between ca. 14 and 25, suggesting that castor oil, dehydrated would tend to strongly bind to soil and sediment.

Overview of estimated soil adsorption values

 Method  Results  Remarks  Reference
Castor oil, dehydrated          
Study type: adsorption (soil/sewage sludge) Modelled using Kow estimation method of KOCWIN v2.00 (EPIWEB v.4.1) Kow method:- Koc: 1.086E+14 to 7.254E+24 L/kg - Log Koc: 14.036 to 24.861 (considering the potentially lowest and highest adsorbing components) key study estimated by calculation U.S. EPA, 2012