Registration Dossier

Administrative data

Endpoint:
toxicity to terrestrial arthropods: long-term
Type of information:
(Q)SAR
Adequacy of study:
key study
Study period:
2014
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The estimation for toxicity to terrestrial arthropods was performed with QSAR software v3.2.0. This tool is recommended by ECHA
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2014
Report Date:
2014

Materials and methods

Test guideline
Qualifier:
no guideline required
Guideline:
other: QSAR Toolbox prediction based on read-across
Deviations:
not applicable
GLP compliance:
no
Application method:
other: QSAR Toolbox prediction based on read-across

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:
- Molecular weight (if other than submission substance): 384.22
- Smiles notation (if other than submission substance): CCCCOC(=O)C1CCC(SC2CCC(C(=O)OCCCC)CC2)CC1
- Physical state: liquid

Sampling and analysis

Analytical monitoring:
no

Test substrate

Vehicle:
no

Test organisms

Test organisms (species):
other: QSAR Toolbox prediction based on read-across
Animal group:
other: QSAR Toolbox prediction based on read-across

Study design

Study type:
other: QSAR Toolbox prediction based on read-across

Results and discussion

Effect concentrations
Dose descriptor:
NOEC
Effect conc.:
826 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Remarks on result:
other: 483-1170 mg/kg soil dw

Any other information on results incl. tables

Toxicity of the target chemical (826 mg/kg soil dw) is predicted from category members using read-across based on 4 values within the range 555 - 1.00E+03 mg/kg soil dw from 4 nearest neighbours compared by prediction descriptors. Category members are single chemicals or mixtures and are selected based on the profile of the target chemical. Only chemicals having experimental data are listed in the category (CAS59447-55-, CAS31778-10-6, CAS125643-61-0 and CAS2144-53-8).The 4 category members are reported in more detail in the attached QSAR report.

 

Category definition and category members

Category hypothesis:All substances selected for read across belong to the US EPA Esters chronic Tox category

 

Applicability domain of the category:

The applicability domain is defined by following scheme:

1) Referential boundary: The target chemical should be classified as Esters (Chronic toxicity) by US-EPA New Chemical Categories

2) Parametric boundary: The target chemical should have a value of log Kow which is >= 6.32

3) Parametric boundary: The target chemical should have a value of log Kow which is <= 7.93

 

Endpoints covered:long term NOEC to earthworm Eisenia fetida

 

Prediction

Defined Endpoint (OECD Principle 1):

 Endpoint:NOEC

 Dependent variable:NOEC

 Units:mg/kg soil dw

 Species:Eisenia fetida

 

Unambiguous algorithm (OECD Principle 2):

Prediction approach:Read-across from category members. Experimental values for the target chemical (if any) were not used in prediction calculations

Calculation approach:Takes average value from the 5 nearest neighbours

Input for prediction (target chemical):SMILES

Descriptor and endpoint values for target chemical: log Kow = 7.34

Predicted value (model result):826 mg/kg soil dw

 

Applicability domain (OECD Principle 3):

The target chemical FALLS within applicability domain

 

Uncertainty of the prediction (OECD Principle 4):

The prediction is based on 4 values within the range 555 - 1.00E+03, mg/kg soil dw

Prediction confidence = ± 343, mg/kg soil dw (95.0%)

 

Chemical and biological mechanisms (OECD Principle 5):

Profiling results for the target substance:

DNA binding by OASIS v.1.2: No alert found

DNA binding by OECD: No alert found

Est rogen Receptor Binding: Non binder, without OH or NH2 group

OECD HPV Chemical Categories: Not categorized

Protein binding by OASIS v1.2: No alert found

Protein binding by OECD: No alert found

Protein binding potency: Not possible to classify according to these rules (GSH)

Superfragments: No superfragment

Toxic hazard classification by Cramer (original): High (Class III)

Toxic hazard classification by Cramer (with extensions): High (Class III)

US-EPA New Chemical Categories: Esters (Chronic toxicity)

Applicant's summary and conclusion

Conclusions:
Toxicity of the target chemical (826 mg/kg soil dw) is predicted from category members using read-across based on 4 values within the range 555 - 1.00E+03 mg/kg soil dw from 4 nearest neighbours compared by prediction descriptors.
Executive summary:

Toxicity of the target chemical (826 mg/kg soil dw) is predicted from category members using read-across based on 4 values within the range 555 - 1.00E+03 mg/kg soil dw from 4 nearest neighbours compared by prediction descriptors. Category members are single chemicals or mixtures and are selected based on the profile of the target chemical. Only chemicals having experimental data are listed in the category.

 

The target chemical FALLS within applicability domain of the prediction.

 

The descriptor values for the target chemical and the category members in case they are set of tautomers, set of metabolites or mixtures are calculated using the following rule(s):

"log Kow" - taking the weighted average value

 

The endpoint data used in the prediction is selected from the following database(s):

ECHA CHEM

Below is a summary table for endpoint & descriptor values for the target chemical and the category members. Experimental values from data matrix are presented in bold font. Recalculated endpoint values (if required by selected data usage option in Gap Filling) are presented in italic font. Recalculated endpoint values based on experimental data only are presented in bold and italic font.

 

 

Endpoint(s)

Descriptor(s)

 

Terrest rial Toxicity

log Kow

 

mg/kg soil dw

-

Target chemical

- 

7.34

Cat. member No. 1

555

6.89

Cat. member No. 2

1.00E+03

7.81

Cat. member No. 3

750

7.93

Cat. member No. 4

1.00E+03

6.32