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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: ready biodegradability
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
Remarks:
Internationally accepted method, EPI-Suite, EPA (USA)
Justification for type of information:
See attached the QMRF and QPRF for the QSAR model
Reference:
Composition 0
Guideline:
other: REACH Guidance on QSARs R.6
Principles of method if other than guideline:
Howard, P.H., Boethling, R.S., Stiteler, W.M., Meylan, W.M., Hueber, A.E., Beauman, J.A., Larosche, M.E. 1992. Predictive model for aerobic biodegradability developed from a file of evaluated biodegradation data. Environ. Toxicol. Chem. 11:593-603.
Test material information:
Composition 1
Specific details on test material used for the study:
SMILES: OC(=O)C(N)CCCNC(N)=[N+](H)H.[Cl-]
Key result
Parameter:
probability of ready biodegradability (QSAR/QSPR)
Remarks on result:
not readily biodegradable based on QSAR/QSPR prediction

Biowin1 (Linear Model) : 0.8738

Biowin2 (Non-Linear Model) : 0.8545

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.1227 (weeks)

Biowin4 (Primary Survey Model) : 3.9726 (days)

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.3882

Biowin6 (MITI Non-Linear Model): 0.2206

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.6746

Ready Biodegradability Prediction: NO

Validity criteria fulfilled:
not applicable
Interpretation of results:
not readily biodegradable
Conclusions:
The test substance was predicted to be not readily biodegradable (EPI-Suite, BIOWIN v4.10).
Executive summary:

The test substance was predicted to be not readily biodegradable (EPI-Suite, BIOWIN v4.10).

Description of key information

Key Study. Data from EPI-Suite, EPA (USA) / BIOWIN v4.10 calculation method. The test substance was predicted to be not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information