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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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biodegradation in water: sediment simulation testing
Data waiving:
other justification
Justification for data waiving:
biodegradation in water: simulation testing on ultimate degradation in surface water
Data waiving:
exposure considerations
Justification for data waiving:

Description of key information

In accordance with Regulation (EC) No 1907/2006, Annex IX, Section 9.2 and, Column 2, the simulation test on ultimate degradation in surface water does not need to be conducted as the chemical safety assessment according to Annex I indicates that there is no need to investigate further the degradation of the substance and its degradation products. The test item and the hydrolytic products were assessed. The test item is poorly biodegradable and hydrolyses slowly. Nevertheless, it gets degraded and metabolized. Sebacic acid was a metabolite that was detected. It is readily biodegradable. The other metabolite that was detected during the hydrolytic process was 2,2,6,6-tetramethylpiperidin-4-ol which is not classified as PBT substance. Furthermore, QSAR predictions by CATALOGIC revealed, that no hazard regarding the potential for bioaccumulation for the degradation products was shown.  Therefore, neither a risk nor a hazard for the environment could be identified. Moreover, the risk characterization ratios (RCRs) of the chemical safety assessment are below 1, indicating that the risks are acceptable. Therefore, no simulated biodegradation studies in water and sediment are provided.

Key value for chemical safety assessment

Additional information