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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Further biodegradation testing of teh substance, including biodegradation simulation testing in surface water or sediment, is waived, in accordance with Regulation (EC) No.1907/2006, Annexes VIII and IX, Column 2. 

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Additional information

According to Regulation (EC) No.1907/2006, Annexes VIII and IX, Column 2, further biodegradation testing, including testing for ultimate biodegradation in surface water or sediment, shall be proposed if the chemical safety assessment according to Annex 1 indicates the need to investigate further the degradation of the substance or its degradation products; additional testing need not be proposed if direct and indirect exposure to the relevant environmental compartment is unlikely. The chemical safety assessment did not indicate the need to investigate the degradation of the substance; the risk characterisation ratios for surface water are below one. Therefore, in accordance with Annex I, the risks are considered to be controlled.

According to Regulation (EC) No.1907/2006, Annexes VIII and IX, Column 2, further biodegradation testing, including testing for ultimate biodegradation in sediment need not be conducted if direct and indirect exposure to sediments is unlikely. The predicted Koc for the substance is 4.913; this value falls substantially below the range of Koc values of 500-1000, below which substances are unlikely to adsorb to sediment. The chemical safety assessment did not indicate the need to investigate the degradation of the substance; the risk characterisation ratios for sediment are below one. Therefore, in accordance with Annex I, the risks are considered to be controlled.