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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Key value for chemical safety assessment

Half-life in freshwater:
1 440 h
at the temperature of:
25 °C
Half-life in freshwater sediment:
13 000 h
at the temperature of:
25 °C

Additional information

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 0.0216 1.05 1000

Water 9.25 1.44e+003 1000

Soil 67 2.88e+003 1000

Sediment 23.7 1.3e+004 0

Persistence Time: 2.17e+003 hr

Based on the conclusions drawn from the study in section 5.2.1, we consider the substance to be ultimately (possibly inherently) biodegradable. The ready biodegradability study shown in section 5.2.1 demonstrates that the degradation was relatively constant up to the end of the study period and reached a level of 24% degradation. This suggests that the degradation was not due to impurities or background substances, and would have continued if the study had been longer. We therefore conclude that the substance is ultimately biodegradable.