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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

The half life period of allyl acetoacetate in water is 15 days where as in sediment the half life is 140 days

Key value for chemical safety assessment

Half-life in freshwater:
15 d
at the temperature of:
25 °C
Half-life in freshwater sediment:
140 d
at the temperature of:
25 °C

Additional information

Based on the Level III Fugacity Model, the half life period of allyl acetoacetate was estimated. The half life period of allyl acetoacetate in water is 15 days , therfore it is considered that the substance will qualify as not persistent as the half life does not exceed the EPA criteria of 60 days. So, it can be confirmed that the substance is readily biodegradable in water medium where as in sediment the half life is 140 days and based on this value, it can be inferred that the substance is persistent in sediment medium and is not readily biodegradable probably due to the anaerobic conditions existing in most sediments. However, it can be observed that allyl acetoacetate does not diffuse in the sediment medium since it's percentage in the sediment medium is reported to be 0% and hence persistence in the sediment compartment is not likely to be critical.

Data is from PBT Profiler :

Media

Half-Life 
(days)

Percent in
Each Medium

Water

15

   38%

Sediment

140

    0%