Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

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Additional information

Based upon the half life of allyl acetoacetate in the various environmental compartments, it can be inferred that the chemical is non-persistent in air (being subject to rapid photo-transformation) as well as in water and soil compartment. It is only persitent in the sediment medium though it does not diffuse into the sediment compartment with the percentage diffusion being alomost negligible. Thus, it is concluded that allyl acetoacetate can be considered to be a bio-degradable.

The bio-degradation details are detailed below:

Biodegradation in water:

The half life period of allyl acetoacetate in water is 15 days and based on this value it can be concluded that the chemical is not persistent in water medium since the half life is less than the threshold of 60 days (to qualify the chemical as persistent). Also the diffusion percentage of allyl acetoacetate in water medium is 38%. This coupled with the dilution of water shall result in ready biodegradabililty of the chemical.

Data is from PBT Profiler :

Media

Half life (days)

Percent in each medium

Water

15

38 %

 

Biodegradation in water and sediment :

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%

 

Biodegradation in soil :

The PBT Profiler & EPI Suite has estimated that allyl acetoacetate is expected to be found predominantly in soil and its persistence estimate is based on its availability in this medium. Its half-life in soil, 30 days (720 hrs) which does not exceed the EPA criteria of >= 2 months (and <= 6 months). Therefore, allyl acetoacetate is estimated to be non-persistent in the soil environment.

Data is from PBT Profiler :

Media

Half-Life 
(days)

Percent in
Medium

Soil

30

   61%

 

Fugacity model by EPI Suite estimation database:

 

Mass Amount

(percent)

Half-Life

(hr)

Emissions

(kg/hr)

Soil

61.2

720

1000

 

Fugacity

(atm)

Reaction

(kg/hr)

Advection

(kg/hr)

Reaction

(percent)

Advection

(percent)

Soil

8.4e-011

721

0

24

0