Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water

According to PBT Profiler and EPI Suite the half life period of Phenetole 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 40 days (to qualify the chemical as persistent). Also the diffusion percentage of Phenetole in water medium is 24%. This coupled with the dilution of water shall result in ready biodegradabililty of the chemical.

PBT Profiler

Media

Half-Life 
(days)

Percent in
Medium

Water

15

  24%

 

Fugacity Model by EPI Suite estimation database

Mass Amount

(percent)

Half-Life

(hr)

Emissions

(kg/hr)

Water

24.3

360

1000

 

Fugacity

(atm)

Reaction

(kg/hr)

Advection

(percent)

Reaction

(percent)

Advection

(percent)

Water

4.15e-009

443

230

14.8

7.67

Biodegradation in water and sediment

Based on the Level III Fugacity Model, the half life period of the Phenetole was estimated. The half period of Phenetole in water is 15 days (360 hrs) therefore it is considered that the substance will qualify as not persistent as the half life does not exceed the criteria of 40 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 (3360 hrs) which exceeds the criteria of 120 days.

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 Phenetoledoes 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.

Media

Half-Life 
(days)

Percent in
Each Medium

Water

15

  26%

Sediment

140

  0%

Biodegradation in soil

The PBT Profiler & EPI Suite has estimated thatPhenetoleis expected to be found predominantly in soil and its persistence estimate is based on its transformation in this medium.Its half-life in soil, 30 days (720 hrs). does not exceeds the criteria of 120 days. Therefore,Phenetoleis estimated not to be persistent in the soil environment.

PBT profiler estimate

Media

Half-Life 
(days)

Percent in
Medium

Soil

30

  71%

 EPI Suite:-

 

Mass Amount (percent)

Half-Life (hr)

Emissions (kg/hr)

Soil

73.4

720

1000

 

 

Fugacity (atm)

Reaction (kg/hr)

Advection (kg/hr)

Reaction (percent)

Advection (percent)

Soil

3.17e-008

668

0

22.3

0