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Environmental fate & pathways

Distribution modelling

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Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Accepted calculation method.

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2015

Materials and methods

Model:
calculation according to Mackay, Level III
Calculation programme:
A Mackay level III distribution was calculated using the EPI Suite ver. 4.10 (US-EPA, 2008)
Release year:
2 008
Media:
air - biota - sediment(s) - soil - water

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Test substance input data:
Distributions were calculated with the following factors:
butyl methacrylate
molecular weight: 142.20

Physical Property Inputs:
Log Kow (octanol-water): 3.00
Boiling Point (deg C) : 163.00
Melting Point (deg C) : -50.00
Vapor Pressure (mm Hg) : 1.59 (=2.12 hPa)
Water Solubility (mg/L): 360
EPIWIN inputs:
Henry's LC : 0.000496 atm-m3/mole (Henry database)
Soil Koc : 55.3 (KOCWIN MCI method)

Results and discussion

Percent distribution in media

Other distribution results:
The potential environmental distribution of butyl methacrylate obtained from generic level III fugacity model under two  emission scenarios is shown in the table. 
The results show that if butyl  methacrylate is released mainly into air, it mainly remains in the air.  And if it is released into water, it also mainly remains in the water.  n-BMA does not have a significant presence in soil or sediment.
Compartment                         Amount %                              
 Release 100% to air     Release 100% to water         
Air                          96.6                          2.05
Water                         2.68                       97.6
Soil                         0.71                         0.02
Sediment                0.01                        0.36

Any other information on results incl. tables

Level III Fugacity Model (Full-Output):

=======================================

Chem Name : 2-Propenoic acid, 2-methyl-, butyl ester

Molecular Wt: 142.2

Henry's LC : 0.000496 atm-m3/mole (Henry database)

Vapor Press : 1.59 mm Hg (user-entered)

Log Kow : 3 (user-entered)

Soil Koc : 55.3 (KOCWIN MCI method)

 Mass Amount (percent)  Half-Life(hr)  Emissions(kg/hr)
 Air  96.6  9.97  1000
 Water  2.68  208  0
 Soil  0.714  416  0
 Sediment  0.00983  1.87e+003  0

                               

                                        

 Fugacity(atm)  Reaction(kg/hr)  Advection(kg/hr)  Reaction(percent)  Advection(percent)
 Air 2.16e-011  873  126  87.3  12.6
 Water  6.07e-012  1.16  0 .348  0.116  0.0348
 Soil  1.1e-011  0.154  0  0.0154  0
 Sediment  4.79e-012  0.000473  0.0000256  0.0000473  2.56e-06
   

Persistence Time: 13 hr

Reaction Time: 14.9 hr

Advection Time: 103 hr

Percent Reacted: 87.4

Percent Advected: 12.6

Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):

Air: 9.969

Water: 208.1

Soil: 416.2

Sediment: 1873

Biowin estimate: 3.323 (days-weeks )

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004

Level III Fugacity Model (Full-Output):

=======================================

Chem Name : 2-Propenoic acid, 2-methyl-, butyl ester

Molecular Wt: 142.2

Henry's LC : 0.000496 atm-m3/mole (Henry database)

Vapor Press : 1.59 mm Hg (user-entered)

Log Kow : 3 (user-entered)

Soil Koc : 55.3 (KOCWIN MCI method)

 Mass Amount (percent)  Half-Life(hr)  Emissions(kg/hr)
 Air  2.05  9.97 0
 Water  97.6  208  1000
 Soil  0.0152  416  0
 Sediment  0.358  1.87e+003  0

                               

                                        

 Fugacity(atm)  Reaction(kg/hr)  Advection(kg/hr)  Reaction(percent)  Advection(percent)
 Air 6.01e-012  243  35  24.3  3.5
 Water  2.9e-09  555  167  55.5  16.7
 Soil  3.07e-012  0.0431  0  0.00431  0
 Sediment  2.29e-09  0.226  0.0122  0.0226  0.00122

Persistence Time: 171 hr

Reaction Time: 214 hr

Advection Time: 847 hr

Percent Reacted: 79.8

Percent Advected: 20.2

Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):

Air: 9.969

Water: 208.1

Soil: 416.2

Sediment: 1873

Biowin estimate: 3.323 (days-weeks )

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004

Applicant's summary and conclusion

Conclusions:
Using a valid modeling method, if butyl  methacrylate is released mainly into air, it mainly remains in the air; if it is released into water, it  mainly remains in the water.  n-BMA does not have a significant presence in soil or sediment.
Executive summary:

Using a valid modeling method, if butyl  methacrylate is released mainly into air, it mainly remains in the air; if it is released into water, it  mainly remains in the water.  n-BMA does not have a significant presence in soil or sediment.