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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)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a (Q)SAR model, with limited documentation / justification, but validity of model and reliability of prediction considered adequate based on a generally acknowledged source

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2013

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:

Level III Fugacity Model (Full-Output):
=======================================
Chem Name : 2-Propenamide, 2-methyl-
Molecular Wt: 85.11
Henry's LC : 1.26e-009 atm-m3/mole (calc VP/Wsol)
Vapor Press : 0.00112 mm Hg (user-entered)
Liquid VP : 0.0078 mm Hg (super-cooled)
Melting Pt : 110 deg C (user-entered)
Log Kow : -0.15 (user-entered)
Soil Koc : 8.91 (KOCWIN MCI method)

Results and discussion

Percent distribution in media

Other distribution results:
The potential environmental distribution of methacrylamide obtained from generic level III fugacity model under three  emission scenarios is shown in the table. 
The results show that if methacrylamide is released mainly into air, it mainly remains in the soil.  If it is released into water, it also mainly remains in the water. And if it is released mainly into soil, it mainly remains in the soil. Methacrylamide is predicted to partition mainly into soil and water and mainly to a small degree into sediment.

Compartment                         Amount %                              
 Release 100% to air     Release 100% to water Release 100% to soil         
Air                          0.07                         0 0
Water                      18.1                       99.8 14.3
Soil                      81.8                         0 85.7
Sediment                0.04                    0.2 0.03

Any other information on results incl. tables

Level III Fugacity Model (Full-Output):

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

Chem Name : 2-Propenamide, 2-methyl-

Molecular Wt: 85.11

Henry's LC : 1.26e-009 atm-m3/mole (calc VP/Wsol)

Vapor Press : 0.00112 mm Hg (user-entered)

Liquid VP : 0.0078 mm Hg (super-cooled)

Melting Pt : 110 deg C (user-entered)

Log Kow : -0.15 (user-entered)

Soil Koc : 8.91 (KOCWIN MCI method)

   Mass Amount (percent)  Half-Life (hr)  Emissions (kg/hr)
 Air  0.0264  10.7  1000
 Water  31.4  360  1000
 Soil  68.5  720  1000
 Sediment  0.0692  3.24e+003  0

   Fugacity (atm)  Reaction (kg/hr)  Advection (kg/hr)  Reaction (percent)  Advection (percent)
 Air  1.43e-012  32.2  4.97  1.07  0.166
 Water  4.36e-014  1.13e+003  589  37.8  19.6
 Soil  2.06e-012  1.24e+003  0  41.3  0
 Sediment  3.96e-014  0.278  0.026  0.00926  0.000866

Persistence Time: 626 hr

Reaction Time: 781 hr

Advection Time: 3.16e+003 hr

Percent Reacted: 80.2

Percent Advected: 19.8

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

Air: 10.68

Water: 360

Soil: 720

Sediment: 3240

Biowin estimate: 2.957 (weeks )

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004

Level III Fugacity Model (Full-Output):

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

Chem Name : 2-Propenamide, 2-methyl-

Molecular Wt: 85.11

Henry's LC : 1.26e-009 atm-m3/mole (calc VP/Wsol)

Vapor Press : 0.00112 mm Hg (user-entered)

Liquid VP : 0.0078 mm Hg (super-cooled)

Melting Pt : 110 deg C (user-entered)

Log Kow : -0.15 (user-entered)

Soil Koc : 8.91 (KOCWIN MCI method)

 Mass Amount (percent)  Half-Life (hr)  Emissions (kg/hr)
 Air   0.0679  10.7  1000
 Water  18.1  360  0
 Soil  81.8  720  0
 Sediment  0.04  3.24e+003  0

 Fugacity (atm)  Reaction (kg/hr)  Advection (kg/hr)  Reaction (percent)  Advection (percent)
 Air  1.42e-012  32.2  4.96  3.22  0.496
 Water 9.8e-015  255  132  25.5 13.2 
 Soil  9.57e-013 575  0  57.5  0
 Sediment 8.9e-015  0.0625  0.00584  0.00625  0.000584

Persistence Time: 731 hr

Reaction Time: 848 hr

Advection Time: 5.32e+003 hr

Percent Reacted: 86.3

Percent Advected: 13.7

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

Air: 10.68

Water: 360

Soil: 720

Sediment: 3240

Biowin estimate: 2.957 (weeks )

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004

Level III Fugacity Model (Full-Output):

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

Chem Name : 2-Propenamide, 2-methyl-

Molecular Wt: 85.11

Henry's LC : 1.26e-009 atm-m3/mole (calc VP/Wsol)

Vapor Press : 0.00112 mm Hg (user-entered)

Liquid VP : 0.0078 mm Hg (super-cooled)

Melting Pt : 110 deg C (user-entered)

Log Kow : -0.15 (user-entered)

Soil Koc : 8.91 (KOCWIN MCI method)

 Mass Amount (percent)  Half-Life (hr)  Emissions (kg/hr)
 Air 6.38e-007  10.7  0
 Water  99.8  360  1000
 Soil  0.000769  720  0
 Sediment  0.22  3.24e+003  0

 Fugacity (atm)  Reaction (kg/hr)  Advection (kg/hr)  Reaction (percent)  Advection (percent)
 Air  6.27e-018  0.000142  2.19e-005  1.42e-005  2.19e-006
 Water 2.53e-014  658  342  65.8  34.2
 Soil 4.22e-018 0.00254 0   0.000254  0
 Sediment 2.3e-014  0.161  0.0151  0.0161  0.00151

Persistence Time: 343 hr

Reaction Time: 521 hr

Advection Time: 1e+003 hr

Percent Reacted: 65.8

Percent Advected: 34.2

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

Air: 10.68

Water: 360

Soil: 720

Sediment: 3240

Biowin estimate: 2.957 (weeks )

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004

Level III Fugacity Model (Full-Output):

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

Chem Name : 2-Propenamide, 2-methyl-

Molecular Wt: 85.11

Henry's LC : 1.26e-009 atm-m3/mole (calc VP/Wsol)

Vapor Press : 0.00112 mm Hg (user-entered)

Liquid VP : 0.0078 mm Hg (super-cooled)

Melting Pt : 110 deg C (user-entered)

Log Kow : -0.15 (user-entered)

Soil Koc : 8.91 (KOCWIN MCI method)

 Mass Amount (percent)  Half-Life (hr)  Emissions (kg/hr)
 Air 0.000104  10.7  0
 Water  14.3  360  0
 Soil  85.7  720  1000
 Sediment  0.0315  3.24e+003  0

 Fugacity (atm)  Reaction (kg/hr)  Advection (kg/hr)  Reaction (percent)  Advection (percent)
 Air  2.4e-015 0.0543  0.00837  0.00543  0.000837
 Water 8.5e-015  221 115   22.1  11.5
 Soil 1.1e-012 664 0   66.4  0
 Sediment 7.72e-015  0.0542  0.00507  0.00542  0.000507

Persistence Time: 805 hr

Reaction Time: 909 hr

Advection Time: 7.01e+003 hr

Percent Reacted: 88.5

Percent Advected: 11.5

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

Air: 10.68

Water: 360

Soil: 720

Sediment: 3240

Biowin estimate: 2.957 (weeks )

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004

Applicant's summary and conclusion

Conclusions:
Using a valid modeling method, if methacrylamide is released mainly into air, it mainly remains in the soil. If it is released into water, it also mainly remains in the water. And if it is released into soil, it mainly remains in the soil. Methacrylamide is predicted to partition only to a small degree into sediment.
Executive summary:

Using a valid modeling method, if methacrylamide is released mainly into air, it mainly remains in the soil. If it is released into water, it also mainly remains in the water. And if it is released into soil, it mainly remains in the soil. Methacrylamide is predicted to partition only to a small degree into sediment.