Registration Dossier
Registration Dossier
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EC number: 202-613-0 | CAS number: 97-86-9
Distribution modelling
Administrative data
- Endpoint:
- distribution modelling
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 015
Materials and methods
- Model:
- calculation according to Mackay, Level III
- Calculation programme:
- EPIWIN 4.10
- Release year:
- 2 008
- Media:
- air - biota - sediment(s) - soil - water
Test material
- Reference substance name:
- Isobutyl methacrylate
- EC Number:
- 202-613-0
- EC Name:
- Isobutyl methacrylate
- Cas Number:
- 97-86-9
- Molecular formula:
- C8H14O2
- IUPAC Name:
- isobutyl methacrylate
Constituent 1
Study design
- Test substance input data:
- Distributions were calculated with the following factors:
isobutyl methacrylate
molecular weight: 142.2
Henry's LC : 0.000523 atm-m3/mole (Henry database)
Vapor Press : 1.58 mm Hg (user-entered)
Log Kow : 2.95 (user-entered)
Soil Koc : 46.5 (KOCWIN MCI method)
Results and discussion
Percent distribution in media
- Other distribution results:
- The potential environmental distribution of isobutyl methacrylate obtained from generic level III fugacity model under two emission scenarios is shown in the table.
The results show that if isobutyl 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. i-BMA does not have a significant presence in soil or sediment.
Compartment Amount %
Release to air Release to water
Air 95.8 2.09
Water 3.34 97.5
Soil 0.809 0.0176
Sediment 0.01 0.366
Any other information on results incl. tables
Level III Fugacity Model (Full-Output):
=======================================
Chem Name : 2-Propenoic acid, 2-methyl-, 2-methylpropyl ester
Molecular Wt: 142.2
Henry's LC : 0.000523 atm-m3/mole (Henry database)
Vapor Press : 1.58 mm Hg (user-entered)
Log Kow : 2.95 (user-entered)
Soil Koc : 46.5 (KOCWIN MCI method)
Release to air:
| Mass Amount (percent) | Half-Life(hr) | Emissions(kg/hr) | |
| Air | 95.8 | 9.97 | 1000 |
| Water | 3.34 | 360 | 0 |
| Soil | 0.809 | 720 | 0 |
| Sediment | 0.0125 | 3.24e+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 | 8.04e-012 | 0.842 | 0 .437 | 0.0842 | 0.0437 |
| Soil | 1.52e-011 | 0.102 | 0 | 0.0102 | 0 |
| Sediment | 7.13e-012 | 0.000351 | 0.0000328 | 0.0000351 | 3.28e-06 |
Persistence Time: 13.1 hr
Reaction Time: 15 hr
Advection Time: 104 hr
Percent Reacted: 87.4
Percent Advected: 12.6
Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):
Air: 9.971
Water: 360
Soil: 720
Sediment: 3240
Biowin estimate: 3.025 (weeks )
Advection Times (hr):
Air: 100
Water: 1000
Sediment: 5e+004
Release to water:
| Mass Amount (percent) | Half-Life(hr) | Emissions(kg/hr) | |
| Air | 2.09 | 9.97 | 0 |
| Water | 97.5 | 360 | 1000 |
| Soil | 0.0176 | 720 | 0 |
| Sediment | 0.366 | 3.24e+003 | 0 |
| Fugacity(atm) | Reaction(kg/hr) | Advection(kg/hr) | Reaction(percent) | Advection(percent) | |
| Air | 7.94e-012 | 321 | 46.2 | 32.1 | 4.62 |
| Water | 3.97e-09 | 416 | 216 | 41.6 | 21.6 |
| Soil | 5.61e-012 | 0.0375 | 0 | 0.00375 | 0 |
| Sediment | 3.52e-09 | 0.173 | 0.0162 | 0.0173 | 0.00162 |
Persistence Time: 222 hr
Reaction Time: 300 hr
Advection Time: 845 hr
Percent Reacted: 73.8
Percent Advected: 26.2
Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):
Air: 9.971
Water: 360
Soil: 720
Sediment: 3240
Biowin estimate: 3.025 (weeks )
Advection Times (hr):
Air: 100
Water: 1000
Sediment: 5e+004
Applicant's summary and conclusion
- Conclusions:
- Using a valid modeling approach, if the test substance 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.
- Executive summary:
Using a valid modeling approach, if the test substance 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.
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