Registration Dossier
Registration Dossier
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EC number: 211-708-6 | CAS number: 688-84-6
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:
- 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 substance name:
- 2-ethylhexyl methacrylate
- EC Number:
- 211-708-6
- EC Name:
- 2-ethylhexyl methacrylate
- Cas Number:
- 688-84-6
- Molecular formula:
- C12H22O2
- IUPAC Name:
- 2-ethylhexyl methacrylate
- Test material form:
- liquid
Constituent 1
Study design
- Test substance input data:
- Distributions were calculated with the following factors:
2-ethylhexy methacrylate
molecular weight: 198.31
Physical Property Inputs:
Log Kow (octanol-water): 4.95
Boiling Point (deg C) : 227.6
Melting Point (deg C) : -50.00
Vapor Pressure (mm Hg) : 0.0488
Water Solubility (mg/L): 3.1
EPIWIN inputs:
Henry's LC : 0.0041 atm-m3/mole (calc VP/Wsol)
Soil Koc : 562 (KOCWIN MCI method)
Results and discussion
Percent distribution in media
- Other distribution results:
- The potential environmental distribution of 2-ethylhexyl methacrylate obtained from generic level III fugacity model under two emission scenarios is shown in the table.
The results show that if 2-ethylhexyl 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. 2-EHMA is predicted to partition to a small degree into soil and sediment.
Compartment Amount %
Release 100% to air Release 100% to water
Air 98.6 2.46
Water 0.53 95.5
Soil 0.854 0.0213
Sediment 0.0114 2.06
Any other information on results incl. tables
Level III Fugacity Model (Full-Output):
=======================================
Chem Name : 2-Propenoic acid, 2-methyl-, 2-ethylhexyl ester
Molecular Wt: 198.31
Henry's LC : 4.1e-003 atm-m3/mole (calc VP/Wsol)
Vapor Press : 0.0488 mm Hg (user-entered)
Log Kow : 4.95 (user-entered)
Soil Koc : 562 (KOCWIN MCI method)
| Mass Amount (percent) | Half-Life (hr) | Emissions (kg/hr) | |
| Air | 98.6 | 8.56 | 1000 |
| Water | 0.53 | 360 | 0 |
| Soil | 0.854 | 720 | 0 |
| Sediment | 0.0114 | 3.24e+003 | 0 |
| Fugacity (atm) | Reaction (kg/hr) | Advection (kg/hr) | Reaction (percent) | Advection (percent) | |
| Air | 1.35e-011 | 890 | 110 | 89 | 11 |
| Water | 6.08e-012 | 0.114 | 0 .059 | 0.0114 | 0.0059 |
| Soil | 7.92e-012 | 0.0917 | 0 | 0.00917 | 0 |
| Sediment | 4.55e-012 | 0.000272 | 0.0000255 | 0.0000272 | 2.55e-06 |
Persistence Time: 11.2 hr
Reaction Time: 12.5 hr
Advection Time: 101 hr
Percent Reacted: 89
Percent Advected: 11
Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):
Air: 8.563
Water: 360
Soil: 720
Sediment: 3240
Biowin estimate: 3.199 (weeks )
Advection Times (hr):
Air: 100
Water: 1000
Sediment: 5e+004
Level III Fugacity Model (Full-Output):
=======================================
Chem Name : 2-Propenoic acid, 2-methyl-, 2-ethylhexyl ester
Molecular Wt: 198.31
Henry's LC : 4.1e-003 atm-m3/mole (calc VP/Wsol)
Vapor Press : 0.0488 mm Hg (user-entered)
Log Kow : 4.95 (user-entered)
Soil Koc : 562 (KOCWIN MCI method)
| Mass Amount (percent) | Half-Life(hr) | Emissions(kg/hr) | |
| Air | 2.46 | 8.56 | 0 |
| Water | 95.5 | 360 | 1000 |
| Soil | 0.0213 | 720 | 0 |
| Sediment | 2.06 | 3.24e+003 | 0 |
| Fugacity(atm) | Reaction(kg/hr) | Advection(kg/hr) | Reaction(percent) | Advection(percent) | |
| Air | 6.02e-012 | 396 | 48.9 | 39.6 | 4.89 |
| Water | 1.95e-08 | 365 | 190 | 36.5 | 19 |
| Soil | 3.52e-012 | 0.0408 | 0 | 0.00408 | 0 |
| Sediment | 1.46e-08 | 0.875 | 0.0818 | 0.0875 | 0.00818 |
Persistence Time: 199 hr
Reaction Time: 261 hr
Advection Time: 832 hr
Percent Reacted: 76.1
Percent Advected: 23.9
Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):
Air: 8.563
Water: 360
Soil: 720
Sediment: 3240
Biowin estimate: 3.199 (weeks )
Advection Times (hr):
Air: 100
Water: 1000
Sediment: 5e+004
Applicant's summary and conclusion
- Conclusions:
- Using a valid modeling method, if 2-ethylhexyl methacrylate is released into air, it mainly remains in the air; if it is released into water, it mainly remains in the water. 2-EHMA is predicted to partition to a small degree into air, soil and sediment.
- Executive summary:
Using a valid modeling method, if 2-ethylhexyl methacrylate is released into air, it mainly remains in the air; if it is released into water, it mainly remains in the water. 2-EHMA is predicted to partition to a small degree into air, soil and sediment.
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