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Diss Factsheets

Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
supporting study
Study period:
1990
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: well described report.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1990
Report date:
1990

Materials and methods

Model:
other: estimated using a unit world model developed by Mackay
Calculation programme:
Mackay, D., Paterson, S.,"Calculating Fugacity," Environ. Sci. Technol., 15. 1006 (1981)
This model predicts the distribution of a compound at equilibrium in the various compartments based on its physical properties.
Release year:
1 981
Media:
air - biota - sediment(s) - soil - water

Test material

Constituent 1
Chemical structure
Reference substance name:
2-methoxy-1-methylethyl acetate
EC Number:
203-603-9
EC Name:
2-methoxy-1-methylethyl acetate
Cas Number:
108-65-6
Molecular formula:
C6H12O3
IUPAC Name:
2-methoxy-1-methylethyl acetate
Details on test material:
-Name of test material (as cited in study report): Propylene Glycol Methyl Ether Acetate (PMA)
-Molecular Weight: 90.1
-Boiling point: 120.1 Deg. C
-Vapour Pressure at 25 Deg. C (mm Hg): 3.7
-Water Solubility (mg/L): 1.98 x 105

Study design

Test substance input data:
Molecular Weight: 90.1
Boiling point: 120.1 Deg. C
Vapour Pressure at 25 Deg. C (mm Hg): 3.7
Water Solubility (mg/L): 1.98 x 105

Results and discussion

Percent distribution in media

Air (%):
10.22
Water (%):
89.73
Soil (%):
0.03
Sediment (%):
0.02
Susp. sediment (%):
0
Biota (%):
0

Applicant's summary and conclusion

Conclusions:
Results from the soil transport model indicate that the compounds will tend to move with the water front with little tendency to adsorb to soil.
Executive summary:

An environmental assessment was made for the representative glycol ethers DOWANOL™ PM (propylene glycol methyl ether), DOWANOL PMA (propylene glycol methyl ether acetate), and DOWANOL PPh (propylene glycol phenol ether) using available data and results from “unit world” and soil transport models. Because of the typically high water solubilities and low vapor pressures of the glycol ethers, the unit world model predicts that the compounds will partition predominately into the water column with little tendency to volatilize, bioconcentrate in aquatic organisms, or adsorb to soil or sediments. Results from the soil transport model indicate that the compounds will tend to move with the water front with little tendency to adsorb to soil. Biodegradation of the glycol ethers is likely to be a key factor controlling their fate in the environment. Biochemical oxygen demand (BOD) data reported in the literature suggest that the compounds are relatively susceptible to biodegradation and are unlikely to persist in the environment.