Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
distribution modelling
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Scientifically acceptable method

Data source

Reference
Reference Type:
other: Mackay Level 1 calculation
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Model:
calculation according to Mackay, Level I
Media:
air - biota - sediment(s) - soil - water

Test material

Constituent 1
Chemical structure
Reference substance name:
tert-butyl methacrylate
EC Number:
209-548-7
EC Name:
tert-butyl methacrylate
Cas Number:
585-07-9
Molecular formula:
C8H14O2
IUPAC Name:
tert-butyl 2-methylprop-2-enoate
Test material form:
other: liquid

Study design

Test substance input data:
- Molar mass: 142.2 g/mol
- Data temperature: 25 °C
- Water solubility: 550 mg/L
- Vapour pressure: 770 Pa
- log Pow: 2.67
- Melting point: -48 °C

Results and discussion

Percent distribution in media

Air (%):
98.5
Water (%):
1.43
Soil (%):
0.05
Sediment (%):
0.05

Applicant's summary and conclusion

Conclusions:
According to the Mackay Level I model, the test item will mainly evaporate into the air (98.5 %)
Executive summary:

To assess the distribution of the test item between the different environmental compartments the distribution was predicted with the Mackay Level 1 model. Phys-chem data as molar mass, temperature, water solubility, vapor pressure, log Pow and melting point were used as data input. For the different media the following distribution was predicted:


 


























Compartement



Percent distribution predicted



Air



98.5



Water



1.43



Soil



0.05



Sediment



0.05