tert-butyl methacrylate

Distribution modelling

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

Test material information

Constituent 1

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