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Physical & Chemical properties

Vapour pressure

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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
not specified
GLP compliance:
no
Type of method:
effusion method: vapour pressure balance

Test material

Constituent 1
Chemical structure
Reference substance name:
Ethylene diacetoacetate
EC Number:
226-724-9
EC Name:
Ethylene diacetoacetate
Cas Number:
5459-04-1
Molecular formula:
C10H14O6
IUPAC Name:
ethane-1,2-diyl bis(3-oxobutanoate)

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
0.004 Pa
Temp.:
25 °C
Vapour pressure:
0.008 Pa
Temp.:
50 °C
Vapour pressure:
0.27 Pa

Any other information on results incl. tables

The vapour pressure was measured in the temperature range of 20 °C to 106 °C. Above 55 °C a reasonable vapour pressure could be measured. The measured vapour pressures at the corresponding temperatures are listed in the following table:

 

Temperature / °C

Vapour pressure / hPa

15.8

1.8× 10-5

21.1

4.6× 10-5

26.3

1.0× 10-4

31.0

2.0× 10-4

35.7

4.5× 10-4

40.1

7.5× 10-4

45.2

1.5× 10-3

50.3

2.5× 10-3

 

The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as shown.

T / °C

p / hPa

 

 

log (p/hPa) = A + B/(C+T[°C])

20

3.81E-05

 

 

A =

15.57926

25

8.24E-05

 

 

B =

-5862.63

50

2.74E-03

 

 

C =

273.15

Applicant's summary and conclusion

Conclusions:
The following vapour pressure values for the test item were extrapolated from the experimental data:

T / °C p / hPa p / Pa
20 3.8 × 10-5 3.8 × 10-3
25 8.2 × 10-5 8.2 × 10-3
50 2.7 × 10-3 2.7 × 10-1

Executive summary:

The vapour pressure of the test item was determined according to theEuropeanCommission Regulation (EC) No. 440/2008, A.4 Vapour pressure:Vapour pressure balance (effudion method). The vapour pressure was measured in the range from 20°C to 106°C. Above 55 °C a reasonable vapour pressure could be measured. The results were included into a plot an the required vapour pressures were calulated out of it.