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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04.12.91 - 23.05.92
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: Knudsen cell
Key result
Temp.:
20 °C
Vapour pressure:
0.004 Pa
Key result
Temp.:
100 °C
Vapour pressure:
20 Pa
Key result
Temp.:
50 °C
Vapour pressure:
0.1 Pa

Individual results

Vapour pressure at 293K

Measurement

Vapour Pressure/Pa

1st

0.0023

2nd

0.0044

3rd

0.0053

Vapour pressure at 323K

Measurement

Vapour Pressure/Pa

1st

0.11

2nd

0.16

3rd

0.16

Vapour pressure at 373K

Measurement

Vapour Pressure/Pa

1st

17

2nd

17

3rd

13

Conclusions:
The vapour pressure of the test item was determined to be 0.004 Pa (20 °C), 0.1 Pa (50 °C) and 20 Pa (100 °C).
Executive summary:

A study was performed according to EU method A.4 in order to determine the vapour pressure of the test item by using the effusion method. The vapour pressure was measured by determining the boiling point of the test item at various temperatures. The vapour pressures of the test item at 20, 50 and 100 °C determined to be:  0.004 (20 °C), 0.1 Pa (25 °C) and 20 Pa (100 °C).

Description of key information

The vapour pressure of the test item was determined to be 0.004Pa (20 °C), 0.1 Pa (50 °C) and 20 Pa (100 °C) using the effusion method.

Key value for chemical safety assessment

Vapour pressure:
0.004 Pa
at the temperature of:
20 °C

Additional information

A study was performed according to EU method A.4 in order to determine the vapour pressure of the test item by using the effusion method. The vapour pressure was measured by determining the boiling point of the test item at various temperatures. The vapour pressures of the test item at 20, 50 and 100 °C determined to be:  0.004 Pa (20 °C), 0.1 Pa (25 °C) and 20 Pa (100 °C). (reference 4.6-1).