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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2020-03-17 to 2020-04-20
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
no
Type of method:
effusion method: Knudsen cell
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
0 Pa

The vapour pressure was measured in the temperature range of 25 °C to 121 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1. After the measurement a mass loss of approx. 3.5% (w/w) was determined.

Table 1: Measured vapour pressures and corresponding temperatures

Temperature [°C]

Vapour pressure [hPa]

25.4

-*

40.5

-*

55.4

-*

70.5

1.04x10E-5

85.5

2.67x10E-5

100.5

9.08x10E-5

110.6

2.36x10E-4

120.5

5.81x10E-4

100.5

8.18x10E-5

*: Below the detection limit of 10E-5 hPa

The vapour pressure values for 20, 25 and 50 °C were extrapolated using Antoine constants.

Conclusions:
The following vapour pressures were determined for the test item:
20 °C: 3.6 x 10E-6 Pa
25 °C: 6.7 x 10E-6 Pa
50 °C: 1.1 x 10E-4 Pa
Executive summary:

The vapour pressure of the test item was determined according to OECD guideline 104 by the effusion method. The vapour pressure was measured in the temperature range of 25 °C to 121 °C. The following vapour pressures for the test item were extrapolated:

20 °C: 3.6 x 10E-6 Pa

25 °C: 6.7 x 10E-6 Pa

50 °C: 1.1 x 10E-4 Pa

Description of key information

The vapour pressure of the test item was determined according to OECD guideline 104 by the effusion method. The vapour pressure was measured in the temperature range of 25 °C to 121 °C. The following vapour pressures for the test item were extrapolated:

20 °C: 3.6 x 10E-6 Pa

25 °C: 6.7 x 10E-6 Pa

50 °C: 1.1 x 10E-4 Pa

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information