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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:
September 25, 2018 - September 27, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: Knudsen cell
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: calculated
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: calculated
Test no.:
#1
Temp.:
50 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: calculated

The vapour pressure was measured in the temperature range of 45 °C to 120 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1. After the measurement no mass loss was determined.

Table 1: Measured vapour pressures and corresponding temperatures

 Temperature /°C  Vapour pressure / hPa

45

9.3E-6

50

2.8E-6

55

4.1E-6

65

6.7E-6

75

n.e

120

n.e

n.e.: not evaluable

The detection limit (1x10-5hPa) was used for the calculation as all measured vapour pressures were below the detection limit.

Table 2: Calculated vapour pressure at 20, 25 and 50 °C

 T / °C

 p /hPa

 p / Pa

20

<4.6E-10

<4.6E-8

25

<8.9E-10

<8.9E-8

50

<1.8E-8

<1.8E-6

This is a conservative estimation of the vapour pressure of the test item for the listed temperatures.

Conclusions:
The vapour pressure of the test item was below the detection limit of 1x10-7 Pa.
Executive summary:

A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item using the effusion method: Knudsen cell. The vapour pressure was measured in the temperature range of 45 °C to 120 °C. After the measurement no mass loss was determined. The vapour pressure of the test item was below the detection limit of 1x10-7 Pa. The vapour pressure of the test item was calculated to be <4.6E-8 Pa at 20 °C, <8.9E-8 Pa at 25 °C and <1.8E-6 Pa at 50 °C, respectively.

Description of key information

The vapour pressure of the test item was below the detection limit of 1x10-7 Pa.

The vapour pressure of the test item was estimated to be <4.6E-8 Pa at 20 °C, <8.9E-8 Pa at 25 °C and <1.8E-6 Pa at 50 °C, respectively.

Key value for chemical safety assessment

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

Additional information

A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item using the effusion method: Knudsen cell (reference 4.6 -1). The vapour pressure was measured in the temperature range of 45 °C to 120 °C. After the measurement no mass loss was determined. The vapour pressure of the test item was below the detection limit of 1x10-7 Pa. The vapour pressure of the test item was estimated to be <4.6E-8 Pa at 20 °C, <8.9E-8 Pa at 25 °C and <1.8E-6 Pa at 50 °C, respectively.