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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:
from 2018-07-19 to 2018-07-30
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
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: Knudsen cell
Key result
Temp.:
20 °C
Vapour pressure:
0.011 Pa
Temp.:
25 °C
Vapour pressure:
0.019 Pa

The vapour pressure was measured in the temperature range of 50 to 150 °C. For the evaluation the vapour pressure values in the range of 75 to 105 °C were used.

Table 1. Results of the Effusion method

Stage No.

Temperature, °C

Δm/Δt, mg/min

Vapour pressure, Pa

1

75

1.1492 x 10-2

2.5651

2

80

1.3504 x 10-2

3.0359

3

85

2.0460 x 10-2

4.6320

4

90

3.3017 x 10-2

7.5269

5

95

5.0122 x 10-2

1.1505 x 101

6

100

6.6101 x 10-2

1.5275 x 101

7

105

9.2918 x 10-2

2.1615 x 101

 

Conclusions:
The vapour pressure of the test item was determined to be 0.01097 Pa at 20 °C and 0.01932 Pa at 25 °C, respectively.
Executive summary:

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures between 50 and 150 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 75 to 105 °C were used. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C. The vapour pressure was calculated to be 0.01097 Pa at 20 °C and 0.01932 Pa at 25 °C, respectively.

Description of key information

The vapour pressure of the test item was determined to be 0.01097 Pa at 20 °C and 0.01932 Pa at 25 °C, respectively.

Key value for chemical safety assessment

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

Additional information

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures between 50 and 150 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 75 to 105 °C were used. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C. The vapour pressure was calculated to be 0.01097 Pa at 20 °C and 0.01932 Pa at 25 °C, respectively.