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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:
Study starting date: 2017-09-14; Experimental starting date: 2017-12-05; Experimental completion date: 2017-12-08
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:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0.001 Pa
Key result
Vapour pressure:
0.003 Pa

Effusion method: Knudsen cell

The vapour pressure was measured in the temperature range of 111 to 151 °C. The measured vapour pressure values together with the measured temperatures are listed in Table 1:

Table1:    Results of the Effusion method

No.

Temperature / °C

Vapour pressure / Pa

1

111

5.03 × 10-2

2

121

7.39 × 10-2

3

131

1.10 × 10-1

4

141

1.59 × 10-1

5

146

1.87 × 10-1

6

151

2.15 × 10-1

The vapour pressure of the test item calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4.Vapour Pressure and OECD Test Guideline 104 (2006) is shown in Table 2:

Table2:    Calculated vapour pressure values for 20, 25 and 50 °C

Temperature / °C

Vapour pressure / Pa

20

3.9 × 10-4

25

5.5 × 10-4

50

2.6 × 10-3
Conclusions:
The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006).
0.00039 Pa at 20 °C
0.00055 Pa at 25 °C
0.0026 Pa at 50 °C
Executive summary:

The vapour pressure of the test itemSTOCK1880was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4.Vapour PressureandOECD Test Guideline No. 104 (2006).

Temperature / °C

Vapour pressure / Pa

20

3.9 × 10-4

25

5.5 × 10-4

50

2.6 × 10-3

This study was GLP compliant and followed OECD Guideline 104 and Regulation EC No. 440/2008 Method A.4. The study was given a reliability rating of 1 (reliable without restrictions).

Description of key information

The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006).

0.00039 Pa at 20 °C

0.00055 Pa at 25 °C

0.0026 Pa at 50 °C

Key value for chemical safety assessment

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

Additional information

This study was GLP compliant and followed OECD Guideline 104 andRegulation EC No. 440/2008 Method A.4.The study was given a reliability rating of 1 (reliable without restrictions).