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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 June 02, 2012 to August 21, 2012
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
Remarks:
(OECD GLP)
Type of method:
effusion method: isothermal thermogravimetry
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Temp.:
20 °C
Vapour pressure:
0 mm Hg
Temp.:
25 °C
Vapour pressure:
0 Pa
Temp.:
25 °C
Vapour pressure:
0 mm Hg

The results of the isothermal TGA analysis for the test substance and the vapour pressure at 20°C and 25°C are given in Table1 and Table 2:

Table1: Results of the isothermal TGA analysis

Temperature
[°C]

Weight loss
[µg/min]

νT
[g/cm2/h]

logνT

logPT

PT
[Pa]

 

 

 

 

 

 

170

7.044

8.41´10-4

- 3.08

0.96

9.1

 

6.121

7.31´10-4

- 3.14

0.89

7.8

 

 

 

 

 

 

180

10.78

1.29´10-3

- 2.89

1.17

15

 

10.90

1.30´10-3

- 2.89

1.18

15

 

 

 

 

 

 

190

15.41

1.84´10-3

- 2.74

1.35

22

 

16.14

1.93´10-3

- 2.72

1.37

24

 

 

 

 

 

 

Table2: Vapour pressure of the test substance

Temperature
[°C]

logPT

PT
[Pa]

PT
[mm Hg]

 

 

 

 

20

-4.23

6.0´10-5

4.5´10-7

 

 

 

 

25

-3.97

1.1´10-4

8.0´10-7

 

 

 

 

 

Conclusions:
Under the conditions of the study, the vapour pressure of the test substance was determined to be 6.0x10-5 Pa (or 4.5x10-7 mmHg) and 1.1x10-4 Pa (or 8.0x10-7 mmHg) at 20°C and 25°C respectively.
Executive summary:

A study was conducted to determine the vapour pressure of the test substance using an isothermal thermogravimetric effusion method according to OECD Guideline 104, EU Method A.4 and US EPA Guideline 830.7950. Under the conditions of the study, the vapour pressure was determined to be 6.0x10-5 Pa (or 4.5x10-7 mmHg) and 1.1x10-4 Pa (or 8.0x10-7 mmHg) at 20°C and 25°C, respectively (Baltussen, 2017).

Description of key information

The vapour pressure was determined using the isothermal thermogravimetric effusion method according to OECD Guideline 104, EU Method A.4 and US EPA Guideline 830.7950 (Baltussen, 2017).

Key value for chemical safety assessment

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

Additional information