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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 21st, 2016.
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:
yes (incl. certificate)
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

Vapour pressure of the test item at 20ºC and 25ºC was calculated on the basis of equation log (p) = f (1/ t) = a-b/(t+273.15) where: p – vapour pressure in Pa, t – temperature in ºC, obtained for four measurement points: 168.9ºC, 175.2ºC, 181.7ºC and 188.3ºC.

Table 1. Summary of vapour pressure determination results.

Vapour pressure at 20ºC

Vapour pressure at 25ºC

4.51·10-16Pa

2.28·10-15Pa

 

Conclusions:
The vapour pressure of the test item at 20ºC is 4.51E-16 Pa, and the vapour pressure of the test item at 25ºC is 2.28E-15 Pa.
Executive summary:

The study of the vapour pressure using effusion method was performed in accordance with the guideline OECD 104/ EU Method A.4, under GLP conditions. The vapour pressure of the test item was found to be 4.51E-16 Pa at 20ºC, and 2.28E-15 Pa at 25ºC.


Description of key information

Method according to OECD 104/ EU Method A.4, GLP study. The vapour pressure of the test item at 20ºC is 4.51E-16 Pa, and the vapour pressure of the test item at 25ºC is 2.28E-15 Pa.

Key value for chemical safety assessment

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

Additional information

The study of the vapour pressure using effusion method was performed in accordance with the method EU A4 - Knudsen cell (GLP study). The vapour pressure of the test item at 20ºC is 4.51E-16 Pa, and the vapour pressure of the test item at 25ºC is 2.28E-15 Pa.