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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:
June 12th, 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:
yes (incl. certificate)
Type of method:
effusion method: Knudsen cell
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0.113 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.21 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 five measurement points: 26.7ºC, 28.9ºC, 32.5ºC, 35.9ºC and 39.0ºC.

- At 20ºC the determined vapour pressure is 1.13·10-1 Pa,

- At 25ºC the determined vapour pressure is 2.10·10-1 Pa.

Conclusions:
The vapour pressure of the test item is 0.113 Pa at 20ºC and 0.210 Pa at 25ºC.

Executive summary:

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 is 0.113 Pa at 20ºC and 0.210 Pa at 25ºC.

Description of key information

Key study. Method according to OECD 104 and EU Method A.4 (Knudsen cell), GLP study. The vapour pressure of the test item is 0.113 Pa at 20ºC and 0.210 Pa at 25ºC.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test item was determined by the effusion method (Knudsen cell), according to OECD 104 and EU A.4 method (GLP study).

The vapour pressure of the test item is 0.113 Pa at 20ºC and 0.210 Pa at 25ºC.