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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:
October 10th, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
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

Table 1. Determined vapour pressure for the test item.

Sample

Vapour pressure at 20 ºC

Vapour pressure at 25 ºC

Test item

 7.79 ·10-7 Pa

2.45 ·10-6 Pa

Conclusions:
The vapour pressure of the test item is 7.79E-7 Pa at 20ºC and 2.45E-6 Pa at 25ºC
Executive summary:

The vapour pressure of the test item using the effusion method with e Knudsen Cell was determined according to OECD guideline 104 and EU Method A.4, under GLP conditions. The method is based on the determination of the mass of test substance flowing out per unit of time of a Knudsen cell in the form of vapour, through a micro-orifice under ultra-vacuum conditions. The vapour pressure was determined to be 7.79E-7 Pa at 20ºC and 2.45E-6 Pa at 25ºC.

Description of key information

Key study. Method according to OECD 104 / EU method A.4 (Knudsen cell), GLP study. The vapour pressure of the test item is 7.79E-7 Pa at 20ºC and 2.45E-6 Pa at 25ºC.

Key value for chemical safety assessment

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

Additional information