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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
November 2017 - April 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
version 2006
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
version 2009
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
signed 23 March 2017
Type of method:
effusion method: vapour pressure balance
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Remarks on result:
other: extrapolation
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: extrapolation
Transition / decomposition:
ambiguous
Remarks:
After assay at 90°C, a degradation of the test item was oserved. The major part of the test item became solid and blackened.

The mass of sample weighed for each assay was reported in the table below. The sample was placed in a Knudsen effusion cell. Then the cell was placed in the apparatus.

 Assay N°  T°C  Mass of the test item (mg)  Knudsen effusion cell aperture size (µm)  Taken into account or not
 1  100

12.23

279.9 

No 

 2

 95

12.23

279.9 

No

 3

 90

12.23

279.9 

No

 80

 11.54

 279.9

Yes 

 5  75  11.54  279.9  Yes
 6  70  11.54  279.9  Yes

After assay n° 3, an observation of the test item was made and a degradation of the test item was observerd. The major part of te test item became solid and blackened. The assays n° 1, 2 and 3 were not taken into account.

After the assays 4, 5 and 6, the test item remained stable.

Conclusions:
The vapour pressure of the test item is 2.1 x 10-7 Pa extrapolated at 20°C and is 6.3 x 10-7 extrapolated at 25°C.

Description of key information

The vapour pressure of the test item is 2.1 x 10-7 Pa extrapolated at 20°C and is 6.3 x 10 -7 extrapolated at 25°C according to experimental test carried out under OECD guideline 104 (effusion method: vapour pressure balance).

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test item is 2.1 x 10 -7 Pa extrapolated at 20°C and is 6.3 x 10-7 extrapolated at 25°C.