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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:
January 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2008
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: Knudsen cell
Key result
Test no.:
#1
Temp.:
30 °C
Vapour pressure:
>= 6.13 - < 9.03 Pa
Key result
Test no.:
#2
Temp.:
40 °C
Vapour pressure:
>= 10.3 - <= 24 Pa
Key result
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
>= 40.8 - <= 52.6 Pa
Key result
Vapour pressure:
46.3 Pa
Conclusions:
For the test substance of Dimethyl-2,2'-Azobis(isobutyrat) the following vapour pressures were calculated from the regression equation:
Vapour pressure at 20 °C: 2.85 Pa
Vapour pressure at 25 °C: 4.71 Pa

Description of key information

The vapor pressure is determined in an EU A.4 study showing a result of 2.85 Pa.

Key value for chemical safety assessment

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

Additional information

For the test substance of Dimethyl-2,2'-Azobis(isobutyrat), the following vapour pressures were calculated from the regression equation:

Vapour pressure at 20 °C: 2.85 Pa

Vapour pressure at 25 °C: 4.71 Pa

Vapour pressure at 50 °C: 46.3 Pa

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