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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:
24.02.-29.03.2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Temp.:
80 °C
Vapour pressure:
ca. 0 Pa
Temp.:
90 °C
Vapour pressure:
ca. 0 Pa
Key result
Temp.:
20 °C
Vapour pressure:
ca. 0 Pa
Remarks on result:
other: calculated
Key result
Temp.:
25 °C
Vapour pressure:
ca. 0 Pa
Remarks on result:
other: calculated
Transition / decomposition:
yes
Remarks:
decomposition
Transition temp.:
> 100 °C
Conclusions:
The vapour pressure of 2,2'-azobis(2-amidinopropane)dihydrochloride is 7.20E-6 Pa at 20 °C and 9.77E-6 Pa at 25 °C.
Executive summary:

The vapour pressure of 2,2'-azobis(2-amidinopropane)-dihydrochloride was determined following EU A.4 using the effusion method (weight loss).

Vapour pressure was examined at four different temperatures. Two temperatures could be evaluated as they showed significant and reproducible weight loss. For these temperatures, 1/t was plotted against log (P).

As only two temperatures could be evaluated, the graph 1/T vs. log (P) shows a straight line with a correlation coefficient of -1.0000.

For the test item 2,2'-azobis(2-amidinopropane)-dihydrochloride, the following vapour pressueres at 20 °C and at 25 °C were calculated from the regression equation:

Vapour pressure at 20 °C: 7.20 * 10-6 Pa

Vapour pressure at 25 °C: 9.77 * 10-6 Pa

Description of key information

The vapour pressure of 2,2'-azobis(2-amidinopropane) dihydrochloride is 7.20E-6 Pa at 20 °C and 9.77E-6 Pa at 25 °C.

Key value for chemical safety assessment

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

Additional information