Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 to 6 September 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
GLP compliance:
yes (incl. certificate)
Remarks:
Hess, Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
effusion method: vapour pressure balance
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Vapour pressure:
0 Pa
Transition / decomposition:
yes
Remarks:
endothermic effect (melting)
Transition temp.:
>= 210 - <= 230 °C
Transition / decomposition:
yes
Remarks:
exothermic effect (decomposition)
Transition temp.:
>= 240 - <= 300 °C

The vapour pressure was measured in the temperature range of 128 to 153 °C. The measured vapour pressure values together with the measured temperatures are listed in the following table.

 

Results of the Effusion method

No.

Temperature / °C

Vapour pressure / Pa

1

128

1.00E-03

2

133

1.22E-03

3

138

1.47E-03

4

143

1.78E-03

5

148

2.11E-03

6

153

2.49E-03

 

From the measured data points of the vapour pressure curve the constants A and B of the Antoine equation can be derived by regression.

 

Antoine equation:

 

Log10 p = A + (B/T)

 

A = 3.7814

B = -2719.53

 

 

The vapour pressure of the test item calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C is shown in the following table.

 

Extrapolated vapour pressure values for 20, 25 and 50 °C

Temperature / °C

Vapour pressure / Pa

20

3.2E-6

25

4.5E-6

50

2.3E-5

Description of key information

extrapolated vapour pressure:

3.2E-6 Pa at 20 °C

4.5E-6 Pa at 25 °C

2.3E-5 Pa at 50 °C

(OECD Guideline 104, effusion method: vapour pressure balance)

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

According to Regulation EC No. 440/2008 Method A.4, the vapour pressure values of the test item for the temperatures 20, 25 and 50 °C were calculated by extrapolation of the measured vapour pressure curve.