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EC number: 810-161-6 | CAS number: 1229654-66-3
Vapour pressure
Administrative data
Link to relevant study record(s)
- 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
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- GLP compliance:
- yes (incl. QA statement)
- 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
Reference
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.
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