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EC number: 472-210-4 | CAS number: 41492-05-1
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:
- 20 OCT 2005 - 15 DEC 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- Council Directive 67/548/EEC Annex V
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- dynamic method
- Temp.:
- 25 °C
- Vapour pressure:
- 0.022 hPa
- Conclusions:
- The vapour pressure of the test item is calculated by extrapolation:
20 °C: 0.012 hPa
25 °C: 0.022 hPa
50 °C: 0.25 hPa - Executive summary:
The vapour pressure of the sample was tested according to EU Method A.4 and OECD Guideline 104 in a GLP study with the dynamic method.
The vapour pressure of the test item is calculated by extrapolation:
20 °C: 0.012 hPa
25 °C: 0.022 hPa
50 °C: 0.25 hPa
Reference
The vapour pressure was measured with the dynamic method in the temperature range of 90 °C to 240 °C. The measured vapour pressures at the corresponding temperatures are listed in the following table:
| Temperature [°C] | Vapour pressure [hPa] |
| 89.8 | 4.2 |
| 105.7 | 10.3 |
| 120.0 | 20.3 |
128.9 |
30.2 |
| 141.8 | 50.5 |
| 150.5 | 70.0 |
| 158.5 | 100.5 |
| 172.3 | 150.6 |
| 181.3 | 200.3 |
| 193.7 | 300.5 |
| 210.9 | 499.9 |
| 228.4 | 701.2 |
| 239.7 | 901.0 |
The figure (attached as background material) gives the vapour pressure (logarithmic scale) as a function of the inverse temperature (1/T, T in Kelvin). Only for better readability the temperature was reported in a centigrade scale. The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C, as shown.
T [°C] |
p [hPa] | p [Pa] |
| 20 | 1.2 x 10-2 | 1.24 |
| 25 | 2.2 x 10-2 | 2.21 |
| 50 | 2.5 x 10-1 | 25.2 |
Description of key information
The vapour pressure of the sample was tested according to EU Method A.4 and OECD Guideline 104 in a GLP study with the dynamic method.
The vapour pressure of the test item is calculated by extrapolation:
20 °C: 0.012 hPa
25 °C: 0.022 hPa
50 °C: 0.25 hPa
Key value for chemical safety assessment
- Vapour pressure:
- 0.022 hPa
- at the temperature of:
- 25 °C
Additional information
The values for 20, 25 and 50 °C are calculated, using the Antoine constants.
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