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EC number: 443-100-3 | CAS number: 138679-81-9 PCH-3H.F
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)
- 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 hPa
- Conclusions:
- The vapour pressure of the test item is caluclated by extrapolation:
20 °C: 0.00012 hPa
25 °C: 0.00029 hPa
50 °C: 0.0098 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 caluclated by extrapolation:
20 °C: 0.00012 hPa
25 °C: 0.00029 hPa
50 °C: 0.0098 hPa
Reference
The vapour pressure was measured with the dynamic method in the temperature range of 117 °C to 236 °C. The measured vapour pressures at the corresponding temperatures are listed in the following table:
| Temperature [°C] | Vapour pressure [hPa] |
| 116.9 | 2.9 |
| 130.2 | 6.1 |
| 140.2 | 9.9 |
150.0 |
15.3 |
| 166.0 | 30.2 |
| 183.2 | 60.1 |
| 191.9 | 100.2 |
| 208.5 | 150.4 |
| 220.6 | 200.4 |
| 236.3 | 302.4 |
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 -4 | 1.2 x 10-2 |
| 25 | 2.9 x 10-4 | 2.9 x 10-2 |
| 50 | 9.8 x 10 -3 | 9.8 x 10-1 |
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 caluclated by extrapolation:
20 °C: 0.00012 hPa
25 °C: 0.00029 hPa
50 °C: 0.0098 hPa
Key value for chemical safety assessment
- Vapour pressure:
- 0
- 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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