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EC number: 915-372-8 | CAS number: -
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:
- from 2016-02-08 to 2016-05-13
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: Source of correction constants: E.D. Cater, Ch.2A, Physicochemical Measurements in Metal Research, Part 1, R.A. Rapp, Ed., John Wiley, New York, 1970
- Version / remarks:
- 1970
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0.016 Pa
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0.022 Pa
- Conclusions:
- Vapour pressure of the test item was calculated to be 0.0159 Pa at 20 °C and 0.0216 Pa at 25 °C, respectively, applying the effusion cell method.
- Executive summary:
The vapour pressure of the test item was determined following OECD 104 and EU A.4 using the effusion method (weight loss). Vapour pressure was examined at four different temperatures. Three temperatures could be evaluated as they showed relevant and reproducible weight loss. For these temperatures, 1/T was plotted against log (P). The graph 1/T vs. log (P) showed a straight line with a correlation coefficient of - 0.9938. For the test item the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C: 1.59E-2 Pa
Vapour pressure at 25 °C: 2.16E-2 Pa
Reference
Table 1Vapour Pressures (Effusion Method)
Experiment |
T |
Mean P |
Stand. Dev. P |
RSD P |
No. |
K |
Pa |
Pa |
% |
2 |
318.2 |
6.99E-02 |
4.36E-03 |
6.2% |
3 |
333.2 |
1.30E-01 |
2.32E-02 |
17.9% |
4 |
348.2 |
2.99E-01 |
5.24E-02 |
17.5% |
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
Description of key information
Vapour pressure of the test item was calculated to be 0.0159 Pa at 20 °C and 0.0216 Pa at 25 °C, respectively, applying the effusion cell method.
Key value for chemical safety assessment
- Vapour pressure:
- 0.016 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test item was determined following OECD 104 and EU A.4 using the effusion method (weight loss). Vapour pressure was examined at four different temperatures. Three temperatures could be evaluated as they showed relevant and reproducible weight loss. For these temperatures, 1/T was plotted against log (P). The graph 1/T vs. log (P) showed a straight line with a correlation coefficient of - 0.9938. For the test item the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C: 1.59E-2 Pa
Vapour pressure at 25 °C: 2.16E-2 Pa
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