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EC number: 810-766-5 | CAS number: 1802886-42-5
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 2016-02-24 to 2016-07-27
- 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:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- 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:
- 0.004 Pa
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0.006 Pa
- Conclusions:
- The vapour pressure of the test item was determined at six different temperatures (30, 40, 50 °C at the first test series and 30, 45, 60 and 75 °C at the second test series) following EU A.4 using the effusion method (weight loss). Vapour pressure was determined to be 4.03E-3 Pa at 20 °C and 6.12E-3 Pa at 25 °C, respectively.
- Executive summary:
The vapour pressure of test item was determined following OECD 104 and EU A.4 using the effusion method (weight loss). A first test series with shorter time intervals and temperatures of 30, 40 and 50 °C were conducted, but yielded no relevant mass loss. Therefore, the test was repeated with adapted test conditions. In the second test series with adapted conditions the vapour pressure was examined at four different temperatures (30, 45, 60 and 75 °C). Three temperatures could be evaluated as they showed 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 -1.0000. 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: 4.03E-3 Pa
Vapour pressure at 25 °C: 6.12E-3 Pa
Reference
The first test series and Experiment 1 of the second test series (nominal temperature 30 °C) showed no significant weight loss. Three experiments could be evaluated as they showed relevant and reproducible weight loss. All evaluated experiments showed good reproducibility, giving relative standard deviations of less than 25.3 % and very good correlation. Therefore, the result of the test can be considered valid.
Table 1 Vapour Pressures (Effusion Method)
Experiment |
T |
Mean P |
Stand. Dev. P |
RSD P |
No. |
K |
Pa |
Pa |
% |
2 |
318.2 |
2.85E-02 |
4.12E-03 |
14.5% |
3 |
333.2 |
8.07E-02 |
2.04E-02 |
25.3% |
4 |
348.2 |
2.05E-01 |
2.15E-02 |
10.5% |
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
Description of key information
The vapour pressure of the test item was determined at six different temperatures (30, 40, 50 °C at the first test series and 30, 45, 60 and 75 °C at the second test series) following EU A.4 using the effusion method (weight loss). Vapour pressure was determined to be 4.03E-3 Pa at 20 °C and 6.12E-3 Pa at 25 °C, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0.004 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of test item was determined following OECD 104 and EU A.4 using the effusion method (weight loss). A first test series with shorter time intervals and temperatures of 30, 40 and 50 °C were conducted, but yielded no relevant mass loss. Therefore, the test was repeated with adapted test conditions. In the second test series with adapted conditions the vapour pressure was examined at four different temperatures (30, 45, 60 and 75 °C). Three temperatures could be evaluated as they showed 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 -1.0000. 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: 4.03E-3 Pa
Vapour pressure at 25 °C: 6.12E-3 Pa
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