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EC number: 924-669-1 | 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 2016-04-11 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:
- adopted 23. Mar. 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- Council Regulation (EC) No 761/2009 of 24 August 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- dated August 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 Pa
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0.001 Pa
- Conclusions:
- The vapour pressure of the test item was determined at four different temperatures (30, 45, 60 and 75 °C) following EU A.4 using the effusion method (weight loss). Vapour pressure was calculated to be 3.93E-4 Pa at 20 °C and 5.9E-4 Pa at 25 °C, respectively.
- 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 (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 - 0.9977. 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: 3.93E-4 Pa; Vapour pressure at 25 °C: 5.90E-4 Pa
Reference
Table 1Vapour Pressures (Effusion Method)
Experiment |
T |
Mean P |
Stand. Dev. P |
RSD P |
No. |
K |
Pa |
Pa |
% |
1 |
303.2 |
8.43E-04 |
1.05E-04 |
12.4% |
2 |
318.2 |
2.88E-03 |
2.32E-04 |
8.0% |
3 |
333.2 |
6.94E-03 |
1.30E-03 |
18.7% |
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 four different temperatures (30, 45, 60 and 75 °C) following EU A.4 using the effusion method (weight loss). Vapour pressure was calculated to be 3.93E-4 Pa at 20 °C and 5.9E-4 Pa at 25 °C, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0 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 (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 - 0.9977. 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: 3.93E-4 Pa; Vapour pressure at 25 °C: 5.90E-4 Pa
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