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EC number: 942-252-2 | 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:
- 2017-07-10 / 2018-03-26
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
- Transition / decomposition:
- no
- Conclusions:
- The vapour pressure of the test item was 0.000042 hPa at 20°C (293K) and 0.000065 hPa at 25°C (298K).
- Executive summary:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of the test item according to OECD Guideline 104 and EU Method A.4. The vapour pressure of the test item was 0.000042 hPa at 20°C (293K) and 0.000065 hPa at 25°C (298K).
Reference
The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°C and 25°C are given in the tables below. The vapour pressure regression curve of the log PT of the test item as function of the reciprocal temperatures was: log PT = -3340 × 1/T + 9.01 (r = 0.994, n = 8).
Results of the Vapour pressure Isothermal TGA Analysis
Temperature |
Weight loss |
νT |
logνT |
logPT |
PT |
100 |
0.871920 |
1.04 x 10-4 |
-3.98 |
0.04 |
1.1 |
|
0.864904 |
1.03 x 10-4 |
-3.99 |
0.03 |
1.1 |
110 |
1.44376 |
1.72 x 10-4 |
-3.76 |
0.32 |
2.1 |
|
1.49897 |
1.79 x 10-4 |
-3.75 |
0.34 |
2.2 |
120 |
2.08916 |
2.49 x 10-4 |
-3.60 |
0.52 |
3.3 |
|
2.17778 |
2.60 x 10-4 |
-3.59 |
0.55 |
3.5 |
130 |
2.85610 |
3.41 x 10-4 |
-3.47 |
0.70 |
5.0 |
|
2.93436 |
3.50 x 10-4 |
-3.46 |
0.71 |
5.2 |
Vapour Pressure of the Test Item
Temperature |
logPT |
PT |
PT |
20 |
-2.38 |
4.2 x 10-3 |
3.1 x 10-5 |
25 |
-2.19 |
6.5 x 10-3 |
4.9 x 10-5 |
Description of key information
The isothermal TGA effusion method was applied for the determination of the vapour pressure of the test item according to OECD Guideline 104 and EU Method A.4. The vapour pressure of the test item was 0.000042 hPa at 20°C (293K) and 0.000065 hPa at 25°C (298K).
Key value for chemical safety assessment
- Vapour pressure:
- 0 hPa
- at the temperature of:
- 25 °C
Additional information
One reliable experimental study is available and is selected as key study (Charles River, 2018). It was performed according to OECD Guideline 104 and EU Method A.4, and under GLP conditions.
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