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EC number: 291-443-0 | CAS number: 90411-66-8
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:
- 9 Jan 2018 - 16 Feb 2018
- 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:
- 11 July 2006
- Deviations:
- no
- GLP compliance:
- no
- Other quality assurance:
- other: ISO 9001: 2015
- Type of method:
- effusion method: isothermal thermogravimetry
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.003 Pa
- Conclusions:
- The vapour pressure of the test substance was determined to be 0.0026 Pa at 20 °C, under the conditions of the test.
- Executive summary:
In this guideline (OECD 104) study, the vapour pressure of the test substance was determined to be 0.0026 Pa at 20 °C.
Reference
+Results
A representative weight loss curve of the test item is shown in Figure 6. The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°C and 25°C are given in Table 3 and Table 4.
The vapour pressure regression curve
of the log PT of the test item as function of the reciprocal
temperatures is shown in Figure 7. The equation of the curve was:
log PT= -5003´1/T + 14.5 (r = 0.9998, n = 8).
Table 3
Results of the Vapour pressure Isothermal TGA Analysis
Temperature |
Weight loss |
νT |
logνT |
logPT |
PT |
70 |
0.696581 |
8.31´10-5 |
-4.08 |
-0.09 |
0.82 |
|
0.684083 |
8.17´10-5 |
-4.09 |
-0.10 |
0.80 |
80 |
1.45437 |
1.74´10-4 |
-3.76 |
0.32 |
2.1 |
|
1.43183 |
1.71´10-4 |
-3.77 |
0.31 |
2.1 |
90 |
2.94830 |
3.52´10-4 |
-3.45 |
0.72 |
5.2 |
|
2.89863 |
3.46´10-4 |
-3.46 |
0.71 |
5.1 |
100 |
5.77648 |
6.90´10-4 |
-3.16 |
1.09 |
12 |
|
5.58010 |
6.66´10-4 |
-3.18 |
1.07 |
12 |
Table 4
Vapour Pressure of the Test Item
Temperature |
logPT |
PT |
PT |
20 |
-2.58 |
2.6´10-3 |
2.0´10-5 |
25 |
-2.29 |
5.1´10-3 |
3.8´10-5 |
Conclusion
The isothermal TGA effusion method was applied for the determination of the vapour pressure ofHetester FAO.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
|
20°C |
25°C |
||
[Pa] |
[mm Hg] |
[Pa] |
[mm Hg] |
|
Test item |
2.6´10-3 |
2.0´10-5 |
5.1´10-3 |
3.8´10-5 |
Description of key information
Study conducted to recognised testing guidelines.
Key value for chemical safety assessment
- Vapour pressure:
- 0.003 Pa
- at the temperature of:
- 20 °C
Additional information
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