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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:
- 30 March 2020 to 29 April 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of Inspection: 10-17 December 2019; Date of Signature on Certificate: 24 February 2020
- Type of method:
- effusion method: isothermal thermogravimetry
- Temp.:
- 25 °C
- Vapour pressure:
- 3.5 Pa
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 2.4 Pa
- Conclusions:
- The vapour pressure was determined to be 2.4 Pa and 20°C and 3.5 Pa at 25°C.
- Executive summary:
The isothermal thermogravimetric effusion method was applied for the determination of the vapour pressure of the test item.
The vapour pressure was determined to be 2.4 Pa at 20°C and 3.5 Pa at 25°C.
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 Table 1 and Table 2 below.
The equation of the vapour pressure regression curve was: log PT = -2653 ´ 1/T + 9.44 (r = 0.991, n = 8).
Table 1
Results of the Vapour pressure Isothermal TGA Analysis
Temperature |
Weight loss |
νT |
log νT |
log PT |
PT |
30 |
2.93250 |
3.50 x 10-4 |
-3.46 |
0.74 |
5.5 |
|
2.33038 |
2.78 x 10-4 |
-3.56 |
0.62 |
4.2 |
40 |
5.32807 |
6.36 x 10-4 |
-3.20 |
1.03 |
11 |
|
4.34471 |
5.19 x 10-4 |
-3.29 |
0.93 |
8.5 |
50 |
7.73515 |
9.23 x 10-4 |
-3.03 |
1.21 |
16 |
|
7.77351 |
9.28 x 10-4 |
-3.03 |
1.21 |
16 |
60 |
13.8481 |
1.65 x 10-3 |
-2.78 |
1.49 |
31 |
|
12.9799 |
1.55 x 10-3 |
-2.81 |
1.46 |
29 |
Table 2
Vapour Pressure of the Test Item
Temperature |
log PT |
PT |
PT |
20 |
0.39 |
2.4 |
1.8 ´ 10-2 |
25 |
0.54 |
3.5 |
2.6 ´ 10-2 |
Description of key information
2.4 Pa at 20°C; OECD 104; Jovic Madzarevic, Z. (2020)
Key value for chemical safety assessment
- Vapour pressure:
- 2.4 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure was also determined to be 3.5 Pa at 25°C.
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