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EC number: 947-984-6 | 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
- 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
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: PX708164
- Expiration date of the lot/batch: 31 March 2018
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature container flushed with nitrogen - Key result
- Temp.:
- ca. 20 °C
- Vapour pressure:
- ca. 0.001 Pa
- Remarks on result:
- other: based on the non-volatile part of the test item
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 0.001 Pa
- Remarks on result:
- other: based on the non-volatile part of the test item
- Conclusions:
- The vapour pressure of the non-volatile part of the test item at 20°C is 7.4E-4 Pa.
- Executive summary:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Setalux 7002 BX-55.
The vapour pressure of the volatile part 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
< 2.3´103
< 18
< 3.2´103
< 24
The vapour pressure of the non-volatile part 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
7.4´10-4
5.6´10-6
1.1´10-3
8.2´10-6
Reference
Volatile part of the Test Item
Weight loss observed from the start of the study was due to evaporation of solvent. A representative weight loss curve of volatile part of the test item is shown in Figure 4. A non-linear weight loss was observed and the results within this range were therefore not reliable for the determination of the vapour pressure (detailed calculations archived in the raw data).
The weight loss of the volatile part of the test item at 30°C and 40°C was lower than the weight loss of the reference substance at the same temperatures. According to this the vapour pressure of the volatile part of the test item was determined to be lower than that of water. A representative weight loss curve of wateris shown in Figure 5.
The results of the vapour pressure for the test item at 20°Cand 25°Care given in Table 3.
Table 3 Vapour pressure of the volatile part of the Test Item
|
20°C |
25°C |
||
|
[Pa] |
[mm Hg] |
[Pa] |
[mm Hg] |
Test item |
< 2.3´103 |
< 18 |
< 3.2´103 |
< 24 |
Non-volatile part of the Test Item
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 4 and Table 5.
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= -2951´1/T + 6.94 (r = 0.991, n = 6).
Table 4 Results of the Vapour pressure Isothermal TGA Analysis
Temperature [°C] |
Weight loss [µg/min] |
νT [g/cm2/h] |
log νT |
log PT |
PT [Pa] |
170 |
1.36139 |
1.63´10-4 |
-3.79 |
0.29 |
1.9 |
|
1.34931 |
1.61´10-4 |
-3.79 |
0.28 |
1.9 |
180 |
1.68835 |
2.02´10-4 |
-3.70 |
0.41 |
2.5 |
|
1.69970 |
2.03´10-4 |
-3.69 |
0.41 |
2.6 |
190 |
2.35157 |
2.81´10-4 |
-3.55 |
0.59 |
3.9 |
|
2.20078 |
2.63´10-4 |
-3.58 |
0.55 |
3.6 |
Table 5
Vapour Pressure of the non-volatile part of the Test Item
Temperature [°C] |
log PT |
PT [Pa] |
PT [mm Hg] |
20 |
-3.13 |
7.4´10-4 |
5.6´10-6 |
25 |
-2.96 |
1.1´10-3 |
8.2´10-6 |
Description of key information
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Setalux 7002 BX-55.
The vapour pressure of the volatile part of the test item at 20°C (293K) is <2.3E3 Pa, the vapour pressure of the non-volatile part of the test item at 20°C (293K) is 7.4E-4 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 0.007 Pa
- at the temperature of:
- 20 °C
Additional information
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