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EC number: 291-826-2 | CAS number: 90480-88-9
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:
- 14 Aug 2019 to 18 Sep 2019
- 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
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- EC Guideline A.4. Vapour Pressure. March 04, 2016.
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- OECD Guideline104. Vapour Pressure. March 23, 2006.
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
- Specific details on test material used for the study:
- No further details sepcified in the study report.
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 34 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.25 mm Hg
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 22 Pa
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.17 mm Hg
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of ISO-MIX.
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 2.2 x 101 1.7 x 10-1 3.4 x 101 2.5 x 10-1 - Executive summary:
The objective of the study was to determine the following physico-chemical properties for ISO-MIX:
Appearance
Melting and boiling temperature
Density
Vapour pressure
Flash-point
Auto-ignition temperature
The design of this study is based on the following guidelines:
Vapour Pressure
EC Guideline A.4. Vapour Pressure. March 04, 2016.
OECD Guideline104. Vapour Pressure. March 23, 2006.
The vapour pressure of the test item (PT) was determined by the isothermal thermogravimetric effusion method. The method is validated in the range 10-8 - 103 Pa using a set of five reference substances with known vapour pressures.
An amount of 14.7 or 11.6 mg of the test item was applied to the surface of a roughened glass
plate as a homogeneous layer.
The isothermal TGA effusion method was applied for the determination of the vapour pressure of ISO-MIX.
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
2.2 x 101
1.7 x 10-1
3.4 x 101
2.5 x 10-1
Reference
Results of the Vapour pressure Isothermal TGA Analysis
Temperature [°C] |
Weight loss [μg/min] |
vT [g/cm2/h] |
Log vT |
Log PT |
PT [Pa] |
30
35
40
45 |
23.0058 19.9238
31.9541 29.3742
45.3575 41.8816
61.7816 57.3725
|
2.75 x 10-3 2.38 x 10-3
3.81 x 10-3 3.51 x 10-3
5.41 x 10-3 5.00 x 10-3
7.37 x 10-3 6.85 x 10-3 |
-2.56 -2.62
-2.42 -2.46
-2.27 -2.30
-2.13 -2.16 |
1.74 1.67
1.90 1.86
2.07 2.03
2.22 2.19 |
5.5 x 101 4.7 x 101
8.0 x 101 7.3 x 101
1.2 x 102 1.1 x 102
1.7 x 102 1.5 x 102 |
Vapour Pressure of the Test item
Temperature [°C] |
Log PT |
PT [Pa] |
PT [mm Hg] |
20
25 |
1.35
1.53 |
2.2 x 101
3.4 x 101 |
1.7 x 10-1
2.5 x 10-1 |
Description of key information
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 |
2.2 x 101 |
1.7 x 10-1 |
3.4 x 101 |
2.5 x 10-1 |
Key value for chemical safety assessment
- Vapour pressure:
- 34 Pa
- at the temperature of:
- 25 °C
Additional information
The isothermal TGA effusion method was applied for the determination of the vapour pressure of ISO-MIX.
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 |
2.2 x 101 |
1.7 x 10-1 |
3.4 x 101 |
2.5 x 10-1 |
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