Registration Dossier
Registration Dossier
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EC number: 281-689-7 | CAS number: 84012-44-2 Extractives and their physically modified derivatives such as tinctures, concretes, absolutes, essential oils, oleoresins, terpenes, terpene-free fractions, distillates, residues, etc., obtained from Triticum aestivum, Gramineae.
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 14 February 2018 to 14 March 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 11 July 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- Wheat, ext.
- EC Number:
- 281-689-7
- EC Name:
- Wheat, ext.
- Cas Number:
- 84012-44-2
- Molecular formula:
- UVCB, not applicable
- IUPAC Name:
- Wheat, ext.
- Test material form:
- liquid
- Details on test material:
- Appearance: Straw to yellow syrup
Purity/Composition: Not indicated
Test item storage: At room temperature
Additional information
Test Facility test item number: 209099/A
Purity/Composition correction factor: No correction factor required
Test item handling: No specific handling conditions required
1
- Specific details on test material used for the study:
- Appearance: Straw to yellow syrup
Purity/Composition: Not indicated
Test item storage: At room temperature
Additional information
Test Facility test item number: 209099/A
Purity/Composition correction factor: No correction factor required
Test item handling: No specific handling conditions required
Results and discussion
Vapour pressureopen allclose all
- Key result
- Test no.:
- #1
- Temp.:
- ca. 293 K
- Vapour pressure:
- ca. 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- ca. 298 K
- Vapour pressure:
- ca. 0 Pa
Any other information on results incl. tables
Representative weight loss curves of the test item are shown in the attached figure 4.
The vapour pressure regression curve constructed using the data of Experiment 1 and Experiment 2 had a coefficient of correlation of <0.99.
Therefore, it was decided to perform a third experiment and to calculate the coefficient of correlation for the Experiment 1/Experiment 2/Experiment 3, Experiment 1/Experiment 2, Experiment 1/Experiment 3 and Experiment 2/Experiment 3. Coefficient of correlation was >0.99 for the Experiment 2/Experiment 3. Based on this, the results from Experiment 1 were excluded.
The results of the isothermal TGA analysis for the test item are given inTable 3.
The vapour pressure at 20°Cand 25°Ccalculated using the curve obtained with data of Experiment 2/Experiment 3 is given inTable 4.
The plot of the log PT of the test item as function of the reciprocal temperatures is shown inFigure 5 (attached). The equation of the curve was: log PT = -5505´1/T + 13.47 (r = 0.996, n = 8).
Results of the Vapour pressure Isothermal TGA Analysis
Experiment |
Temperature |
Weight loss |
νT |
logνT |
logPT |
PT |
|
|
|
|
|
|
|
11 |
130 |
0.720525 |
8.60´10-5 |
-4.07 |
-0.07 |
0.86 |
|
140 |
1.46824 |
1.75´10-4 |
-3.76 |
-0.33 |
2.1 |
|
150 |
2.16385 |
2.58´10-4 |
-3.59 |
-0.54 |
3.5 |
|
160 |
3.91086 |
4.67´10-4 |
-3.33 |
-0.87 |
7.5 |
|
|
|
|
|
|
|
2 |
130 |
0.635023 |
7.58´10-5 |
-4.12 |
-0.14 |
0.73 |
|
140 |
0.941651 |
1.12´10-4 |
-3.95 |
0.08 |
1.2 |
|
150 |
1.79553 |
2.14´10-4 |
-3.67 |
0.44 |
2.8 |
|
160 |
3.26571 |
3.90´10-4 |
-3.41 |
0.77 |
5.9 |
|
|
|
|
|
|
|
3 |
130 |
0.588752 |
7.03´10-5 |
-4.15 |
-0.18 |
0.66 |
|
140 |
1.04732 |
1.25´10-4 |
-3.90 |
0.14 |
1.4 |
|
150 |
1.86634 |
2.23´10-4 |
-3.65 |
0.46 |
2.9 |
|
160 |
3.35298 |
4.00´10-4 |
-3.40 |
0.79 |
6.1 |
|
|
|
|
|
|
|
1Experiment 1 was not used in calculation.
Vapour Pressure of the Test Item
Temperature |
logPT |
PT |
PT |
20 |
-5.31 |
4.9´10-6 |
3.7´10-8 |
25 |
-4.99 |
1.0´10-5 |
7.6´10-8 |
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the test substance was determined to be 0.0000049 Pa at 293 K, under the conditions of the test.
The vapour pressure of the test substance was determined to be 0.00001 Pa at 298 K, under the conditions of the test. - Executive summary:
In this guideline (OECD 104) study, [conducted with GLP certification]:
The vapour pressure of the test substance was determined to be 0.0000049 Pa at 293 K, under the conditions of the test.
The vapour pressure of the test substance was determined to be 0.00001 Pa at 298 K, under the conditions of the test.
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