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EC number: 207-993-1 | CAS number: 504-53-0
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
Test material
- Reference substance name:
- Pentatriacontan-18-one
- EC Number:
- 207-993-1
- EC Name:
- Pentatriacontan-18-one
- Cas Number:
- 504-53-0
- Molecular formula:
- C35H70O
- IUPAC Name:
- pentatriacontan-18-one
- Test material form:
- solid
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Test no.:
- #4
- Temp.:
- 348.2 K
- Vapour pressure:
- ca. 0.003 Pa
- Test no.:
- #5
- Temp.:
- 363.2 K
- Vapour pressure:
- ca. 0.005 Pa
- Test no.:
- #6
- Temp.:
- 378.2 K
- Vapour pressure:
- ca. 0.008 Pa
- Test no.:
- #7
- Temp.:
- 393.2 K
- Vapour pressure:
- ca. 0.014 Pa
- Key result
- Test no.:
- #8
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: calculated from the regression equation
- Test no.:
- #8
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: calculated from the regression equation
Applicant's summary and conclusion
- Conclusions:
- For the test item Stearone, the following vapour pressures at 20°C and at 25°C were cal-culated from the regression equation:
Vapour pressure at 20°C: 1.58 * 10-04 Pa
Vapour pressure at 25°C: 2.12 * 10-04 Pa - Executive summary:
The vapour pressure of the test itemStearonewas determined at seven different temperatures (30, 45, 60, 75, 90, 105 and 120 °C) according to OECD 104 resp. EU A.4 using the effusion method (weight loss). Experiment 1-3 (nominal temperature 30, 45 and 60 °C) showed no reproducible weight loss. When visible contaminations, caused by explosive evaporation of the test item, were observed, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, these measurements were not used for calculations.
Four experiments could be evaluated as they showed relevant and reproducible weight loss. All evaluated experiments showed good reproducibility, giving relative standard deviations of less than 28 % (limit value from the guideline 30 %) and good correlation.
Therefore, the result of the test can be considered valid.
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