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EC number: 204-605-2 | CAS number: 123-15-9
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
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:
- dynamic method
Test material
- Reference substance name:
- 2-methylvaleraldehyde
- EC Number:
- 204-605-2
- EC Name:
- 2-methylvaleraldehyde
- Cas Number:
- 123-15-9
- Molecular formula:
- C6H12O
- IUPAC Name:
- 2-methylpentanal
- Test material form:
- other: liquid
- Details on test material:
- Name of test material (as cited in study report): "2-Methylpentanal"
Analytical purity: 98-100%
Lot/batch No.: B902 from 2011-05-17
Storage condition of test material: Refrigerator, under nitrogen
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 19.3 hPa
- Remarks on result:
- other: calculated from the regression equation
- Temp.:
- 25 °C
- Vapour pressure:
- 25.5 hPa
- Remarks on result:
- other: calculated from the regression equation
- Temp.:
- 50 °C
- Vapour pressure:
- 88.4 hPa
- Remarks on result:
- other: calculated from the regression equation
Any other information on results incl. tables
Results:
The experimental results of the vapour pressure as a function of the temperature are compiled in the table below.
| Temperature [t/°C] |
Vapour Pressure [p/hPa] |
|
| Measurement | Calculation | |
| 20.62 | 19.94 | 19.957 |
| 27.93 | 29.92 | 29.870 |
| 37.93 | 49.87 | 49.971 |
| 44.88 | 69.86 | 69.840 |
| 52.68 | 99.82 | 99.642 |
| 69.31 | 199.7 | 199.39 |
| 79.95 | 299.7 | 298.49 |
| 94.93 | 499.6 | 502.99 |
| 105.36 | 699.7 | 703.11 |
| 117.02 | 1003.9 | 997.66 |
The vapour pressure as a function of the temperature may be expressed by the following regression equation:
ln(p/hPa) = 16.6675-3289.53/ (219.95 + t / °C)
The vapour pressure at 20 °C, 25 °C and 50 °C was calculated from this equation.
The test item is liquid in the temperature range of the measurements.
Temperature, t/°C |
Vapour pressure, p/hPa |
20 |
19.3 |
25 |
25.5 |
50 |
88.4 |
Applicant's summary and conclusion
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