Registration Dossier
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EC number: 203-957-4 | CAS number: 112-31-2
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:
- 2012-04-16 to 2012-04-17
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: Etzweiler F, Senn E, Neuner-Jehle, Bunsen-Ges B, Phys Chem. 1984 88:578-583
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: Neuner-Jahle N, Etzweiler F. Perfumes: Art, Science and Technology; in Muller P, Lamparsky (eds) Elsevier Applied Science Publishers, London, 1991 153-212.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- gas saturation method
- Specific details on test material used for the study:
- - Names of test material (as cited in study report): Aldehyde C10 decyclic food grade
- Substance type: Colourless liquid
- Physical state: Liquid
- Impurities (identity and concentrations): No data
- Composition of test material, percentage of components:
- Isomers composition: No data
- Purity test date: No data
- Lot No: VE00152125
- Expiration date of the lot/batch: 2012-04-19
- Stability under test conditions: No data
- Storage condition of test material: No data - Temp.:
- 20 °C
- Vapour pressure:
- 8.2 Pa
- Transition / decomposition:
- no
- Conclusions:
- The vapour pressure of the test material was determined to be 8.2 Pa at 20 °C.
Reference
Headspace vapour concentrations of the test material as found after different equilibration times are exposed below:
| Equilibration times (h) | Headspace concentration (g.m-3) |
| 3 | 0.582 |
| 5 | 0.446 |
| 7 | 0.541 |
| Average | 0.523 |
The results were in agremeent within the estimated repeatability of the method as stated in the OECD 104 guideline for the method.
An additional peak was observed on the chromatograms of the test samples at a retention time of 11.557 mins, likely due to the oxidation of the test material under test conditions. Since the test material was present in a large excess on the bottom of the headspace vessel, this small loss due to oxidation was not regarded as critical. The validity of the study was not adversely affected.
Calculation of vapour pressure
The vapour pressure is calculated using the following equation:
p = W ×R × T ÷ ( V × M)
Where:
| p = | Vapour pressure in Pascal (Pa) |
| W = | Mass of the test substance in the aspirated volume (g) |
| V = | Aspirated volume (i.e. volume of the burette) (m3) |
| R = | Universal gas constant (8.314 J.mol-1.K-1) |
| T = | Test temperature (K) |
| M = | Molecular mass of the test substance (g.mol-1) |
Using this calculation gave the result of 8.2 Pa at 20 °C.
Description of key information
Vapour pressure 8.2 Pa at 20 °C (OECD 104)
Key value for chemical safety assessment
- Vapour pressure:
- 8.2 Pa
- at the temperature of:
- 20 °C
Additional information
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