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EC number: 228-244-5 | CAS number: 6192-13-8
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:
- 15 November 2017 to 22 November 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2009
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- < 0.001 Pa
- Conclusions:
- Under the conditions of this study, the vapour pressure of the test material was considered to be lower than 10^-3 Pa at 160°C and as a consequence largely lower than 10^-3 Pa at 20°C.
- Executive summary:
The vapour pressure of the test material was investigated in accordance with the standardised guidelines 104 and EU Method A.4, under GLP conditions.
The sample was placed in an effusion cell with a known aperture size. This cell was placed in the sample pan of the micro-balance of the apparatus, a counterweight on the reference pan. The apparatus was pumped down, and the vacuum of the turbo molecular pump was controlled using transducers. After temperature equilibrium, the loss of weight of the sample versus time was recorded by the software, and experiments were repeated at different temperatures. For at least three temperatures, the linear part of the raw experimental data of the measurements was used for calculation of the vapour pressure by the analysis software. Then, these values of vapour pressure at different temperatures were used to plot a linear extrapolation of the vapour pressure.
No degradation of the test material was observed. The aspect of the test material remained stable after the assays. No reliable loss of mass was recorded during the assays. The temperature was not increased higher than 160°C.
Under the conditions of this study, the vapour pressure of the test material was considered to be lower than 10^-3 Pa at 160°C and as a consequence largely lower than 10^-3 Pa at 20°C. This value of 10^-3 Pa corresponds to the minimal limit of pressure determined by the apparatus.
Reference
No degradation of the test material was observed. The aspect of the test material remained stable after the assays.
No reliable loss of mass was recorded during the assays. The temperature was not increased higher than 160°C.The vapour pressure of the test material was considered to be lower than 10^-3 Pa at 160°C and as a consequence largely lower than 10^-3 Pa at 20°C.
This value of 10^-3 Pa corresponds to the minimal limit of pressure determined by the test apparatus.
Description of key information
Under the conditions of this study, the vapour pressure of the test material was considered to be lower than 10^-3 Pa at 160°C and as a consequence largely lower than 10^-3 Pa at 20°C.This value of 10^-3 Pa corresponds to the minimal limit of pressure determined by the apparatus.
Key value for chemical safety assessment
Additional information
The vapour pressure of the test material was investigated in accordance with the standardised guidelines 104 and EU Method A.4, under GLP conditions.
The sample was placed in an effusion cell with a known aperture size. This cell was placed in the sample pan of the micro-balance of the apparatus, a counterweight on the reference pan. The apparatus was pumped down, and the vacuum of the turbo molecular pump was controlled using transducers. After temperature equilibrium, the loss of weight of the sample versus time was recorded by the software, and experiments were repeated at different temperatures. For at least three temperatures, the linear part of the raw experimental data of the measurements was used for calculation of the vapour pressure by the analysis software. Then, these values of vapour pressure at different temperatures were used to plot a linear extrapolation of the vapour pressure.
No degradation of the test material was observed. The aspect of the test material remained stable after the assays. No reliable loss of mass was recorded during the assays. The temperature was not increased higher than 160°C.
Under the conditions of this study, the vapour pressure of the test material was considered to be lower than 10^-3 Pa at 160°C and as a consequence largely lower than 10^-3 Pa at 20°C. This value of 10^-3 Pa corresponds to the minimal limit of pressure determined by the apparatus.
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