Registration Dossier
Registration Dossier
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EC number: 807-276-9 | CAS number: 1421695-64-8
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:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guidelineopen allclose all
- 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
- GLP compliance:
- yes
- Type of method:
- isoteniscope
Test material
- Details on test material:
- - Purity: > 96%
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0.21 kPa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.28 kPa
Transition / decomposition
- Transition / decomposition:
- no
Applicant's summary and conclusion
- Conclusions:
- Vapour Pressure was determined to be 0.21 kPa and 0.28 kPa at 20 and 25°C, respectively.
- Executive summary:
Vapour pressure of the test substance was determined according to OECD Guideline 104. The measuring principle is equivalent to ASTM D2879-86 (isoteniscope principle) but with only 1 mL sample volume. The instrument consisted of a vacuum-sealed measuring chamber of an overall volume of 5 mL. A piezoresistive pressure transducer was integrated in the vacuum chamber. A vacuum valve was installed in the chamber for automatic outgassing of the sample. Cooling and heating was performed with a Peltier element. The vapour pressure as a function of temperature was registered in 20-100°C range in 5°C steps.
The vapour pressure curve (log p versus 1/T) was plotted. A line was fitted to the measured data (above 0.5 kPa) applying the least squares method with the help of Excel for Windows software. Based on the simplified Clausius-Clapeyron equation a regression line was fitted on the measured data and the vapour pressure was extrapolated for 20 and 25°C.
The vapour pressure was 0.21 kPa at 20°C and 0.28 kPa at 25°C.
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