Registration Dossier
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EC number: 800-300-9 | CAS number: 83447-96-5
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 004
- Report date:
- 2004
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
Test material
- Reference substance name:
- trans-1,4-bis(iodomethyl)cyclohexane
- Cas Number:
- 83447-96-5
- Molecular formula:
- C8H14I2
- IUPAC Name:
- trans-1,4-bis(iodomethyl)cyclohexane
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: The calculated vapour pressure values are extrapolated
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: The calculated vapour pressure values are extrapolated
- Temp.:
- 50 °C
- Vapour pressure:
- 0.002 hPa
- Remarks on result:
- other: The calculated vapour pressure values are extrapolated
Any other information on results incl. tables
The vapour pressure as a function of the inverse temperature showed an unusual course. In the temperature range 49 - 52 °C a sharp increase (step) was observed. This step could probably be explained by a physical transformation e.g. a change of the crystal modification. This course was verified by a second measurement. Due to this behaviour two regressions for different temperature ranges were performed.
The vapour pressure values for 20 and 25 °C were calculated, using the Antoine constants A, Band C of the regression for measured temperatures < 49°C. The vapour pressure value for 50 °C was calculated, using the Antoine constants A, Band C of the regression for measured temperatures > 52°C.
Applicant's summary and conclusion
- Conclusions:
- The calculated vapour pressure values are extrapolated:
P (20 °C) = 2.5 * 10 -6 hPa
p (25 °C) = 5.0 * 10 -6 hPa
p (50 °C) = 2.0 * 10 -3 hPa
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