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EC number: 821-762-8 | CAS number: 4563-56-8
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:
- 02 Jun - 03 Jun 2015
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- Final result reported is based on measurement at 50 °C.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- adopted in 2006
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- adopted in 2008
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Ministerium für Arbeit, Integration und Soziales des Landes Nordrhein-Westfalen, Düsseldorf, Germany
- Type of method:
- effusion method: vapour pressure balance
- Specific details on test material used for the study:
- Storage conditions: at room temperature; tightly closed; dry
- Temp.:
- 20 °C
- Vapour pressure:
- < 0 hPa
- Remarks on result:
- other: Final result based on measurement at 50 °C is < 4E-04 hPa
Reference
Results
Table 2 – Measurement results
Temperature [°C] |
Vapour pressure [Pa]’ |
50 |
0.0382 |
60 |
1.1624* |
70 |
0.1674 |
80 |
0.2108 |
90 |
0.1461* |
100 |
0.1305* |
110 |
0.1332* |
60 |
-** |
80 |
0.1254** |
’mean value of triplicate measurements
*not used for test evaluation, strongly fluctuating vapour pressure at
constant temperatures
**not used for test evaluation, low-temperature readings during
cooling-down process
Calculated pressure at 20 °C: 4.3E-03 Pa
After measurement completion, the test item inside the
furnace looked unchanged. Residues of the test item were found under the
lid. It is possible that due to these residues congestions of the
apertures during the measurements occurred, leading to wring test
results, especially at higher temperatures.
Therefore, the result measured at 50 °C was taken as the basis for the test evaluation instead of the value resulting from the mathematical extrapolation (Antoine equation). This value must be regarded as a maximum value, the real value is probably lower.
Conclusion: Vapour pressure (20 °C): < 4E-04 hPa
Description of key information
< 4.0E-02 Pa at 20 °C (OECD 104, based on measurement at 50 °C)
Key value for chemical safety assessment
- Vapour pressure:
- 0.04 Pa
- at the temperature of:
- 50 °C
Additional information
4.0E-02 Pa at 20 °C (OECD 104, calculated by mathematical extrapolation using Antonie equation). However due to the residues congestions of the apertues during the measurements occurred, the calculated value is not reliable. Therefore the test result measured at 50 °C was taken as a maximum value for the vapour pressure of test substance at 20 °C.
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