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EC number: 809-986-4 | CAS number: 52585-16-7
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:
- 12 May - 25 May 2015
- 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:
- 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
Reference
Results
The sample was degassed under vacuum. The measurements started at the initial temperature and the temperature was increased stepwise.
Temperature [°C] |
Vapour pressure1) [Pa] |
30 |
0.0213 |
40 |
0.0674 |
50 |
0.4298 |
60 |
1.3477 |
70 |
1.0439* |
80 |
2.1448* |
90 |
0.6157* |
75 |
0.7573* |
55 |
0.1073* |
1)Mean value of triplicate measurements
* not used for test evaluation; partly strong fluctuations from the base line
Calculated pressure: 20 °C, 3.8E-03 Pa
The vapour pressure of the test item at 20 °C was calculated by mathematical extrapolation using the Antoine equation. It was determined to 3.8 x 10-3Pa≙3.8E-05 hPa (at 20 °C).
Antoine equation: |
A |
B |
C |
ln p [kPa] = A – B / (T [K] – C) |
30.7984 |
10952.96 |
40.00 |
log p [hPa] = A – B / (T [°C] + C) |
14.3756 |
4756.81 |
233.15 |
After the completion of the measurements, crystalline residues of the test item were found under the furnace lid. Enamelled parts were seen at the bottom of the apparatus. It was concluded that the test item melted during the measurement.
The vapour pressure of the test item was determined according to OECD guideline no. 104 [adopted on 23 March 2006] and EU test method A.4 [Council Regulation (EC) No 440/2008] with the vapour pressure balance. It was determined to be equal to 3.8E-05 hPa.
Description of key information
3.8E-05 hPa at 20 °C (OECD 104, vapour pressure balance)
Key value for chemical safety assessment
- Vapour pressure:
- 0 hPa
- at the temperature of:
- 20 °C
Additional information
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