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EC number: 251-995-5 | CAS number: 34396-03-7
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:
- 10 Jul 2015 to 13 Jul 2015
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- no
- Type of method:
- other: Effusion method / Knudsen cell
- Temp.:
- 20 °C
- Vapour pressure:
- 0.186 hPa
- Temp.:
- 30 °C
- Vapour pressure:
- 0.463 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 1.634 hPa
- Conclusions:
- Vapour pressure values of 0.2 hPa at 20°C and 1.7 hPa at 50°C were determined in a reliable study conducted according to an appropriate test protocol. It was not compliant with GLP.
- Endpoint:
- vapour pressure
- Type of information:
- (Q)SAR
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
- Justification for type of information:
- QSAR prediction
- Principles of method if other than guideline:
- The result was obtained using an appropriate QSAR method (see attached QMRF and QPRF for details).
- Temp.:
- 25 °C
- Vapour pressure:
- 8.6 Pa
- Conclusions:
- A vapour pressure value of 8.6 Pa at 25°C has been determined for the substance using an appropriate estimation method. The result is considered reliable.
Referenceopen allclose all
Results
Results from calculation using loss of mass
Temperature [°C] |
Vapour pressure [hPa] |
20 |
0.18605 |
30 |
0.462615 |
50 |
1.633936 |
Calculation of the Reliance log p to 1/T
Formula of regression: log p [hPa] = -2943.25 1/T [1/K] + 9.33511
Temperature [°C] |
log p [hPa] |
1/T [K-1] |
20 |
-0.73014 |
0.003411 |
30 |
-0.33478 |
0.003299 |
50 |
0.21324 |
0.003095 |
Results from calculation using formula of regression
Temperature |
Estimated vapour pressure* |
20 °C |
0.2 hPa |
50 °C |
1.7 hPa |
Description of key information
0.2 hPa at 20°C (OECD 104, effusion method, Knudsen cell)
Key value for chemical safety assessment
- Vapour pressure:
- 0.2 hPa
- at the temperature of:
- 25 °C
Additional information
The key study is supported by a predicted vapour pressure of 0.086 hPa at 25°C determined using a validated QSAR method.
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