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EC number: 239-743-2 | CAS number: 15667-63-7
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:
- 2008-05-28
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: OECD 113
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- dynamic method
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.2 hPa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.34 hPa
- Key result
- Temp.:
- 50 °C
- Vapour pressure:
- 3.18 hPa
- Conclusions:
- The vapour pressure of the test item was determined to be 0.2 hPa at 20 °C according to EU A.4
Reference
Thermal Stability:
The DSC-measurement in a closed glass crucible showed an exothermal decompositon in the temperature range of 230 - 365 °C with an energy of 985 J/g.
Vapour presseure (dynamic method):
The vapour pressure was measured with the dynamic method in the temperature range of 66 °C to 168 °C. The measured vapour pressure at the corresponding temperatures are listed in the following table:
| Temperature / °C | Vapour pressure / hPa |
| 72.5 | 15.1 |
| 95.25 | 50.6 |
| 111.58 | 100.8 |
| 128.94 | 200.1 |
| 157.42 | 500.6 |
| 167.75 | 684.6 |
| 162.89 | 599.9 |
| 140.25 | 300.1 |
| 121.51 | 150.5 |
| 84.62 | 29.5 |
| 66.3 | 9.6 |
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as shown:
Parameters of the Antoine equation (log (p/hPa) = A+B/(C+T[°C])
A= 6.232749
B = -985.60
C= 121.99
The resuslts for the vapour pressures are:
| T / °C | p/hPa | p/Pa |
| 20 | 0.2 | 0.20 |
| 25 | 0.34 | 0.34 |
| 50 | 3.18 | 318 |
Description of key information
0.34 hPa at 25 °C
Key value for chemical safety assessment
- Vapour pressure:
- 0.34 hPa
- at the temperature of:
- 25 °C
Additional information
GLP study according to OECD Guideline 104 and EU Method A.4 using the dynamic method.
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