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EC number: 608-148-3 | CAS number: 279246-65-0
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:
- 04.05-12.06.2006
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: Knudsen cell
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0.07 Pa
- Remarks on result:
- other:
- Remarks:
- extrapolated by calculation
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0.14 Pa
- Remarks on result:
- other:
- Remarks:
- extrapolated by calculation
- Test no.:
- #3
- Temp.:
- 50 °C
- Vapour pressure:
- 3.8 Pa
- Remarks on result:
- other:
- Remarks:
- extrapolated by calculation
- Conclusions:
- The vapour pressure of the test item was determined to be 7.0E-3 Pa (20 °C), 1.4E-2 Pa (25 °C) and 3.8E-1 Pa (50 °C).
- Executive summary:
A study was performed according to OECD TG 104 and Commission Regulation (EC) No. 440/2008, method A.4 in order to determine the vapour pressure of the test item by using the effusion method. The vapour pressure was measured by determining the boiling point of the test item at various temperatures between about 23 to 46 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants with following results: 7.0E-3 Pa (20 °C), 1.4E-2 Pa (25 °C) and 3.8E-1 Pa (50 °C).
Reference
Individual results
The vapour pressure was measured in the temperature range of 23 °C to 64 °C. Above 46 °C a vapour pressure could be measured. The measured vapour pressures at the corresponding temperatures are listed in Table 1.
Table 1: Measured vapour pressures and corresponding temperatures
| Temperature (°C) | Vapour pressure (hPa) |
| 46.1 | 2.1E-3 |
| 46.1 | 2.3E-3 |
| 46.1 | 2.4E-3 |
| 47.3 | 2.9E-3 |
| 53.3 | 5.7E-3 |
| 56.6 | 8.0E-3 |
| 58.8 | 1.1E-2 |
| 61.4 | 1.4E-2 |
| 63.5 | 1.8E-2 |
The values for 20, 25 nd 50 °C are calculated, using the Antoine constants A, B and C (see Table 2).
Table 2: Calculated vapour pressure at 20, 25 and 50°C.
| T (°C) | p (Pa) |
| 20 | 7.0E-3 |
| 25 | 1.4E-2 |
| 50 | 3.8E-1 |
Description of key information
The vapour pressure of the test item was determined to be 7.0E-3 Pa (20 °C), 1.4E-2 Pa (25 °C) and 3.8E-1 Pa (50 °C) using the effusion method.
Key value for chemical safety assessment
- Vapour pressure:
- 0.14 Pa
- at the temperature of:
- 25 °C
Additional information
A study was performed according to OECD TG 104 and Commission Regulation (EC) No. 440/2008, method A.4 in order to determine the vapour pressure of the test item by using the effusion method. The vapour pressure was measured by determining the boiling point of the test item at various temperatures between about 23 to 46 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants with following results: 7.0E-3 Pa (20 °C), 1.4E-2 Pa (25 °C) and 3.8E-1 Pa (50 °C).
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