Registration Dossier
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EC number: 422-030-7 | CAS number: 91538-82-8
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:
- 20.10.2005-21.02.2006
- 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:
- no
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.002 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.005 hPa
- Key result
- Temp.:
- 50 °C
- Vapour pressure:
- 0.35 hPa
- Conclusions:
- The vapour pressure of the test item was determined to be 2.1E-3 Pa (20 °C), 5.3E-3 Pa (25 °C) and 3.5E-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 24 and 59°C. The vapour pressures of the test item at 20, 25 and 50 °C determined to be: .1E-3 Pa (20 °C), 5.3E-3Pa (25 °C) and 3.5E-1 Pa (50 °C).
Reference
Individual results
The vapour pressure was measured in the temperature range of 24 °C to 59 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1.
Table: Measured vapour pressures and corresponding temperatures
Temperature /°C |
Vapour pressure / hPa |
23.8 |
3.4E-5 |
24.6 |
5.7E-5 |
29.0 |
1.1E-4 |
31.8 |
1.9E-4. |
33.7 |
2.5E-4 |
40.0 |
7.0E-4 |
44.0 |
1.3E-3 |
48.8 |
3.2E-3 |
52.4 |
5.2E-3 |
57.0 |
9.0E-3 |
Table 2: Calculated vapour pressure at 20, 25 and 50°C.
| T (°C) | p (Pa) |
| 20 | 2.1E-3 |
| 25 | 5.3E-3 |
| 50 | 3.5E-1 |
Description of key information
Key value for chemical safety assessment
- Vapour pressure:
- 0.005 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 24 and 59°C. The vapour pressures of the test item at 20, 25 and 50 °C determined to be: .1E-3 Pa (20 °C), 5.3E-3Pa (25 °C) and 3.5E-1 Pa (50 °C). (reference 4.6-1).
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