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EC number: 206-031-8 | CAS number: 292-64-8
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:
- 2021-04-23
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- European Commission Regulation (EC) No. 440/2008 and No. 761/2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- dynamic method
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 546 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 741 Pa
- Key result
- Temp.:
- 50 °C
- Vapour pressure:
- 2 864 Pa
- Conclusions:
- The vapour pressure of the test item was determined to be 546 Pa (20 °C), 741 Pa (25 °C) and 2864 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 using the dynamic method at various temperatures between about 43 and 146 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants with following results: 546 Pa (20 °C), 741 Pa (25 °C) and 2864 Pa (50 °C).
Reference
The vapour pressure was measured with the dynamic method in the temperature range of 43 °C to
146 °C. The measured vapour pressures at the corresponding temperatures are listed in the following
table:
Table 1: Measured vapour pressures and corresponding temperatures
Temperature /°C | Vapour pressure / hPa |
42.9 | 20.0 |
57.0 | 40.0 |
69.6 | 70.0 |
78.3 | 100.0 |
96.8 | 200.0 |
117.8 | 400.0 |
131.5 | 600.0 |
146.4 | 900.0 |
108.8 | 300.0 |
88.9 | 150.0 |
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C.
Table 2 : Final vapour pressures
T/°C | p/hPa | p/Pa |
20 | 5.46 | 546 |
25 | 7.46 | 741 |
50 | 28.64 | 2864 |
The vapour pressure of the test item was determined to be 546 Pa (20 °C), 741 Pa (25 °C) and 2864 Pa (50 °C).
Description of key information
The vapour pressure of the test item was determined to be 546 Pa (20 °C), 741 Pa (25 °C) and 2864 Pa (50 °C) (reference 4.6-1).
Key value for chemical safety assessment
- Vapour pressure:
- 741 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 dynamic method. The vapour pressure was measured at various temperatures between about 43 and 146 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants with following results: 546 Pa (20 °C), 741 Pa (25 °C) and 2864 Pa (50 °C).
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