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EC number: 210-502-3 | CAS number: 617-04-9
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:
- from 2021-02-02 to 2021-02-18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.001 Pa
- Conclusions:
- The vapour pressure of the test at 20 °C was determined to be 3.7E-04 Pa.
- Executive summary:
An experimental study was conducted to determine the vapour pressure of the test item according to Regulation (EC) No. 440/2008 Method A.4. and OECD Test Guideline 104 using the effusion method: Knudsen cell. The vapour pressure was determined in a range of 44 to 109 °C. The vapour pressures of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C to be 3.7E-04 Pa and 5.1E-04 Pa, respectively.
Reference
The vapour pressure was measured in the temperature range of 44 to 109 °C. The measured vapour pressure values together with the measured temperatures are listed in the next table.
No. | Temperature / °C | Vapour pressure / Pa |
1 | 44 | 1.23E-03 |
2 | 54 | 2.39E-03 |
3 | 64 | 9.24E-03 |
4 | 84 | 1.22E-02 |
5 | 89 | 1.95E-02 |
6 | 99 | 2.57E-02 |
7 | 109 | 2.74E-02 |
From the measured data points of the vapour pressure curve the constants A and B of the Antoine equation.
Antoine equation: log p = A + [B / (C + ϑ)]
A = 5.1928
B = -2529.65
C = 273.15
The vapour pressure of the test item calculated by extrapolation and interpolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.
Description of key information
The vapour pressure of the test at 20 °C was determined to be 3.7E-04 Pa (reference 4.6-1).
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
An experimental study was conducted to determine the vapour pressure of the test item according to Regulation (EC) No. 440/2008 Method A.4. and OECD Test Guideline 104 using the effusion method: Knudsen cell. The vapour pressure was determined in a range of 44 to 109 °C. The vapour pressures of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C to be 3.7E-04 Pa and 5.1E-04 Pa, respectively.
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