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EC number: 203-385-5 | CAS number: 106-32-1
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:
- 2016-03-21 to 2016-03-29
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Test Guideline 113: Screening Test for Thermal Stability and Stability in Air
- Version / remarks:
- 1981
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- dynamic method
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.82 hPa
- Temp.:
- 25 °C
- Vapour pressure:
- 1.1 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 4.17 hPa
- Conclusions:
- The vapour pressure of the test item was found to be 0.82 hPa at 20°C.
- Executive summary:
The vapour pressure of the test substance was determined according to OECD 104, by the dynamic method, vapour-liquid equilibrium. Vapour pressure was measured in the range of 68.3 to 128.1 °C. In total 9 measurements were performed and the Antoine equation plotted by linear regression. The calculated vapour pressures are: 0.82 hPa at 20°C, 1.10 hPa at 25°C and 4.17 hPa at 50°C.
Reference
Preliminary test: The test item showed no exothermic effects in the temperature range of 25 - 300°C.
In total 9 measurements were performed:
| No. | Temperature / °C | Vapour pressure / hPa | Remark |
| 1 | 68.3 | 10.2 | measured up |
| 2 | 92.2 | 24.8 | measured up |
| 3 | 111.1 | 49.8 | measured up |
| 4 | 117.8 | 64.9 | measured up |
| 5 | 123.3 | 79.7 | measured up |
| 6 | 128.1 | 94.6 | measured up |
| 7 | 125.4 | 87.1 | measured down |
| 8 | 120.5 | 74.3 | measured down |
| 9 | 112.3 | 57.1 | measured down |
The constants derived for the Antoine equation are:
A = 9.5472
B = -2238.38
C = 273.15
Description of key information
The vapour pressure of the test item was determined experimentally, according to OECD 104 by the dynamic method, vapour-liquid equilibrium. The test item was found to have a vapour pressure of 0.82 hPa at 20°C, 1.10 hPa at 25°C and 4.17 hPa at 50°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.82 hPa
- at the temperature of:
- 20 °C
Additional information
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