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EC number: 203-184-2 | CAS number: 104-20-1
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:
- 2015-11-30 to 2015-12-01
- 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:
- dynamic method
- Temp.:
- 50 °C
- Vapour pressure:
- ca. 0.5 hPa
- Temp.:
- 25 °C
- Vapour pressure:
- ca. 0.12 hPa
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- ca. 0.09 hPa
- Conclusions:
- The vapour pressure of the test substance at 20°C is 0.09 hPa.
- Executive summary:
The vapour pressure of the test substance has been determined by vapour-liquid equilibrium measurement according to the OECD test guideline 104 and Regulation EC No. 440/2008 Method A.4.
The vapour pressure of the test substance at 20°C, 25°C and 50°C is 0.09hPa, 0.12hPa and 0.50 hPa respectively.
Reference
Thermal Stability:
The test item in a closed glass crucible showed a small exothermic effect in the temperature range of 130 - 180 °C with an energy of - 10 J.
Results of the DSC-measurements on thermal stability:
| No | Sample weight / mg | Start of effect / °C | Energy/J/g |
| PN10160 | 10.29 | 130 | -10 |
Dynamic method: Vapour-liquid equilibrium (VLE):
The vapour pressure was measured in the temperature range of 129.1 to 179.9°C. The measured vapour pressure values together with the measured temperatures are listed below
Results of the dynamic method:
| No. | Temperature / °C | Vapour pressure / hPa |
| 1 | 129.1 | 13.5 |
| 2 | 142.0 | 19.3 |
| 3 | 156.5 | 30.1 |
| 4 | 166.0 | 39.8 |
| 5 | 173.8 | 49.9 |
| 6 | 179.9 | 59.6 |
| 7 | 169.5 | 44.9 |
| 8 | 159.5 | 34.0 |
| 9 | 149.0 | 24.5 |
The vapour pressure of the test substance was calculated by extrapolation of the measured vapour pressure curve for the temperature 20, 25 and 50°C.
The Antoine constants were found to be: A = 8.9236, B = -2335.45 and C = 273.15.
Description of key information
The vapour pressure of the test substance at 20°C, 25°C and 50°C is 0.09 hPa, 0.12hPa and 0.50 hPa respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0.09 hPa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test substance has been determined by calculation according to the OECD test guideline 104 and Regulation EC No. 440/2008 Method A.4.
The vapour pressure of the test substance at 20°C, 25°C and 50°C is 0.09hPa, 0.12hPa and 0.5hPa respectively.
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