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EC number: 203-699-2 | CAS number: 109-73-9
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:
- 2010-01-18
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Comparable to guideline study with acceptable restrictions (e.g. non-GLP)
- Qualifier:
- according to guideline
- Guideline:
- other: DIN-EN 13016-2
- GLP compliance:
- no
- Other quality assurance:
- other: The laboratory complied with a quality management system according to DIN EN ISO 9001 : 2008 and DIN EN ISO 14001 : 2005
- Type of method:
- static method
- Remarks:
- MiniVap (Fa. Grabner-Instruments)
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 102 hPa
- Conclusions:
- Vapour pressure (DIN-EN 13016-2): 102 hPa at 20°C
- Executive summary:
The vapour pressure was determined following the static method according to guideline DIN-EN 13016-2 using the "MiniVap" device (Co. Grabner-Instruments).
The vapour pressure was determined to be 102 hPa at 20°C. The value is based on 16 measurements within the temperature range of 20 °C to 95 °C.
The laboratory complied with a quality management system according to DIN EN ISO 9001 : 2008 and DIN EN ISO 14001 : 2005.
Reference
The following regression equation was derived:
y = -1748.7x + 7.9763, R^2 = 0.9999
y: log P [hPa]
x: 1/T [°K]
This yields for 20°C a vapour pressure of 102 hPa.
The regression was based on the following experimental data:
| Temperature | Vapour pressure [hPa] |
| 20 °C | 102 |
| 25 °C | 128 |
| 30 °C | 161 |
| 35 °C | 200 |
| 40 °C | 247 |
| 45 °C | 303 |
| 50 °C | 369 |
| 55 °C | 447 |
| 60 °C | 539 |
| 65 °C | 643 |
| 70 °C | 764 |
| 75 °C | 902 |
| 80 °C | 1059 |
| 85 °C | 1239 |
| 90 °C | 1443 |
| 95 °C | 1670 |
Description of key information
Vapour pressure (DIN-EN 13016-2):
102 hPa at 20 °C
128 hPa at 25 °C
Key value for chemical safety assessment
- Vapour pressure:
- 102 hPa
- at the temperature of:
- 293 K
Additional information
In the valid key study (OXEA, 2009) the vapour pressure was determined following the static method according to guideline DIN-EN 13016-2 using the "MiniVap" device (Co. Grabner-Instruments).
The vapour pressure was determined to be 102 hPa at 20°C. The value is based on 16 measurements within the temperature range of 20 °C to 95 °C.
The laboratory complied with a quality management system according to DIN EN ISO 9001 : 2008 and DIN EN ISO 14001 : 2005.
The following supporting studies corroborate this result:
BASF (1973): Vapour pressure (static method): 93.3 hPa at 20°C
BASF (1997): Vapour pressure (static method): 99.8 hPa at 20°C (extrapolated from temperatures >= 40°C via Antoine equation)
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