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EC number: 608-770-5 | CAS number: 326894-55-7
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:
- 19.-21.05.2015
- 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:
- European Commission Regulation (EC) No. 440/2008
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 0.002 Pa
- Conclusions:
- The vapour pressure at 20, 25 and 50 °C was determined to be 1.1E-5, 2.8E-5 and 1.9E-3 Pa respectively.
- Executive summary:
A study was conducted according to Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at different temperatures (40 - 80 °C) using the effusion method (weight loss). The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The values for 20, 25 and 50 °C were calculated using the Antoine equation. The vapour pressure at 20, 25 and 50 °C was determined to be 1.1E-5, 2.8E-5 and 1.9E-3 Pa respectively.
Reference
The vapour pressure was measured twice. The measurement was performed in the temperature range of 40 °C to 80 °C.
Temperature / °C |
Vapour pressure / hPa |
40 |
8.3E-6 |
50 |
1.9E-5 |
60 |
8.5E-5 |
70 |
3.5E-4 |
80 |
1.3E-3 |
Antoine parameters and extrapolated vapour pressures
T / ° C |
p / hPa |
log (p/hPa) = A + B/(C+T[°C]) |
20 |
1.1E-5 |
A = 14.44513 |
25 |
2.8E-5 |
B = -5831.25 |
50 |
1.9E-3 |
C = 273.15 |
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C
T/°C |
p/hPa |
p/ Pa |
20 |
1.1E-7 |
1.1E-5 |
25 |
2.8E-7 |
2.8E-5 |
50 |
1.9E-5 |
1.9E-3 |
Description of key information
The vapour pressure at 20, 25 and 50 °C was determined to be 1.1E-5, 2.8E-5 and 1.9E-3 Pa respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
A study was conducted according to Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at different temperatures (40 - 80 °C) using the effusion method (weight loss). The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The values for 20, 25 and 50 °C were calculated using the Antoine equation. The vapour pressure at 20, 25 and 50 °C was determined to be 1.1E-5, 2.8E-5 and 1.9E-3 Pa respectively.
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