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EC number: 700-701-8 | CAS number: 798556-07-7
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:
- 19.08.2011 - 09.11.2011
- 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)
- 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 Pa
- Conclusions:
- The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively.
- Executive summary:
A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure was measured in the temperature range of 29 °C to 131 °C using the effusion method (vapour pressure balance). Above 67 °C a vapour pressure could be measured. The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively.
Reference
The vapour pressure was measured in the temperature range of 29 °C to 131 °C. Above 67 °C a vapour pressure could be measured.
Temperature / °C |
Vapour pressure / hPa |
67.4 |
9.8E-6 |
73.9 |
2.0E-5 |
79.3 |
3.6E-5 |
86.4 |
6.0E-5 |
89.6 |
6.7E-5 |
95.8 |
1.4E-4 |
101.2 |
1.6E-4 |
107.1 |
2.8E-4 |
113.8 |
4.2E-4 |
119.5 |
7.0E-4 |
125.1 |
1.2E-3 |
130.5 |
1.9E-3 |
The values for 20, 25 and 50 °C were calculated, using the Antoine constants A, B and C.
T/°C |
log (p/hPa) = A+B/(C+T[°C]) |
p/hPa |
p/Pa |
20 |
A = 8.99633 |
5.7E-8 |
5.7E-6 |
25 |
B = -4760.98 |
1.1E-7 |
1.1E-5 |
50 |
C = 273.15 |
1.8E-6 |
1.8E-4 |
Description of key information
The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, 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 OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure was measured in the temperature range of 29 °C to 131 °C using the effusion method (vapour pressure balance). Above 67 °C a vapour pressure could be measured. The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively (reference 4.6-1).
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