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EC number: 947-711-0 | CAS number: -
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:
- from 2018-01-09 to 2018-03-01
- 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
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- dynamic method
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.03 hPa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.04 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 0.21 hPa
- Conclusions:
- The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C to be 0.03, 0.04 and 0.21 hPa, respectively.
- Executive summary:
A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. A vapour pressure curve with 9 data points was measured over a pressure range between 20 to 100 hPa. For control 3 measuring points were evaluated with decreasing pressure. The vapour pressure was measured in the temperature range of 142.4 to 189.8 °C. From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation were derived and the vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. The vapour pressure was determined to be 0.03 hPa at 20 °C, 0.04 hPa at 25 °C and 0.21 hPa at 50 °C, respectively.
Reference
The vapour pressure was measured in the temperature range of 142.4 to 189.8 °C.
No. |
Temperature / °C |
Vapour pressure / hPa |
Remark |
1 |
142.4 |
20.1 |
measured up |
2 |
157.4 |
35.0 |
measured up |
3 |
166.1 |
44.9 |
measured up |
4 |
171.8 |
59.9 |
measured up |
5 |
180.8 |
79.9 |
measured up |
6 |
189.8 |
99.9 |
measured up |
7 |
186.7 |
90.0 |
measured down |
8 |
175.1 |
69.9 |
measured down |
9 |
170.4 |
54.9 |
measured down |
From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equationcan be derived by regression of the data points to
A = 10.2170
B = -2872.14
C = 273.15
The vapour pressure of the test item was calculated by extrapolationof the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.
Temperature / °C |
Vapour pressure / hPa |
20 |
0.03 |
25 |
0.04 |
50 |
0.21 |
Description of key information
The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C to be 0.03, 0.04 and 0.21 hPa, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0.03 hPa
- at the temperature of:
- 20 °C
Additional information
A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. A vapour pressure curve with 9 data points was measured over a pressure range between 20 to 100 hPa. For control 3 measuring points were evaluated with decreasing pressure. The vapour pressure was measured in the temperature range of 142.4 to 189.8 °C. From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation were derived and the vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. The vapour pressure was determined to be 0.03 hPa at 20 °C, 0.04 hPa at 25 °C and 0.21 hPa at 50 °C, respectively.
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