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EC number: 949-569-5 | 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:
- 2019-03-11
- 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
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 3 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 5 Pa
- Test no.:
- #3
- Temp.:
- 50 °C
- Vapour pressure:
- 39 Pa
- Conclusions:
- The vapour pressure of the test item was determined to be 3 Pa at 20 °C, 5 Pa at 25 °C and 39 Pa at 50 °C respectively.
- Executive summary:
A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. A vapour pressure curve with 9 data points was measured over a pressure range between 15.2 to 37.8 hPa. For control 3 measuring points were evaluated with decreasing pressure. The vapour pressure was measured in the temperature range of 109.6 to 148.1 °C. From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation was 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 3 Pa at 20 °C, 5 Pa at 25 °C and 39 Pa at 50 respectively.
Reference
The vapour pressure was measured in the temperature range of 109.6 to 148.1 °C.
Results of the dynamic method
No. |
Temperature / °C |
Vapour pressure/ hPa |
Rem ark |
1 |
109.6 |
15.2 |
measured up |
2 |
119.3 |
29.6 |
measured up |
3 |
128.6 |
44.4 |
measured up |
4 |
134.8 |
59.6 |
measured up |
5 |
140.5 |
74.6 |
measured up |
6 |
148.1 |
99.2 |
measured up |
7 |
142.3 |
81.1 |
measured down |
8 |
135.1 |
62.1 |
measured down |
g |
122.9 |
37.8 |
measured down |
From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation was derived by regression of the data points to A = 12.0288; B = -3371.47; C = 273.15. 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.
Calculated vapour pressure values for 20, 25 and 50 °C
Temperature/ °C |
Vapour pressure / hPa |
20 |
0 03 |
25 |
0 05 |
50 |
0 39 |
Description of key information
The vapour pressure of the test item was determined to be 3 Pa at 20 °C, 5 Pa at 25 °C and 39 Pa at 50 °C respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 3 Pa
- 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 to determine the vapour pressure of the test item. A vapour pressure curve with 9 data points was measured over a pressure range between 15.2 to 37.8 hPa. For control 3 measuring points were evaluated with decreasing pressure. The vapour pressure was measured in the temperature range of 109.6 to 148.1 °C. From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation was 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 3 Pa at 20 °C, 5 Pa at 25 °C and 39 Pa at 50 respectively.
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