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EC number: 275-073-7 | CAS number: 70969-70-9
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:
- 2012-05-28 to 2012-03-13
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- no
- Type of method:
- gas saturation method
- Temp.:
- 25 °C
- Vapour pressure:
- 0.094 Pa
- Remarks on result:
- other: with confidence interval of 0.02; the temperature is quoted as ±0.5 °C
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.083 Pa
- Remarks on result:
- other: with confidence interval of 0.02; the temperature is quoted as ±0.5 °C
- Conclusions:
- Vapour pressure: 0.094 Pa at 25 °C; 0.083 Pa at 20 °C.
- Executive summary:
In a guideline test, the vapour pressure of the test substance was determined to be 0.094 Pa at 25 °C and 0.083 Pa at 20 °C.
Reference
Vapour pressure data at 25 °C
Sample name |
Actual ppm in solution |
Sample in g |
Temperature (K) |
Total gas flow (mins) |
Average gas flow (seconds/100 ml) |
Gas flow (L) |
Total Gas Flow (M³) |
RT/M |
Vapour pressure (Pa) |
Average vapour pressure (Pa) |
% difference in gas flow rate (of extremities) |
% difference in vapour pressure (of extremities) |
Total average vapour pressure (Pa) |
VP1 |
14.346241687 |
7.17312E-03 |
298.15 |
4250 |
41 |
0.145 |
0.618181818 |
9.165535589 |
0.106353006 |
0.106384190 |
47.3 |
35.7 |
0.09405 |
14.354654871 |
7.17733E-03 |
0.106415375 |
|||||||||||
VP2 |
16.520307519 |
8.26015E-03 |
33 |
0.183 |
0.778625954 |
0.097233765 |
0.097379891 |
||||||
16.569961804 |
8.28498E-03 |
0.097526016 |
|||||||||||
VP3 |
15.733097401 |
7.86655E-03 |
28 |
0.214 |
0.910714286 |
0.079169871 |
0.078399943 |
||||||
15.427088438 |
7.71354E-03 |
0.077630015 |
Vapour pressure data at 20 °C
Sample name |
Actual ppm in solution |
Sample in g |
Temperature (K) |
Total gas flow (mins) |
Average gas flow (seconds/100 ml) |
Gas flow (L) |
Total Gas Flow (M³) |
RT/M |
Vapour pressure (Pa) |
Average vapour pressure (Pa) |
% difference in gas flow rate (of extremities) |
% difference in vapour pressure (of extremities) |
Total average vapour pressure (Pa) |
VP1 |
12.433492870 |
6.21675E-03 |
293.15 |
4560 |
41 |
0.145 |
0.663272727 |
9.011828804 |
0.084466393 |
0.085667022 |
47.3 |
21.8 |
0.08322 |
12.786959282 |
6.39348E-03 |
0.086867651 |
|||||||||||
VP2 |
16.136146864 |
8.06807E-03 |
34 |
0.179 |
0.816716418 |
0.089024899 |
0.090050903 |
||||||
16.508082339 |
8.25404E-03 |
0.091076908 |
|||||||||||
VP3 |
15.899978645 |
7.94999E-03 |
28 |
0.214 |
0.977142857 |
0.073319824 |
0.073930488 |
||||||
16.164832854 |
8.08242E-03 |
0.074541151 |
Acceptance criteria were achieved for the 20 °C determination but not for the 25 °C determination with the difference on vapour pressure of the extreme values being approximately 36 %. However due to the relatively low vapour pressure being measured and therefore minor differences between individual values (0.078, 0.097 and 0.106 Pa), and the relative similarity in results obtained at the two temperatures as expected, this is not expected to have significantly affected the values reported and the results are deemed acceptable.
Description of key information
Vapour pressure: 0.094 Pa at 25 °C; 0.083 Pa at 20 °C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.094 Pa
- at the temperature of:
- 25 °C
Additional information
In a guideline test, the vapour pressure of the test substance was determined to be 0.094 Pa at 25 °C and 0.083 Pa at 20 °C.
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