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EC number: 947-370-8 | 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:
- 23 November 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- The study was conducted according to an internationally recognised method. Test substance is adequately characterised. Therefore full validation applies.
- 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:
- 2009
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Inspected on 13 and 14 October 2014 / Signed on 8 April 2015
- Type of method:
- static method
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 573 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 822 Pa
- Conclusions:
- Ten pairs temperature/vapour pressure were used to calculate a regression from which vapour pressure at ambient temperature could be estimated.
From the measured values, the vapour pressure of the test item was calculated as 573 Pa at 20.0 °C and 822 Pa at 25 °C. The values of the heating and cooling down phase showed good correspondence. - Executive summary:
The study was performed in order to determine the vapour pressure of test item according to OCED 104, resp. EU A.4 guideline, using the static method.
From the measured values, the vapour pressure of the test item was calculated as 573 Pa at 20.0 °C and 822 Pa at 25 °C.
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 28 November 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- The study was conducted according to an internationally recognised method. Test substance is adequately characterised. Therefore full validation applies.
- 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:
- 2009
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Inspected on 13 and 14 October 2014 / Signed on 8 April 2015
- Type of method:
- static method
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 511 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 706 Pa
- Conclusions:
- The vapour pressure of test item was measured using the static method as described in OECD 104 resp. EU A.4.
Ten pairs temperature/vapour pressure were used to calculate a regression from which vapour pressure at ambient temperature could be estimated.
From the measured values, the vapour pressure of the test item was calculated as 511 Pa at 20.0 °C and 706 Pa at 25 °C.
The values of the heating and cooling down phase showed good correspondence.
Therefore, the result of the study is considered valid. - Executive summary:
The study was performed in order to determine the vapour pressure of test item according to OCED 104, resp. EU A.4 guideline, using the static method.
The vapour pressure of test item was calculated as 511 Pa at 20°C and 706 Pa at 25°C.
Referenceopen allclose all
The calculation results are presented in the following table:
n |
Temperature T |
Pressure p |
Temperature T |
1/T |
log p |
|
°C |
hPa |
K |
1/K |
log Pa |
1 |
20.0 |
5.2 |
293.15 |
0.00341122 |
2.7160 |
2 |
28.9 |
11.0 |
302.05 |
0.00331071 |
3.0414 |
3 |
38.0 |
21.6 |
311.15 |
0.00321388 |
3.3345 |
4 |
47.0 |
36.0 |
320.15 |
0.00312354 |
3.5563 |
5 |
55.0 |
48.7 |
328.15 |
0.00304739 |
3.6875 |
6 |
46.0 |
34.6 |
319.15 |
0.00313332 |
3.5391 |
7 |
37.0 |
20.6 |
310.15 |
0.00322425 |
3.3139 |
8 |
28.0 |
9.8 |
301.15 |
0.00332060 |
2.9912 |
9 |
21.0 |
6.7 |
294.15 |
0.00339963 |
2.8261 |
10 |
16.0 |
4.0 |
289.15 |
0.00345841 |
2.6021 |
The parameters for the linear regression of the graph log (p) vs. 1/T are presented in the following table:
Parameter |
Value |
Slope |
-2738.958416 |
Intercept |
12.10156734 |
Correlation coefficient r |
-0.99524888 |
Coefficient of determination r2 |
0.990520333 |
Vapour pressures at ambient temperature were calculated as:
Parameter |
Value |
Unit |
Vapour Pressure (20 °C) |
573 |
Pa |
Vapour Pressure (25 °C) |
822 |
Pa |
The calculation results are presented in the following table:
n |
Temperature T |
Pressure p |
Temperature T |
1/T |
log p |
|
°C |
hPa |
K |
1/K |
log Pa |
1 |
20.0 |
5.0 |
293.15 |
0.00341122 |
2.6990 |
2 |
28.9 |
9.0 |
302.05 |
0.00331071 |
2.9542 |
3 |
38.1 |
17.3 |
311.25 |
0.00321285 |
3.2380 |
4 |
47.0 |
25.8 |
320.15 |
0.00312354 |
3.4116 |
5 |
56.0 |
44.8 |
329.15 |
0.00303813 |
3.6513 |
6 |
48.0 |
24.9 |
321.15 |
0.00311381 |
3.3962 |
7 |
39.1 |
15.0 |
312.25 |
0.00320256 |
3.1761 |
8 |
30.0 |
9.9 |
303.15 |
0.00329870 |
2.9956 |
9 |
21.0 |
6.4 |
294.15 |
0.00339963 |
2.8062 |
10 |
16.0 |
3.5 |
289.15 |
0.00345841 |
2.5441 |
The parameters for the linear regression of the graph log (p) vs. 1/T are presented in the following table:
Parameter |
Value |
Slope |
-2453.915043 |
Intercept |
11.07952542 |
Correlation coefficient r |
-0.993756131 |
Coefficient of determination r2 |
0.987551247 |
Using the equation which is stated in chapter9, vapour pressures at ambient temperature were calculated as:
Parameter |
Value |
Unit |
Vapour Pressure (20 °C) |
511 |
Pa |
Vapour Pressure (25 °C) |
706 |
Pa |
Description of key information
The vapour pressure of test item was calculated to be between 511 and 573 Pa at 20°C and between 706-822 Pa at 25°C.
Key value for chemical safety assessment
Additional information
Two fully reliable experimental studies, conducted according to OECD 104 /EU A4 guideline, using static method, are available.
Both are considered as a key study, and the result is retained as key data.
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