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Registration Dossier
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EC number: 265-116-8 | CAS number: 64742-16-1 A complex combination of organic compounds, predominantly hydrocarbons, obtained as a fraction of the extract from solvent extraction of residuum. It consists predominantly of high molecular weight compounds with high carbon-to-hydrogen ratios.
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:
- 17. Sep. 2018 to 11. Oct. 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- OECD Guidelines for the Testing of Chemicals, Method No. 104, adopted 23. Mar. 2006: “Vapour Pressure“
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- Commission Regulation (EC) No 761/2009 of 23. July 2009, published on 24. Aug. 2009 Method A.4: “Vapour Pressure”
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Specific details on test material used for the study:
- No further details specified in the study report.
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: molecular mass of 1334 g/mol
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: molecular mass of 1334 g/mol
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: molecular mass of 728 g/mol
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: molecular mass of 728 g/mol
- Conclusions:
- Vapour Pressures (Effusion Method) for molecular mass of 728 g/mol
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20°C and at 25°C were calculated from the regression equation:
Vapour pressure at 20 °C: 2.09 * 10-05Pa
Vapour pressure at 25 °C: 2.96 * 10-05Pa
Vapour Pressures (Effusion Method) for molecular mass of 1334 g/mol
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20°C and at 25°C were calculated from the regression equation:
Vapour pressure at 20 °C: 1.54 * 10-05Pa
Vapour pressure at 25 °C: 2.19 * 10-05Pa - Executive summary:
Determination of the Vapour Pressure of Petroleum Resins (Kendex 0897) according to OECD 104 resp. EU A.4 using the effusion method: Knudsen Cell.
Findings and Results:
The vapour pressure ofPetroleum Resins (Kendex 0897)was determined according to OECD 104 resp. EU A.4 using the effusion method (weight loss).
Vapour pressure was examined at seven different temperature. Three temperatures could be evaluated as they showed reproducible weight loss. For these temperatures, 1/T was plotted against log (p).
Note: For the calculation of the vapour pressure a molecular mass range of 728 – 1334 g/mol was used.
Vapour Pressures (Effusion Method) for molecular mass of 728 g/mol
Experiment
T
Mean p
Stand. Dev. p
RSD p
No.
K
Pa
Pa
%
5
363.2
1.17E-03
2.7533E-03
-2.9325
6
378.2
2.32E-03
2.6441E-03
-2.6339
7
393.2
4.23E-03
2.5432E-03
-2.3737
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
The graph 1/T vs. log (P) shows a straight line with a correlation coefficient of - 0.9997.
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C:2.09* 10-05Pa
Vapour pressure at 25 °C:2.96* 10-05Pa
Vapour Pressures (Effusion Method) for molecular mass of 1334 g/mol
Experiment
T
Mean p
Stand. Dev. p
RSD p
No.
K
Pa
Pa
%
5
363.2
8.63E-04
2.7533E-03
-3.0641
6
378.2
1.72E-03
2.6441E-03
-2.7654
7
393.2
3.12E-03
2.5432E-03
-2.5052
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
The graph 1/T vs. log (P) shows a straight line with a correlation coefficient of - 0.9999.
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C:1.54* 10-05Pa
Vapour pressure at 25 °C:2.19* 10-05Pa
Reference
Findings
Sample Weights
The mass of sample in the respective cell is presented in the following table:
Sample Weights
Parameter |
Cell empty |
Cell + test item |
Cell + test item + cap |
Test item |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
2.55319 |
3.96720 |
4.17611 |
1.41401 |
Knudsen-cell 2 |
2.54619 |
3.89520 |
4.10536 |
1.34901 |
Knudsen-cell 3 |
2.54535 |
3.95816 |
4.17012 |
1.41281 |
Knudsen-cell 4 |
2.58035 |
4.12534 |
4.33653 |
1.54499 |
Measurement Data
The data of the evaluated experiments is presented in the following tables:
Measurement Data Experiment 1
Experiment |
1 |
|
|
|
Nom. Temperature |
30 |
°C |
|
|
Date and time START |
|
17.09.2018 15:10 |
18.09.2018 13:50 |
19.09.2018 13:30 |
Date and time END |
|
18.09.2018 12:45 |
19.09.2018 12:50 |
20.09.2018 11:00 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.17611 |
4.16005 |
4.15992 |
4.15981 |
Knudsen-cell 2 |
4.10536 |
4.09705 |
4.09693 |
4.09687 |
Knudsen-cell 3 |
4.17012 |
4.10108 |
4.10097 |
4.10080 |
Knudsen-cell 4 |
4.33653 |
4.14204 |
4.14191 |
4.14168 |
Measurement Data Experiment 2
Experiment |
2 |
|
|
|
Nom. Temperature |
45 |
°C |
|
|
Date and time START |
|
20.09.2018 11:35 |
21.09.2018 09:55 |
22.09.2018 08:50 |
Date and time END |
|
21.09.2018 09:10 |
22.09.2018 07:45 |
23.09.2018 09:40 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.15981 |
4.13860 |
4.13855 |
4.13850 |
Knudsen-cell 2 |
4.09687 |
4.09656 |
4.08370 |
4.08371 |
Knudsen-cell 3 |
4.10080 |
4.10053 |
4.10049 |
4.10048 |
Knudsen-cell 4 |
4.14168 |
4.12792 |
4.12779 |
4.12766 |
Measurement Data Experiment 3
Experiment |
3 |
|
|
|
Nom. Temperature |
60 |
°C |
|
|
Date and time START |
|
23.09.2018 10:25 |
24.09.2018 11:40 |
25.09.2018 11:40 |
Date and time END |
|
24.09.2018 11:00 |
25.09.2018 11:05 |
26.09.2018 11:05 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.13850 |
4.13779 |
4.13745 |
4.13738 |
Knudsen-cell 2 |
4.08371 |
4.08298 |
4.08267 |
4.08264 |
Knudsen-cell 3 |
4.10048 |
4.09971 |
4.09932 |
4.09912 |
Knudsen-cell 4 |
4.12766 |
4.12694 |
4.12662 |
4.12650 |
Measurement Data Experiment 4
Experiment |
4 |
|
|
|
Nom. Temperature |
75 |
°C |
|
|
Date and time START |
|
26.09.2018 11:50 |
27.09.2018 11:50 |
01.10.2018 11:30 |
Date and time END |
|
27.09.2018 11:05 |
28.09.2018 10:05* |
02.10.2018 12:40 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.13738 |
4.13676 |
4.13634 |
4.13610 |
Knudsen-cell 2 |
4.08264 |
4.08203 |
4.08159 |
4.08149 |
Knudsen-cell 3 |
4.09912 |
4.09840 |
4.09779 |
4.09757 |
Knudsen-cell 4 |
4.12650 |
4.12583 |
4.12530 |
4.12508 |
*The samples were stored in an exsiccator after the weighings until start of the next measurement series due to organisational reasons.
Measurement Data Experiment 5
Experiment |
5 |
|
|
|
Nom. Temperature |
90 |
°C |
|
|
Date and time START |
|
02.10.2018 13:15 |
03.10.2018 09:50 |
04.10.2018 12:15 |
Date and time END |
|
03.10.2018 09:20 |
04.10.2018 11:15 |
05.10.2018 11:00 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.13610 |
4.13541 |
4.13500 |
4.13448 |
Knudsen-cell 2 |
4.08149 |
4.07790 |
4.07747 |
4.07709 |
Knudsen-cell 3 |
4.09757 |
4.09651 |
4.09597 |
4.09546 |
Knudsen-cell 4 |
4.12508 |
4.12420 |
4.12381 |
4.12342 |
Measurement Data Experiment 6
Experiment |
6 |
|
|
|
Nom. Temperature |
105 |
°C |
|
|
Date and time START |
|
05.10.2018 11:30 |
06.10.2018 09:40 |
07.10.2018 09:25 |
Date and time END |
|
06.10.2018 09:00 |
07.10.2018 08:45 |
08.10.2018 10:45 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.13448 |
4.13380 |
4.13300 |
4.13269 |
Knudsen-cell 2 |
4.07709 |
4.07651 |
4.07578 |
4.07547 |
Knudsen-cell 3 |
4.09546 |
4.09451 |
4.09344 |
4.09284 |
Knudsen-cell 4 |
4.12342 |
4.12259 |
4.12176 |
4.12130 |
Measurement Data Experiment 7
Experiment |
7 |
|
|
|
Nom. Temperature |
120 |
°C |
|
|
Date and time START |
|
08.10.2018 11:50 |
09.10.2018 11:30 |
10.10.2018 12:10 |
Date and time END |
|
09.10.2018 10:55 |
10.10.2018 11:20 |
11.10.2018 11:00 |
Parameter |
Weight m |
Weight m |
Weight m |
Weight m |
Unit |
g |
g |
g |
g |
Knudsen-cell 1 |
4.13269 |
4.13098 |
4.12990 |
4.12910 |
Knudsen-cell 2 |
4.07547 |
4.07407 |
4.07288 |
4.07245 |
Knudsen-cell 3 |
4.09284 |
4.09106 |
4.08948 |
4.08870 |
Knudsen-cell 4 |
4.12130 |
4.11948 |
4.11792 |
4.11688 |
Observations
30 °C. At the first measurement of experiment 1, all cells were slightly contaminated. Therefore, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, this measurement was not used for calculations.
30 °C .At the third measurement of experiment 1, all cells were slightly contaminated. Therefore, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, this measurement was not used for calculations.
90 °C. At the first measurement of experiment 5, all cells were slightly contaminated. Therefore, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, this measurement was not used for calculations.
105 °C. At the third measurement of experiment 6, all cells were slightly contaminated. Therefore, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, this measurement was not used for calculations.
120 °C. At the third measurement of experiment 7, all cells were slightly contaminated. Therefore, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, this measurement was not used for calculations.
Calculation of Results
Equation
The vapour pressure was calculated using the following equation:
p = (m/KAt) √(2ΠRT/M)
with
Equation Parameters of the molecular mass of 728 g/mol
Parameter |
Explanation |
Source/Value |
p |
vapour pressure in Pa |
to be calculated |
m |
weight loss in kg |
value given in tables (calculation results) is divided by 1000 |
t |
time in s |
as given in tables (calculation results) |
A |
area of aperture in m2 |
7.85 * 10-7m2 |
K |
correction factor |
0.909 |
R |
universal gas constant in J/Mol*K |
8.314472 |
T |
temperature in K |
as given in tables (calculation results) |
M |
molecular weight in kg/Mol |
0.728 |
Equation Parameters of the molecular mass of 1334 g/mol
Parameter |
Explanation |
Source/Value |
p |
vapour pressure in Pa |
to be calculated |
m |
weight loss in kg |
value given in tables (calculation results) is divided by 1000 |
t |
time in s |
as given in tables (calculation results) |
A |
area of aperture in m2 |
7.85 * 10-7m2 |
K |
correction factor |
0.909 |
R |
universal gas constant in J/Mol*K |
8.314472 |
T |
temperature in K |
as given in tables (calculation results) |
M |
molecular weight in kg/Mol |
1.334 |
The correction constant is depending on the relation length/radius of the aperture of the Knudsen cell and is stated in the literature as follows:
Correction factor K
Relation |
0.2 |
K |
0.909 |
With the chosen length of the aperture 0.1 mm and the chosen radius 0.5 mm, a relation of 0.2 was calculated, and a correction factor of 0.909 was chosen.
Calculation Results
The calculation results of experiment 5 – 7 (nominal temperature 90 – 120 °C) are given in the tables below. Experiment 1-4 (nominal temperature 30 - 75 °C) showed no reproducible weight loss. Therefore, they were not used for calculation.
In all tables, E-0X represents multiplication with 10-X
Calculation results for molecular mass 728 g/mol:
Calculation Results Experiment 5
Experiment |
5 |
|
|
|
|
|
|
|
|
||
Real Temperature in K |
363.2 |
|
|
|
|
|
|
|
|
||
Real Temperature in °C |
90.0 |
|
|
|
|
|
|
|
|
||
Date of Measurement |
03.10.2018 09:20 |
04.10.2018 11:15 |
05.10.2018 11:00 |
||||||||
Elapsed Time in s |
72300 |
91500 |
81900 |
||||||||
Parameter |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
||
Unit |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
||
Knudsen-cell 1 |
0.00069 |
yes |
2.16E-03 |
0.00041 |
yes |
1.01E-03 |
0.00052 |
yes |
1.44E-03 |
||
Knudsen-cell 2 |
0.00359 |
yes |
1.12E-02 |
0.00043 |
yes |
1.06E-03 |
0.00038 |
yes |
1.05E-03 |
||
Knudsen-cell 3 |
0.00106 |
yes |
3.32E-03 |
0.00054 |
yes |
1.33E-03 |
0.00051 |
yes |
1.41E-03 |
||
Knudsen-cell 4 |
0.00088 |
yes |
2.75E-03 |
0.00039 |
yes |
9.64E-04 |
0.00039 |
yes |
1.08E-03 |
||
Mean |
|
no |
|
|
yes |
1.09E-03 |
|
yes |
1.24E-03 |
||
Standard deviation: |
|
|
|
|
|
1.66E-04 |
|
|
2.08E-04 |
||
Mean of measured values: |
|
1.168E-03 |
|
|
|
|
|
|
|||
Standard deviation: |
|
1.053E-04 |
RSD: |
9.0% |
|
|
|
|
|||
If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.
Calculation Results Experiment 6
Experiment |
6 |
|
|
|
|
|
|
|
|
||
Real Temperature in K |
378.2 |
|
|
|
|
|
|
|
|
||
Real Temperature in °C |
105.0 |
|
|
|
|
|
|
|
|
||
Date of Measurement |
06.10.2018 09:00 |
07.10.2018 08:45 |
08.10.2018 10:45 |
||||||||
Elapsed Time in s |
77400 |
83100 |
91200 |
||||||||
Parameter |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
||
Unit |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
||
Knudsen-cell 1 |
0.00068 |
yes |
2.03E-03 |
0.00080 |
yes |
2.22E-03 |
0.00031 |
yes |
7.84E-04 |
||
Knudsen-cell 2 |
0.00058 |
yes |
1.73E-03 |
0.00073 |
yes |
2.03E-03 |
0.00031 |
yes |
7.84E-04 |
||
Knudsen-cell 3 |
0.00095 |
yes |
2.83E-03 |
0.00107 |
yes |
2.97E-03 |
0.00060 |
yes |
1.52E-03 |
||
Knudsen-cell 4 |
0.00083 |
yes |
2.47E-03 |
0.00083 |
yes |
2.30E-03 |
0.00046 |
yes |
1.16E-03 |
||
Mean |
|
yes |
2.27E-03 |
|
yes |
2.38E-03 |
|
no |
|
||
Standard deviation: |
|
|
4.86E-04 |
|
|
4.10E-04 |
|
|
|
||
Mean of measured values: |
|
2.323E-03 |
|
|
|
|
|
|
|||
Standard deviation: |
|
8.155E-05 |
RSD: |
3.5% |
|
|
|
|
|||
If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.
Calculation Results Experiment 7
Experiment |
7 |
|
|
|
|
|
|
|
|
||
Real Temperature in K |
393.2 |
|
|
|
|
|
|
|
|
||
Real Temperature in °C |
120.0 |
|
|
|
|
|
|
|
|
||
Date of Measurement |
09.10.2018 10:55 |
10.10.2018 11:20 |
11.10.2018 11:00 |
||||||||
Elapsed Time in s |
83100 |
85800 |
82200 |
||||||||
Parameter |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
||
Unit |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
||
Knudsen-cell 1 |
0.00171 |
yes |
4.84E-03 |
0.00108 |
yes |
2.96E-03 |
0.00080 |
yes |
2.29E-03 |
||
Knudsen-cell 2 |
0.00140 |
yes |
3.96E-03 |
0.00119 |
yes |
3.26E-03 |
0.00043 |
yes |
1.23E-03 |
||
Knudsen-cell 3 |
0.00178 |
yes |
5.04E-03 |
0.00158 |
yes |
4.33E-03 |
0.00078 |
yes |
2.23E-03 |
||
Knudsen-cell 4 |
0.00182 |
yes |
5.15E-03 |
0.00156 |
yes |
4.28E-03 |
0.00104 |
yes |
2.98E-03 |
||
Mean |
|
yes |
4.75E-03 |
|
yes |
3.71E-03 |
|
no |
|
||
Standard deviation: |
|
|
5.39E-04 |
|
|
7.00E-04 |
|
|
|
||
Mean of measured values: |
|
4.229E-03 |
|
|
|
|
|
|
|||
Standard deviation: |
|
7.359E-04 |
RSD: |
17.4% |
|
|
|
|
|||
If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.
Calculation results for molecular mass 1334 g/mol:
Calculation Results Experiment 5
Experiment |
5 |
|
|
|
|
|
|
|
|
||
Real Temperature in K |
363.2 |
|
|
|
|
|
|
|
|
||
Real Temperature in °C |
90.0 |
|
|
|
|
|
|
|
|
||
Date of Measurement |
03.10.2018 09:20 |
04.10.2018 11:15 |
05.10.2018 11:00 |
||||||||
Elapsed Time in s |
72300 |
91500 |
81900 |
||||||||
Parameter |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
||
Unit |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
||
Knudsen-cell 1 |
0.00069 |
yes |
1.59E-03 |
0.00041 |
yes |
7.49E-04 |
0.00052 |
yes |
1.06E-03 |
||
Knudsen-cell 2 |
0.00359 |
yes |
8.29E-03 |
0.00043 |
yes |
7.85E-04 |
0.00038 |
yes |
7.75E-04 |
||
Knudsen-cell 3 |
0.00106 |
yes |
2.45E-03 |
0.00054 |
yes |
9.86E-04 |
0.00051 |
yes |
1.04E-03 |
||
Knudsen-cell 4 |
0.00088 |
yes |
2.03E-03 |
0.00039 |
yes |
7.12E-04 |
0.00039 |
yes |
7.95E-04 |
||
Mean |
|
no |
|
|
yes |
8.08E-04 |
|
yes |
9.18E-04 |
||
Standard deviation: |
|
|
|
|
|
1.22E-04 |
|
|
1.54E-04 |
||
Mean of measured values: |
|
8.629E-04 |
|
|
|
|
|
|
|||
Standard deviation: |
|
7.778E-05 |
RSD: |
9.0% |
|
|
|
|
|||
If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.
Calculation Results Experiment 6
Experiment |
6 |
|
|
|
|
|
|
|
|
||
Real Temperature in K |
378.2 |
|
|
|
|
|
|
|
|
||
Real Temperature in °C |
105.0 |
|
|
|
|
|
|
|
|
||
Date of Measurement |
06.10.2018 09:00 |
07.10.2018 08:45 |
08.10.2018 10:45 |
||||||||
Elapsed Time in s |
77400 |
83100 |
91200 |
||||||||
Parameter |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
||
Unit |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
||
Knudsen-cell 1 |
0.00068 |
yes |
1.50E-03 |
0.00080 |
yes |
1.64E-03 |
0.00031 |
yes |
5.79E-04 |
||
Knudsen-cell 2 |
0.00058 |
yes |
1.28E-03 |
0.00073 |
yes |
1.50E-03 |
0.00031 |
yes |
5.79E-04 |
||
Knudsen-cell 3 |
0.00095 |
yes |
2.09E-03 |
0.00107 |
yes |
2.19E-03 |
0.00060 |
yes |
1.12E-03 |
||
Knudsen-cell 4 |
0.00083 |
yes |
1.83E-03 |
0.00083 |
yes |
1.70E-03 |
0.00046 |
yes |
8.60E-04 |
||
Mean |
|
yes |
1.67E-03 |
|
yes |
1.76E-03 |
|
no |
|
||
Standard deviation: |
|
|
3.59E-04 |
|
|
3.03E-04 |
|
|
|
||
Mean of measured values: |
|
1.716E-03 |
|
|
|
|
|
|
|||
Standard deviation: |
|
6.024E-05 |
RSD: |
3.5% |
|
|
|
|
|||
If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.
Calculation Results Experiment 7
Experiment |
7 |
|
|
|
|
|
|
|
|
||
Real Temperature in K |
393.2 |
|
|
|
|
|
|
|
|
||
Real Temperature in °C |
120.0 |
|
|
|
|
|
|
|
|
||
Date of Measurement |
09.10.2018 10:55 |
10.10.2018 11:20 |
11.10.2018 11:00 |
||||||||
Elapsed Time in s |
83100 |
85800 |
82200 |
||||||||
Parameter |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
Weight loss |
to be used |
Vapour pressure |
||
Unit |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
g |
yes/no |
Pa |
||
Knudsen-cell 1 |
0.00171 |
yes |
3.58E-03 |
0.00108 |
yes |
2.19E-03 |
0.00080 |
yes |
1.69E-03 |
||
Knudsen-cell 2 |
0.00140 |
yes |
2.93E-03 |
0.00119 |
yes |
2.41E-03 |
0.00043 |
yes |
9.09E-04 |
||
Knudsen-cell 3 |
0.00178 |
yes |
3.72E-03 |
0.00158 |
yes |
3.20E-03 |
0.00078 |
yes |
1.65E-03 |
||
Knudsen-cell 4 |
0.00182 |
yes |
3.81E-03 |
0.00156 |
yes |
3.16E-03 |
0.00104 |
yes |
2.20E-03 |
||
Mean |
|
yes |
3.51E-03 |
|
yes |
2.74E-03 |
|
no |
|
||
Standard deviation: |
|
|
3.98E-04 |
|
|
5.17E-04 |
|
|
|
||
Mean of measured values: |
|
3.124E-03 |
|
|
|
|
|
|
|||
Standard deviation: |
|
5.436E-04 |
RSD: |
17.4% |
|
|
|
|
|||
If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.
Evaluation
The measured values for temperature and vapour pressure were evaluated as follows:
Evaluation for molecular mass 728 g/mol
Evaluation of Calculated Values
Parameter |
T |
Mean p |
1/T |
log p |
Unit |
K |
Pa |
1/K |
log Pa |
Values |
363.2 |
1.17E-03 |
2.7533E-03 |
-2.9325 |
378.2 |
2.32E-03 |
2.6441E-03 |
-2.6339 |
|
393.2 |
4.23E-03 |
2.5432E-03 |
-2.3737 |
In this table, E-0X represents multiplication with 10-X.
Evaluation for molecular mass 1334 g/mol
Evaluation of Calculated Values
Parameter |
T |
Mean p |
1/T |
log p |
Unit |
K |
Pa |
1/K |
log Pa |
Values |
363.2 |
8.63E-04 |
2.7533E-03 |
-3.0641 |
378.2 |
1.72E-03 |
2.6441E-03 |
-2.7654 |
|
393.2 |
3.12E-03 |
2.5432E-03 |
-2.5052 |
In this table, E-0X represents multiplication with 10-X.
Results
Note: For the calculation of the vapour pressure a molecular mass range of 728 – 1334 g/mol was used.
Test Item with molecular mass 728 g/mol
The following vapour pressures were determined experimentally and considered as valid (mean and standard deviation given):
Experimentally Determined Vapour Pressures
T |
T |
p |
Stand. Dev. p |
RSD p |
°C |
K |
Pa |
Pa |
% |
90.0 |
363.2 |
1.17E-03 |
1.05E-04 |
9.0% |
105.0 |
378.2 |
2.32E-03 |
8.15E-05 |
3.5% |
120.0 |
393.2 |
4.23E-03 |
7.36E-04 |
17.4% |
In this table, E-0X represents multiplication with 10-X.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Results Test Item
Vapour pressure at 20 °C: |
2.09* 10-05Pa |
Vapour pressure at 25 °C: |
2.96* 10-05Pa |
The linear regression of log p vs. 1/T gave a correlation coefficient r of - 0.9999, showing good repeatability and precision. Therefore, the determination is considered as valid.
Test Item with molecular mass 1334 g/mol
The following vapour pressures were determined experimentally and considered as valid (mean and standard deviation given):
Experimentally Determined Vapour Pressures
T |
T |
p |
Stand. Dev. p |
RSD p |
°C |
K |
Pa |
Pa |
% |
90.0 |
363.2 |
8.63E-04 |
7.78E-05 |
9.0% |
105.0 |
378.2 |
1.72E-03 |
6.02E-05 |
3.5% |
120.0 |
393.2 |
3.12E-03 |
5.44E-04 |
17.4% |
In this table, E-0X represents multiplication with 10-X.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Results Test Item
Vapour pressure at 20 °C: |
1.54* 10-05Pa |
Vapour pressure at 25 °C: |
2.19* 10-05Pa |
The linear regression of log p vs. 1/T gave a correlation coefficient r of - 0.9999, showing good repeatability and precision. Therefore, the determination is considered as valid.
Positive Control
For Diethylphthalate the following vapour pressure was determined and compared with recommended value:
Results Positive Control
Vapour pressure (positive control) at 30 °C: |
1.69*10-1Pa |
Criterion for the vapour pressure of the positive control at 30 °C |
0.44*10-1- 2.44*10-1Pa |
The vapour pressure met the validity criteria. Therefore the study can be considered as valid.
Description of key information
Vapour Pressures (Effusion Method) for molecular mass of 728 g/mol
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C:2.09* 10-05Pa
Vapour pressure at 25 °C:2.96* 10-05Pa
Vapour Pressures (Effusion Method) for molecular mass of 1334 g/mol
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C:1.54* 10-05Pa
Vapour pressure at 25 °C:2.19* 10-05Pa
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure ofPetroleum Resins (Kendex 0897)was determined according to OECD 104 resp. EU A.4 using the effusion method (weight loss).
Vapour pressure was examined at seven different temperatures. Threee temperatures could be evaluated as they showed reproducible weight loss. For these temperatures, 1/T was plotted against log (p).
Note: For the calculation of the vapour pressure a molecular mass range of 728 – 1334 g/mol was used.
Vapour Pressures (Effusion Method) for molecular mass of 728 g/mol
Experiment |
T |
Mean p |
Stand. Dev. p |
RSD p |
No. |
K |
Pa |
Pa |
% |
5 |
363.2 |
1.17E-03 |
2.7533E-03 |
-2.9325 |
6 |
378.2 |
2.32E-03 |
2.6441E-03 |
-2.6339 |
7 |
393.2 |
4.23E-03 |
2.5432E-03 |
-2.3737 |
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
The graph 1/T vs. log (P) shows a straight line with a correlation coefficient of - 0.9997.
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C:2.09* 10-05Pa
Vapour pressure at 25 °C:2.96* 10-05Pa
Vapour Pressures (Effusion Method) for molecular mass of 1334 g/mol
Experiment |
T |
Mean p |
Stand. Dev. p |
RSD p |
No. |
K |
Pa |
Pa |
% |
5 |
363.2 |
8.63E-04 |
2.7533E-03 |
-3.0641 |
6 |
378.2 |
1.72E-03 |
2.6441E-03 |
-2.7654 |
7 |
393.2 |
3.12E-03 |
2.5432E-03 |
-2.5052 |
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
The graph 1/T vs. log (P) shows a straight line with a correlation coefficient of - 0.9999.
For the test item Petroleum Resins (Kendex 0897), the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C:1.54* 10-05Pa
Vapour pressure at 25 °C:2.19* 10-05Pa
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