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EC number: 946-144-6 | 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:
- Experimental starting date: 31 May 2017 and Experimental completion date: 02 June 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 30 May 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 23 March 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.005 Pa
- Conclusions:
- The vapor pressure of the test item has been determined to be less than 4.9 x 10-3 Pa at 25 ºC.
- Executive summary:
The vapor pressure of Formaldehyde, reaction products with benzenamine and 4,4'-methylenebis[phenol] has been determined to be less than 4.9 x 10-3Pa at 25 °C, using the vapor pressure balance method designed to be compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
Reference
Results
Recorded temperatures, mass differences and the resulting calculated values of vapor pressure are shown in the following tables:
Run 1
Table 1 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
20 |
293.15 |
0.003411223 |
15.08 |
1.508E-08 |
0.020934903 |
-1.679129037 |
21 |
294.15 |
0.003399626 |
12.95 |
1.295E-08 |
0.017977918 |
-1.745260610 |
22 |
295.15 |
0.003388108 |
11.83 |
1.183E-08 |
0.016423071 |
-1.784545634 |
23 |
296.15 |
0.003376667 |
12.11 |
1.211E-08 |
0.016811783 |
-1.774386236 |
24 |
297.15 |
0.003365304 |
11.84 |
1.184E-08 |
0.016436953 |
-1.784178676 |
25 |
298.15 |
0.003354016 |
12.21 |
1.221E-08 |
0.016950608 |
-1.770814715 |
26 |
299.15 |
0.003342805 |
12.12 |
1.212E-08 |
0.016825665 |
-1.774027759 |
27 |
300.15 |
0.003331667 |
14.37 |
1.437E-08 |
0.019949242 |
-1.700073611 |
28 |
301.15 |
0.003320604 |
14.05 |
1.405E-08 |
0.019505000 |
-1.709854054 |
29 |
302.15 |
0.003309614 |
11.85 |
1.185E-08 |
0.016450836 |
-1.783812028 |
30 |
303.15 |
0.003298697 |
14.70 |
1.470E-08 |
0.020407366 |
-1.690213044 |
No statistical analysis is given due to the nature of the plot.
Run 2
Table 2 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
20 |
293.15 |
0.003411223 |
5.45 |
5.450E-09 |
0.007565996 |
-2.121133876 |
21 |
294.15 |
0.003399626 |
5.94 |
5.940E-09 |
0.008246242 |
-2.083743934 |
22 |
295.15 |
0.003388108 |
5.58 |
5.580E-09 |
0.007746470 |
-2.110896180 |
23 |
296.15 |
0.003376667 |
63.44 |
6.344E-08 |
0.088070973 |
-1.055167204 |
24 |
297.15 |
0.003365304 |
5.41 |
5.410E-09 |
0.007510466 |
-2.124333114 |
25 |
298.15 |
0.003354016 |
5.34 |
5.340E-09 |
0.007413288 |
-2.129989122 |
26 |
299.15 |
0.003342805 |
5.58 |
5.580E-09 |
0.007746470 |
-2.110896180 |
27 |
300.15 |
0.003331667 |
44.88 |
4.488E-08 |
0.062304938 |
-1.205477530 |
28 |
301.15 |
0.003320604 |
7.02 |
7.020E-09 |
0.009745559 |
-2.011193267 |
29 |
302.15 |
0.003309614 |
7.09 |
7.090E-09 |
0.009842736 |
-2.006884144 |
30 |
303.15 |
0.003298697 |
6.24 |
6.240E-09 |
0.008662719 |
-2.062345789 |
No statistical analysis is given due to the nature of the plot.
Run 3
Table 3 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
20 |
293.15 |
0.003411223 |
3.80 |
3.800E-09 |
0.005275374 |
-2.277746782 |
21 |
294.15 |
0.003399626 |
2.99 |
2.990E-09 |
0.004150886 |
-2.381859190 |
22 |
295.15 |
0.003388108 |
2.72 |
2.720E-09 |
0.003776057 |
-2.422961475 |
23 |
296.15 |
0.003376667 |
3.40 |
3.400E-09 |
0.004720071 |
-2.326051462 |
24 |
297.15 |
0.003365304 |
3.41 |
3.410E-09 |
0.004733954 |
-2.324776000 |
25 |
298.15 |
0.003354016 |
3.21 |
3.210E-09 |
0.004456302 |
-2.351025346 |
26 |
299.15 |
0.003342805 |
4.66 |
4.660E-09 |
0.006469274 |
-2.189144462 |
27 |
300.15 |
0.003331667 |
3.93 |
3.930E-09 |
0.005455847 |
-2.263137828 |
28 |
301.15 |
0.003320604 |
4.49 |
4.490E-09 |
0.006233270 |
-2.205284038 |
29 |
302.15 |
0.003309614 |
4.73 |
4.730E-09 |
0.006566452 |
-2.182669238 |
30 |
303.15 |
0.003298697 |
5.02 |
5.020E-09 |
0.006969046 |
-2.156826662 |
No statistical analysis is given due to the nature of the plot.
Run 4
Table 4 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
20 |
293.15 |
0.003411223 |
1.81 |
1.810E-09 |
0.002512744 |
-2.599851804 |
21 |
294.15 |
0.003399626 |
2.80 |
2.800E-09 |
0.003887117 |
-2.410372347 |
22 |
295.15 |
0.003388108 |
2.39 |
2.390E-09 |
0.003317932 |
-2.479132478 |
23 |
296.15 |
0.003376667 |
2.00 |
2.000E-09 |
0.002776512 |
-2.556500383 |
24 |
297.15 |
0.003365304 |
2.34 |
2.340E-09 |
0.003248520 |
-2.488314521 |
25 |
298.15 |
0.003354016 |
2.94 |
2.940E-09 |
0.004081473 |
-2.389183048 |
26 |
299.15 |
0.003342805 |
3.21 |
3.210E-09 |
0.004456302 |
-2.351025346 |
27 |
300.15 |
0.003331667 |
2.56 |
2.560E-09 |
0.003553936 |
-2.449290413 |
28 |
301.15 |
0.003320604 |
3.96 |
3.960E-09 |
0.005497495 |
-2.259835193 |
29 |
302.15 |
0.003309614 |
3.49 |
3.490E-09 |
0.004845014 |
-2.314704952 |
30 |
303.15 |
0.003298697 |
3.29 |
3.290E-09 |
0.004567363 |
-2.340334481 |
No statistical analysis is given due to the nature of the plot.
Discussion
The test item appeared to have softened slightly under the conditions used in the determination.
No statistical analyses were performed because the balance readings were too low and variable for a line of best fit to have any meaning. Instead it was considered more appropriate to impose a regression slope on a chosen data point to provide an estimate of the maximum value for the vapor pressure at 25 ºC.
Run 4 was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 28 ºC (301 K) was chosen because this is the data point which gives the highest estimated vapor pressure at any given temperature when a slope of –1500 K is imposed upon it.
The value of –1500 K is an in-house value and is the shallowest slope observed whilst determining the vapor pressure on a wide range of samples using the vapor pressure balance method. Extrapolation to 25 ºC gave a vapor pressure of 4.90 x 10-3Pa which has been taken as a maximum for this material.
Description of key information
The vapor pressure of Formaldehyde, reaction products with benzenamine and 4,4'-methylenebis[phenol] has been determined to be less than 4.9 x 10-3Pa at 25 °C, using the vapor pressure balance method designed to be compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
Key value for chemical safety assessment
- Vapour pressure:
- 0.005 Pa
- at the temperature of:
- 25 °C
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
