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EC number: 470-740-0 | CAS number: 29721-79-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Experimental Starting Date: 17 December 2012 Experimental Completion Date: 19 December 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: vapour pressure balance
Test material
- Test material form:
- liquid
Constituent 1
- Specific details on test material used for the study:
- Identification: Hydroxybutyl Methacrylate
Description: clear colorless liquid
Batch: 57821 + MKBH4325V
Purity: 98.5%
Expiry / Retest Date: 02 October 2013
Storage Conditions: approximately 4 °C in the dark
Results and discussion
Vapour pressure
- Temp.:
- 25 °C
- Vapour pressure:
- 10 Pa
Transition / decomposition
- Transition / decomposition:
- no
Any other information on results incl. tables
Results
Recorded temperatures, mass differences and the resulting calculated values of vapor pressure are shown in the following tables. Please see the graphs in Attachment 2 of this Summary.
Run 1
Table 3.1 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
-10 |
263.15 |
0.003800114 |
110.73 |
1.107E-07 |
0.153721609 |
-0.813265079 |
-9 |
264.15 |
0.003785728 |
117.72 |
1.177E-07 |
0.163425520 |
-0.786680125 |
-8 |
265.15 |
0.003771450 |
131.69 |
1.317E-07 |
0.182819459 |
-0.737977581 |
-7 |
266.15 |
0.003757280 |
151.86 |
1.519E-07 |
0.210820586 |
-0.676086983 |
-6 |
267.15 |
0.003743215 |
177.32 |
1.773E-07 |
0.246165589 |
-0.608772656 |
-5 |
268.15 |
0.003729256 |
207.57 |
2.076E-07 |
0.288160339 |
-0.540365793 |
-4 |
269.15 |
0.003715400 |
235.23 |
2.352E-07 |
0.326559506 |
-0.486037670 |
-2 |
271.15 |
0.003687996 |
282.16 |
2.822E-07 |
0.391710369 |
-0.407034932 |
-1 |
272.15 |
0.003674444 |
325.59 |
3.256E-07 |
0.452002336 |
-0.344859321 |
0 |
273.15 |
0.003660992 |
381.30 |
3.813E-07 |
0.529342089 |
-0.276263573 |
A plot of log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 1 gives the following statistical data using an unweighted least squares treatment.
Slope -3.94 x 103
Standard deviation in slope 101
Intercept 14.1
Standard deviation in intercept 0.378
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -3.94 x 103/temp(K) + 14.1
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 0.924.
Run 2
Table 3.2 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
-10 |
263.15 |
0.003800114 |
84.47 |
8.447E-08 |
0.117266001 |
-0.930827885 |
-9 |
264.15 |
0.003785728 |
91.56 |
9.156E-08 |
0.127108738 |
-0.895824595 |
-8 |
265.15 |
0.003771450 |
106.03 |
1.060E-07 |
0.147196805 |
-0.832101617 |
-7 |
266.15 |
0.003757280 |
117.52 |
1.175E-07 |
0.163147868 |
-0.787418596 |
-5 |
268.15 |
0.003729256 |
158.05 |
1.581E-07 |
0.219413892 |
-0.658735879 |
-4 |
269.15 |
0.003715400 |
180.92 |
1.809E-07 |
0.251163311 |
-0.600043800 |
-3 |
270.15 |
0.003701647 |
215.96 |
2.160E-07 |
0.299807809 |
-0.523157060 |
-2 |
271.15 |
0.003687996 |
244.42 |
2.444E-07 |
0.339317580 |
-0.469393639 |
-1 |
272.15 |
0.003674444 |
282.76 |
2.828E-07 |
0.392543323 |
-0.406112406 |
0 |
273.15 |
0.003660992 |
327.99 |
3.280E-07 |
0.455334151 |
-0.341669776 |
A plot of log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 2 gives the following statistical data using an unweighted least squares treatment.
Slope -4.33 x 103
Standard deviation in slope 89.1
Intercept 15.5
Standard deviation in intercept 0.332
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -4.33 x 103/temp(K) + 15.5
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 0.977.
Run 3
Table 3.3 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
-10 |
263.15 |
0.003800114 |
76.18 |
7.618E-08 |
0.105757357 |
-0.975689410 |
-9 |
264.15 |
0.003785728 |
91.26 |
9.126E-08 |
0.126692261 |
-0.897249914 |
-8 |
265.15 |
0.003771450 |
96.55 |
9.655E-08 |
0.134036136 |
-0.872778101 |
-7 |
266.15 |
0.003757280 |
110.93 |
1.109E-07 |
0.153999260 |
-0.812481366 |
-6 |
267.15 |
0.003743215 |
136.39 |
1.364E-07 |
0.189344263 |
-0.722747849 |
-5 |
268.15 |
0.003729256 |
157.15 |
1.572E-07 |
0.218164462 |
-0.661215993 |
-4 |
269.15 |
0.003715400 |
175.13 |
1.751E-07 |
0.243125308 |
-0.614169831 |
-3 |
270.15 |
0.003701647 |
213.57 |
2.136E-07 |
0.296489876 |
-0.527990131 |
-2 |
271.15 |
0.003687996 |
244.22 |
2.442E-07 |
0.339039929 |
-0.469749152 |
-1 |
272.15 |
0.003674444 |
279.16 |
2.792E-07 |
0.387545600 |
-0.411677189 |
0 |
273.15 |
0.003660992 |
318.40 |
3.184E-07 |
0.442020774 |
-0.354557320 |
A plot of log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 3 gives the following statistical data using an unweighted least squares treatment.
Slope -4.53 x 103
Standard deviation in slope 95.5
Intercept 16.2
Standard deviation in intercept 0.356
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -4.53 x 103/temp(K) + 16.2
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 1.04.
Run 4
Table 3.4 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
-10 |
263.15 |
0.003800114 |
71.99 |
7.199E-08 |
0.099940564 |
-1.000258205 |
-9 |
264.15 |
0.003785728 |
83.17 |
8.317E-08 |
0.115461268 |
-0.937563677 |
-8 |
265.15 |
0.003771450 |
97.85 |
9.785E-08 |
0.135840869 |
-0.866969549 |
-7 |
266.15 |
0.003757280 |
109.93 |
1.099E-07 |
0.152611004 |
-0.816414151 |
-6 |
267.15 |
0.003743215 |
132.79 |
1.328E-07 |
0.184346541 |
-0.734365008 |
-5 |
268.15 |
0.003729256 |
153.86 |
1.539E-07 |
0.213597099 |
-0.670404651 |
-4 |
269.15 |
0.003715400 |
178.32 |
1.783E-07 |
0.247553845 |
-0.606330323 |
-3 |
270.15 |
0.003701647 |
201.08 |
2.011E-07 |
0.279150556 |
-0.554161502 |
-2 |
271.15 |
0.003687996 |
241.12 |
2.411E-07 |
0.334736335 |
-0.475297144 |
-1 |
272.15 |
0.003674444 |
277.46 |
2.775E-07 |
0.385185565 |
-0.414329997 |
0 |
273.15 |
0.003660992 |
321.20 |
3.212E-07 |
0.445907891 |
-0.350754842 |
A plot of log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 4 gives the following statistical data using an unweighted least squares treatment.
Slope -4.68 x 103
Standard deviation in slope 42.6
Intercept 16.8
Standard deviation in intercept 0.159
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -4.68 x 103/temp(K) + 16.8
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 1.08.
Summary of Results
The values of vapor pressure at 25 °C extrapolated from each graph are summarized in the following table:
Table 3.5 – Summary of Vapor Pressure Data
Run |
Log10[Vp(25 ºC)] |
1 |
0.924 |
2 |
0.977 |
3 |
1.04 |
4 |
1.08 |
Mean |
1.006 |
Vapor Pressure |
10.1 Pa |
The test item did not change in appearance under the conditions used in the determination.
Applicant's summary and conclusion
- Conclusions:
- The vapor pressure of the test item has been determined to be 10 Pa at 25 ºC.
- Executive summary:
The determination was carried out using a procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008.
Instrument: Vapor pressure balance.
Summary of Results
The values of vapor pressure at 25 °C extrapolated from each graph are summarized in the following table:
Table 3.5 – Summary of Vapor Pressure Data
Run
Log10[Vp(25 ºC)]
1
0.924
2
0.977
3
1.04
4
1.08
Mean
1.006
Vapor Pressure
10.1 Pa
The test item did not change in appearance under the conditions used in the determination.
Discussion
A total of four runs were completed for the main sequence. Equilibrium with regard to vapor pressure was assessed to have been reached over the four runs. Thus all four runs have been used to calculate the definitive vapor pressure value for the test item.
The un-shaded points on Runs 1 and 2 have not been used as they are considered erroneous possible due to external interference (vibration) of the balance.
Conclusion
The vapor pressure of the test item has been determined to be 10 Pa at 25 ºC.
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