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EC number: 843-143-1 | CAS number: 709647-81-4
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:
- From 25 March 2020 to 03 April 2020
- 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:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of Inspection: 21 August 2018, Date of Issue of Certificate: 19 November 2018
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Test no.:
- #1
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapor pressure of the test item has been determined to be 6.91E-09 Pa at 25 °C.
- Executive summary:
The vapor pressure of the test item has been determined to be 6.91 x 10-9 Pa 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
The test item appeared to dry out under vaccuum determination.
A total of 10 runs were started for the main sequence. Runs 5 to 10 have been deemed to have reached equilibrium and therefore utilised to show the general vapour pressure trendline and to calculate the final vapour pressure result. Runs 1 to 4 have not been utilisesd as equilibrium had not been reached.
The results be represent rounded values obtained by calculations based on the exact raw data.
Recorded temperatures, mass differences and the resulting calculated values of vapour pressure are shown in the following tables:
Run 5
Temperature (°C) | Temperature (K) | Reciprocal Temperature (K-1) | Mass Difference (µg) | Mass Difference (kg) | Vapour Pressure (Pa) | Log10 Vp |
110 | 383.15 | 0.002610 | 32.57 | 3.257e-08 | 0.04522 | -1.34467 |
111 | 384.15 | 0.002603 | 38.29 | 3.829e-08 | 0.05316 | -1.27442 |
112 | 385.15 | 0.002596 | 76.42 | 7.642e-08 | 0.10609 | -0.97433 |
113 | 386.15 | 0.002590 | 49.72 | 4.972e-08 | 0.06902 | -1.16103 |
114 | 387.15 | 0.002583 | 57.70 | 5.770e-08 | 0.08010 | -1.09637 |
115 | 388.15 | 0.002576 | 93.97 | 9.397e-08 | 0.13045 | -0.88456 |
116 | 389.15 | 0.002570 | 159.97 | 1.600e-07 | 0.22208 | -0.65349 |
117 | 390.15 | 0.002563 | 150.95 | 1.510e-07 | 0.20956 | -0.67869 |
118 | 391.15 | 0.002557 | 67.01 | 6.701e-08 | 0.09303 | -1.03138 |
119 | 392.15 | 0.002550 | 91.82 | 9.182e-08 | 0.12747 | -0.89459 |
120 | 393.15 | 0.002544 | 124.1 | 1.241e-07 | 0.17228 | -0.76377 |
A plot of Log10 (vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 5 gives the following statistical data using an unweighted least squares treatment.
Slope: -7.85 x 103
Standard error in slope:2.33 x 103
Intercept: 19.3
Standard error in intercept: 6.00
The results obtained indicate the following vapor pressure relationship:
Log10 (Vp (Pa)) = -7.85 x 103/temp(K) + 19.3
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -7.08.
Run 6
Table 2 - Vapour Pressure Data
Temperature (°C) | Temperature (K) | Reciprocal Temperature (K-1) | Mass Difference (µg) | Mass Difference (kg) | Vapour Pressure (Pa) | Log10 Vp |
110 | 383.15 | 0.002610 | 44.40 | 4.440e-08 | 0.06164 | -1.21014 |
111 | 384.15 | 0.002603 | 39.24 | 3.924e-08 | 0.05448 | -1.26376 |
112 | 385.15 | 0.002596 | 92.41 | 9.241e-08 | 0.12829 | -0.89181 |
113 | 386.15 | 0.002590 | 65.18 | 6.518e-08 | 0.09049 | -1.04340 |
114 | 387.15 | 0.002583 | 69.22 | 6.992e-08 | 0.09610 | -1.01728 |
115 | 388.15 | 0.002576 | 233.99 | 2.340e-07 | 0.32484 | -0.48833 |
116 | 389.15 | 0.002570 | 78.27 | 7.827e-08 | 0.10866 | -0.96393 |
117 | 390.15 | 0.002563 | 276.61 | 2.766e-07 | 0.38401 | -0.41566 |
118 | 391.15 | 0.002557 | 117.93 | 1.179e-07 | 0.16372 | -0.78590 |
119 | 392.15 | 0.002550 | 141.79 | 1.418e-07 | 0.19684 | -0.70589 |
120 | 393.15 | 0.002544 | 151.66 | 1.517e-07 | 0.21054 | -0.67667 |
A plot of Log10 (vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 6 gives the following statistical data using an unweighted least squares treatment.
Slope: -9.09 x 103
Standard error in slope:2.88 x 103
Intercept: 22.5
Standard error in intercept: 7.43
The results obtained indicate the following vapor pressure relationship:
Log10 (Vp (Pa)) = -9.09 x 103/temp(K) + 22.5
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -7.92.
Run 7
Table 3 - Vapour Pressure Data
Temperature (°C) | Temperature (K) | Reciprocal Temperature (K-1) | Mass Difference (µg) | Mass Difference (kg) | Vapour Pressure (Pa) | Log10 Vp |
110 | 383.15 | 0.002610 | 61.11 | 6.111e-08 | 0.08484 | -1.07140 |
111 | 384.15 | 0.002603 | 41.78 | 4.178e-08 | 0.05800 | -1.23657 |
112 | 385.15 | 0.002596 | 69.25 | 6.925e-08 | 0.09614 | -1.01710 |
113 | 386.15 | 0.002590 | 119.92 | 1.199e-07 | 0.16648 | -0.77864 |
114 | 387.15 | 0.002583 | 188.97 | 1.890e-07 | 0.26234 | -0.58114 |
115 | 388.15 | 0.002576 | 55.35 | 5.535e-08 | 0.07684 | -1.11441 |
116 | 389.15 | 0.002570 | 169.21 | 1.692e-07 | 0.23491 | -0.62910 |
117 | 390.15 | 0.002563 | 69.18 | 6.918e-08 | 0.09604 | -1.01755 |
118 | 391.15 | 0.002557 | 312.41 | 3.124e-07 | 0.43371 | -0.36280 |
120 | 392.15 | 0.002550 | 185.26 | 1.853e-07 | 0.25719 | -0.58975 |
A plot of Log10 (vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 7 gives the following statistical data using an unweighted least squares treatment.
Slope: -8.83 x 103
Standard error in slope: 3.71 x 103
Intercept: 21.9
Standard error in intercept: 9.56
The results obtained indicate the following vapor pressure relationship:
Log10 (Vp (Pa)) = -8.83 x 103/temp(K) + 21.9
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -7.68.
Run 8
Table 4 - Vapour Pressure Data
Temperature (°C) | Temperature (K) | Reciprocal Temperature (K-1) | Mass Difference (µg) | Mass Difference (kg) | Vapour Pressure (Pa) | Log10 Vp |
110 | 383.15 | 0.002610 | 34.57 | 3.457e-08 | 0.04799 | -1.31885 |
111 | 384.15 | 0.002603 | 76.07 | 7.607e-08 | 0.10560 | -0.97634 |
112 | 385.15 | 0.002596 | 36.82 | 3.682e-08 | 0.05112 | -1.29141 |
113 | 386.15 | 0.002590 | 70.07 | 7.007e-08 | 0.09728 | -1.01198 |
114 | 387.15 | 0.002583 | 57.14 | 5.714e-08 | 0.07932 | -1.10062 |
115 | 388.15 | 0.002576 | 56.53 | 5.653e-08 | 0.07848 | -1.10524 |
116 | 389.15 | 0.002570 | 141.61 | 1.416e-07 | 0.19659 | -0.70644 |
117 | 390.15 | 0.002563 | 133.62 | 1.336e-07 | 0.18550 | -0.73166 |
118 | 391.15 | 0.002557 | 164.31 | 1.643e-07 | 0.22810 | -0.64187 |
119 | 392.15 | 0.002550 | 191.47 | 1.915e-07 | 0.26581 | -0.57543 |
120 | 392.15 | 0.002550 | 175.54 | 1.755e-07 | 0.24369 | -0.61316 |
A plot of Log10 (vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 8 gives the following statistical data using an unweighted least squares treatment.
Slope: -1.10 x 104
Standard error in slope: 1.95 x 103
Intercept: 27.5
Standard error in intercept: 5.01
The results obtained indicate the following vapor pressure relationship:
Log10 (Vp (Pa)) = -1.10 x 104/temp(K) + 27.5
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -9.49.
Run 9
Table 5 - Vapour Pressure Data
Temperature (°C) | Temperature (K) | Reciprocal Temperature (K-1) | Mass Difference (µg) | Mass Difference (kg) | Vapour Pressure (Pa) | Log10 Vp |
110 | 383.15 | 0.002610 | 34.31 | 3.431e-08 | 0.04763 | -1.32212 |
111 | 384.15 | 0.002603 | 60.36 | 6.036e-08 | 0.08380 | -1.07676 |
112 | 385.15 | 0.002596 | 51.74 | 5.174e-08 | 0.07183 | -1.14369 |
113 | 386.15 | 0.002590 | 70.91 | 7.091e-08 | 0.09844 | -1.00683 |
114 | 387.15 | 0.002583 | 182.87 | 1.829e-07 | 0.25387 | -0.59539 |
115 | 388.15 | 0.002576 | 41.76 | 4.176e-08 | 0.05797 | -1.23680 |
116 | 389.15 | 0.002570 | 68.96 | 6.896e-08 | 0.09573 | -1.01895 |
117 | 390.15 | 0.002563 | 96.66 | 9.666e-08 | 0.13419 | -0.87228 |
118 | 391.15 | 0.002557 | 83.41 | 8.341e-08 | 0.11579 | -0.93633 |
119 | 392.15 | 0.002550 | 93.19 | 9.319e-08 | 0.12937 | -0.88817 |
120 | 392.15 | 0.002550 | 223.48 | 2.235e-07 | 0.31025 | -0.50829 |
A plot of Log10 (vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 9 gives the following statistical data using an unweighted least squares treatment.
Slope: -7.26 x 103
Standard error in slope: 2.88 x 103
Intercept: 17.7
Standard error in intercept: 7.43
The results obtained indicate the following vapor pressure relationship:
Log10 (Vp (Pa)) = -7.26 x 103/temp(K) + 17.7
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -6.61.
Run 10
Table 6 - Vapour Pressure Data
Temperature (°C) | Temperature (K) | Reciprocal Temperature (K-1) | Mass Difference (µg) | Mass Difference (kg) | Vapour Pressure (Pa) | Log10 Vp |
110 | 383.15 | 0.002610 | 30.90 | 3.090e-08 | 0.04290 | -1.36754 |
111 | 384.15 | 0.002603 | 42.24 | 4.224e-08 | 0.05864 | -1.23181 |
112 | 385.15 | 0.002596 | 31.64 | 3.164e-08 | 0.04392 | -1.35734 |
113 | 386.15 | 0.002590 | 44.18 | 4.418e-08 | 0.06133 | -1.21233 |
114 | 387.15 | 0.002583 | 41.58 | 4.158e-08 | 0.05772 | -1.23867 |
115 | 388.15 | 0.002576 | 97.50 | 9.570e-08 | 0.13535 | -0.86854 |
116 | 389.15 | 0.002570 | 77.47 | 7.747e-08 | 0.10755 | -0.96839 |
117 | 390.15 | 0.002563 | 79.63 | 7.963e-08 | 0.11055 | -0.95644 |
118 | 391.15 | 0.002557 | 109.69 | 1.097e-07 | 0.15228 | -0.81736 |
119 | 392.15 | 0.002550 | 168.79 | 1.668e-07 | 0.23432 | -0.63019 |
120 | 392.15 | 0.002550 | 172.85 | 1.729e-07 | 0.23996 | -0.61986 |
A plot of Log10 (vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 10 gives the following statistical data using an unweighted least squares treatment.
Slope: -1.18 x 104
Standard error in slope: 1.39 x 103
Intercept: 29.3
Standard error in intercept: 3.57
The results obtained indicate the following vapor pressure relationship:
Log10 (Vp (Pa)) = -1.18 x 104/temp(K) + 29.3
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -10.2.
Table 7 - Summary of Vapour Pressure Data
Run | Log10 [Vp(25°C)] |
5 | -7.08 |
6 | -7.92 |
7 | -7.68 |
8 | -9.49 |
9 | -6.61 |
10 | -10.2 |
Mean | -8.16 |
Description of key information
6.19 x 10-9 Pa at 25°C; OECD 104; Fox, A. J. (2020)
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
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