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EC number: 813-543-0 | CAS number: 73984-93-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Experimental starting date: 5 January 2018 Experimental completion date: 12 January 2018
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes
- Type of method:
- effusion method: vapour pressure balance
Test material
- Reference substance name:
- 1,3,4-Thiadiazole-2(3H)-thione, 5-(tert-dodecyldithio)-
- EC Number:
- 813-543-0
- Cas Number:
- 73984-93-7
- Molecular formula:
- C14H26N2S4
- IUPAC Name:
- 1,3,4-Thiadiazole-2(3H)-thione, 5-(tert-dodecyldithio)-
- Test material form:
- liquid
- Details on test material:
- - Storage: in a sealed container at room temperature
Constituent 1
- Specific details on test material used for the study:
- Information as provided by the Sponsor. The Certificate of Analysis provided by the Sponsor is attached (Please see Attachment Section of this Summary).
Identification: A-153
Appearance/Physical state: pale yellow viscous liquid
Batch: B16001086
Purity: UVCB Substance (treat as 100%)
Expiry date: 01 March 2018
Storage conditions: room temperature, in the dark
Results and discussion
Vapour pressure
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
Any other information on results incl. tables
Results
Please see the Attachment Section of this report for Figures 2 to 5 Graphs of Log10Vapor Pressure vs Reciprocal Temperature Runs 2 to 5.
Recorded temperatures, mass differences and the resulting calculated values of vapor pressure are shown in the following tables:
Run 6
Table 1 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
85 |
358.15 |
0.0027921 |
19.20 |
1.920E-08 |
0.0266545 |
-1.574229 |
86 |
359.15 |
0.0027844 |
22.01 |
2.201E-08 |
0.0305555 |
-1.514910 |
87 |
360.15 |
0.0027766 |
22.52 |
2.252E-08 |
0.0312635 |
-1.504962 |
88 |
361.15 |
0.0027689 |
26.28 |
2.628E-08 |
0.0364834 |
-1.437905 |
89 |
362.15 |
0.0027613 |
28.99 |
2.899E-08 |
0.0402455 |
-1.395282 |
90 |
363.15 |
0.0027537 |
32.23 |
3.223E-08 |
0.0447435 |
-1.349270 |
91 |
364.15 |
0.0027461 |
35.67 |
3.567E-08 |
0.0495191 |
-1.305227 |
92 |
365.15 |
0.0027386 |
39.02 |
3.902E-08 |
0.0541698 |
-1.266243 |
93 |
366.15 |
0.0027311 |
43.16 |
4.316E-08 |
0.0599171 |
-1.222449 |
94 |
367.15 |
0.0027237 |
46.56 |
4.656E-08 |
0.0646372 |
-1.189517 |
95 |
368.15 |
0.0027163 |
52.37 |
5.237E-08 |
0.0727030 |
-1.138448 |
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: |
-5.71 x 103 |
Standard error in slope: |
113
|
Intercept: |
14.4 |
Standard error in intercept: |
0.311 |
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -5.71 x 103/temp(K) + 14.4
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -4.78.
Run 7
Table 2 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
85 |
358.15 |
0.0027921 |
18.34 |
1.834e-08 |
0.0254606 |
-1.594131 |
86 |
359.15 |
0.0027844 |
20.21 |
2.021e-08 |
0.0280567 |
-1.551964 |
87 |
360.15 |
0.0027766 |
22.27 |
2.227e-08 |
0.0309165 |
-1.509810 |
88 |
361.15 |
0.0027689 |
25.73 |
2.573e-08 |
0.0357198 |
-1.447091 |
89 |
362.15 |
0.0027613 |
27.09 |
2.709e-08 |
0.0376079 |
-1.424721 |
90 |
363.15 |
0.0027537 |
29.67 |
2.967e-08 |
0.0411896 |
-1.385213 |
91 |
364.15 |
0.0027461 |
32.30 |
3.230e-08 |
0.0448407 |
-1.348328 |
92 |
365.15 |
0.0027386 |
36.15 |
3.615e-08 |
0.0501855 |
-1.299422 |
93 |
366.15 |
0.0027311 |
42.20 |
4.220e-08 |
0.0585844 |
-1.232218 |
94 |
367.15 |
0.0027237 |
46.96 |
4.696e-08 |
0.0651925 |
-1.185802 |
95 |
368.15 |
0.0027163 |
50.30 |
5.030e-08 |
0.0698293 |
-1.155962 |
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: |
-5.82 x 103 |
Standard error in slope: |
147
|
Intercept: |
14.7 |
Standard error in intercept: |
0.405 |
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -5.82 x 103/temp(K) + 14.7
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -4.87.
Run 8
Table 3 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
85 |
358.15 |
0.0027921 |
17.21 |
1.721e-08 |
0.0238919 |
-1.621750 |
86 |
359.15 |
0.0027844 |
20.23 |
2.023e-08 |
0.0280844 |
-1.551534 |
87 |
360.15 |
0.0027766 |
22.07 |
2.207e-08 |
0.0306388 |
-1.513728 |
88 |
361.15 |
0.0027689 |
24.17 |
2.417e-08 |
0.0335542 |
-1.474254 |
89 |
362.15 |
0.0027613 |
26.11 |
2.611e-08 |
0.0362474 |
-1.440724 |
90 |
363.15 |
0.0027537 |
28.86 |
2.886e-08 |
0.0400651 |
-1.397234 |
91 |
364.15 |
0.0027461 |
33.46 |
3.346e-08 |
0.0464511 |
-1.333004 |
92 |
365.15 |
0.0027386 |
36.53 |
3.653e-08 |
0.0507130 |
-1.294881 |
93 |
366.15 |
0.0027311 |
40.73 |
4.073e-08 |
0.0565437 |
-1.247616 |
94 |
367.15 |
0.0027237 |
45.76 |
4.576e-08 |
0.0635266 |
-1.197044 |
95 |
368.15 |
0.0027163 |
49.04 |
4.904e-08 |
0.0680801 |
-1.166980 |
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: |
-5.94 x 103 |
Standard error in slope: |
118
|
Intercept: |
15.0 |
Standard error in intercept: |
0.326 |
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -5.94 x 103/temp(K) + 15.0
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -4.95.
Run 9
Table 4 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
85 |
358.15 |
0.0027921 |
17.36 |
1.736e-08 |
0.0241001 |
-1.617981 |
86 |
359.15 |
0.0027844 |
20.18 |
2.018e-08 |
0.0280150 |
-1.552609 |
87 |
360.15 |
0.0027766 |
21.72 |
2.172e-08 |
0.0301529 |
-1.520671 |
88 |
361.15 |
0.0027689 |
22.66 |
2.266e-08 |
0.0314579 |
-1.502270 |
89 |
362.15 |
0.0027613 |
25.49 |
2.549e-08 |
0.0353867 |
-1.451161 |
90 |
363.15 |
0.0027537 |
28.76 |
2.876e-08 |
0.0399262 |
-1.398742 |
91 |
364.15 |
0.0027461 |
32.11 |
3.211e-08 |
0.0445769 |
-1.350890 |
92 |
365.15 |
0.0027386 |
35.53 |
3.553e-08 |
0.0493247 |
-1.306935 |
93 |
366.15 |
0.0027311 |
38.28 |
3.828e-08 |
0.0531424 |
-1.274558 |
94 |
367.15 |
0.0027237 |
43.45 |
4.345e-08 |
0.0603197 |
-1.219541 |
95 |
368.15 |
0.0027163 |
48.56 |
4.856e-08 |
0.0674137 |
-1.171252 |
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: |
-5.75 x 103 |
Standard error in slope: |
140
|
Intercept: |
14.4 |
Standard error in intercept: |
0.385 |
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -5.75 x 103/temp(K) + 14.4
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -4.85.
Run 10
Table 4 – Vapor Pressure Data
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapor Pressure (Pa) |
Log10Vp |
85 |
358.15 |
0.0027921 |
17.32 |
1.732e-08 |
0.0240446 |
-1.618982 |
86 |
359.15 |
0.0027844 |
18.89 |
1.889e-08 |
0.0262242 |
-1.581298 |
87 |
360.15 |
0.0027766 |
20.91 |
2.091e-08 |
0.0290284 |
-1.537176 |
88 |
361.15 |
0.0027689 |
23.53 |
2.353e-08 |
0.0326657 |
-1.485908 |
89 |
362.15 |
0.0027613 |
26.25 |
2.625e-08 |
0.0364417 |
-1.438401 |
90 |
363.15 |
0.0027537 |
28.90 |
2.890e-08 |
0.0401206 |
-1.396633 |
91 |
364.15 |
0.0027461 |
31.76 |
3.176e-08 |
0.0440910 |
-1.3556450 |
92 |
365.15 |
0.0027386 |
34.38 |
3.438e-08 |
0.0477282 |
-1.321225 |
93 |
366.15 |
0.0027311 |
40.22 |
4.022e-08 |
0.0558357 |
-1.253088 |
94 |
367.15 |
0.0027237 |
42.50 |
4.250e-08 |
0.0590009 |
-1.229141 |
95 |
368.15 |
0.0027163 |
48.30 |
4.830e-08 |
0.0670528 |
-1.173583 |
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: |
-5.87 x 103 |
Standard error in slope: |
88.9
|
Intercept: |
14.8 |
Standard error in intercept: |
0.245 |
The results obtained indicate the following vapor pressure relationship:
Log10(Vp (Pa)) = -5.87 x 103/temp(K) + 14.8
The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of -4.92.
The values of vapor pressure at 25 °C extrapolated from each graph are summarized in the following table:
Table 5 Summary of Vapor Pressure Data
Run |
Log10[Vp(25 ºC)] |
6 |
-4.78 |
7 |
-4.87 |
8 |
-4.95 |
9 |
-4.85 |
10 |
-4.92 |
Mean |
-4.87 |
| Vapor Pressure | 1.34 x 10 -5Pa |
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 1.3 x 10-5 Pa at 25 ºC.
- Executive summary:
The determination was carried out using a procedure 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.
Conclusion
The vapor pressure of the test item has been determined to be 1.3 x 10 -5Pa at 25 ºC.
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