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EC number: 616-081-6 | CAS number: 743423-33-8
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Remarks:
- Because the metling point of the substance is between 200 and 300°C, a recognized calculation method (Modified Watson Correlation method) is sufficient according to the information requirements in Annex VII.
- Adequacy of study:
- key study
- Study period:
- 2017-2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- March 23, 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- March 04, 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- August 1996
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- sodium;2-hexadecylsulfanyl-1H-benzimidazole-5-sulfonate
- EC Number:
- 616-081-6
- Cas Number:
- 743423-33-8
- Molecular formula:
- C23 H37 N2 Na O3 S2
- IUPAC Name:
- sodium;2-hexadecylsulfanyl-1H-benzimidazole-5-sulfonate
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- < 0 Pa
- Temp.:
- 20 °C
- Vapour pressure:
- < 0 mm Hg
- Temp.:
- 25 °C
- Vapour pressure:
- < 0 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- < 0 mm Hg
Any other information on results incl. tables
The results are given in Table 2.
During both measurements, no significant weight lost was observed. A log pversus1/T curve for the test item in the range of 200°C and 230°C could not be determined.The coefficient of correlation (r) was < 0.99.
The weight losses were compared with the results of benzo(ghi)perylene at the same temperatures. The weight loss curve of this reference substance is shown inFigure 6.
Table 2
Results of the Vapour pressure Isothermal TGA Analysis
Temperature |
Weight loss |
νT |
logνT |
logPT |
PT |
200 |
0.240289 |
2.87´10-5 |
-4.54 |
-0.68 |
0.21 |
|
0.141104 |
1.38´10-5 |
-4.77 |
-0.97 |
0.11 |
210 |
0.285736 |
3.41´10-5 |
-4.47 |
-0.58 |
0.26 |
|
0.182399 |
2.18´10-5 |
-4.66 |
-0.83 |
0.15 |
220 |
0.357096 |
4.26´10-5 |
-4.37 |
-0.46 |
0.35 |
|
0.257218 |
3.07´10-5 |
-4.51 |
-0.64 |
0.23 |
230 |
0.570403 |
6.81´10-5 |
-4.17 |
-0.20 |
0.64 |
|
0.386911 |
4.62´10-5 |
-4.34 |
-0.41 |
0.39 |
Applicant's summary and conclusion
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of V182675.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was < 1.3 * 10^-8 and < 7.2 * 10^-8 Pa, respectively.
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