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EC number: 248-957-5 | CAS number: 28313-51-1
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- May 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 guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: Knudsen cell
Test material
- Reference substance name:
- [2-[ethyl[3-methyl-4-[(3-phenyl-1,2,4-thiadiazol-5-yl)azo]phenyl]amino]ethyl]trimethylammonium methyl sulphate
- EC Number:
- 248-957-5
- EC Name:
- [2-[ethyl[3-methyl-4-[(3-phenyl-1,2,4-thiadiazol-5-yl)azo]phenyl]amino]ethyl]trimethylammonium methyl sulphate
- Cas Number:
- 28313-51-1
- Molecular formula:
- C22H29N6S.CH3O4S
- IUPAC Name:
- {2-[ethyl({3-methyl-4-[(E)-2-(3-phenyl-1,2,4-thiadiazol-5-yl)diazen-1-yl]phenyl})amino]ethyl}trimethylazanium methyl sulfate
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
Any other information on results incl. tables
The vapour pressure was measured in the temperature range of 60 °C to 110 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1.After the measurement a mass loss of approximately 8 % (w/w) was determined.
Table1: Measured vapour pressures and corresponding temperatures
Temperature / °C |
Vapour pressure / hPa |
60 |
3.4 × 10-5 |
70 |
3.3 × 10-5 |
80 |
3.9 × 10-5 |
90 |
3.7 × 10-5 |
100 |
5.2 × 10-5 |
110 |
8.7 × 10-5 |
The data point measured at 60 °C was not included in the linear regression because it showed a deviation possibly caused by invotalible impurities.
The following vapour pressure values for the test item were extrapolated from the experimental data (vapour pressure: effusion method):
T / °C |
p / hPa |
p / Pa |
20 |
7.2 × 10-6 |
7.2× 10-4 |
25 |
8.5 × 10-6 |
8.5× 10-4 |
50 |
1.8 × 10-5 |
1.8× 10-3 |
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure at 20°C is ca. 7.2 x 10^-6 hPa.
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