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EC number: 278-601-4 | CAS number: 77061-58-6
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 31July2018-24Dec2018
- 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:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- 2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
- EC Number:
- 278-601-4
- EC Name:
- 2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
- Cas Number:
- 77061-58-6
- Molecular formula:
- C13H18N5.Cl
- IUPAC Name:
- 2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
- Test material form:
- solid: particulate/powder
- Details on test material:
- Batch 1054934
Constituent 1
- Specific details on test material used for the study:
- Identification: Basic red 51
Batch (Lot) Number: 1054934 or 1086207
Expiry date: 29 November 2020 (expiry date) (batch 1054934) or 29 May 2023 (expiry date) (batch 1086207)
Physical Description: Violet powder
Results and discussion
Vapour pressureopen allclose all
- Key result
- Test no.:
- #2
- Temp.:
- 20 °C
- Vapour pressure:
- < 1.3 other: x10-8 Pa
- Remarks on result:
- other: The calculated vapour pressure of the test item was outside the validated range of the method. According to this, the vapour pressure of the test item was determined to be lower than that of benzo(ghi)perylene.
- Key result
- Test no.:
- #1
- Temp.:
- 25 °C
- Vapour pressure:
- < 5.5 other: x10-8 Pa
- Remarks on result:
- other: The calculated vapour pressure of the test item was outside the validated range of the method. According to this, the vapour pressure of the test item was determined to be lower than that of benzo(ghi)perylene.
Transition / decomposition
- Key result
- Transition / decomposition:
- no
Any other information on results incl. tables
A representative weight loss curve of the test item is shown inFigure 1. The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°Cand 25°Care given inTable 1andTable 2.
The plot of the log PTof the test item as function of the reciprocal temperatures is shown inFigure 2. The equation of the curve was: log PT= -8929´1/T + 19.35 (r = 0.995, n = 6).
The calculated vapour pressure of the test item was outside the validated range of the method.According to this, the vapour pressure of the test item was determined to be lower than that of benzo(ghi)perylene. The values are given inTable 3.
Table 1
Results of the Vapour pressure Isothermal TGA Analysis
Temperature |
Weight loss |
νT |
logνT |
logPT |
PT |
||||||
170 |
0.208647 |
2.49´10-5 |
-4.60 |
-0.77 |
0.17 |
||||||
|
0.177892 |
2.12´10-5 |
-4.67 |
-0.86 |
0.14 |
||||||
180 |
0.487360 |
5.82´10-5 |
-4.24 |
-0.30 |
0.50 |
||||||
|
0.452069 |
5.40´10-5 |
-4.27 |
-0.34 |
0.45 |
||||||
190 |
0.933442 |
1.11´10-4 |
-3.95 |
0.06 |
1.1 |
||||||
|
0.939602 |
1.12´10-4 |
-3.95 |
0.06 |
1.1 |
Table 2
Calculated vapour Pressure of the Test Item
Temperature |
logPT |
PT |
PT |
||||
20 |
-11.11 |
7.8´10-12 |
5.9´10-14 |
||||
25 |
-10.60 |
2.5´10-11 |
1.9´10-13 |
Table 3
Vapour pressure of the Test Item
|
20°C |
25°C |
||
|
[Pa] |
[mm Hg] |
[Pa] |
[mm Hg] |
Test item |
< 1.3´10-8 |
< 1.0´10-10 |
< 5.5´10-8 |
< 4.1´10-10 |
1.1. Conclusion
The isothermal TGA effusion method was applied for the determination of the vapour pressure ofBasic red 51.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
|
20°C |
25°C |
||
[Pa] |
[mm Hg] |
[Pa] |
[mm Hg] |
|
Test item |
< 1.3´10-8 |
< 1.0´10-10 |
< 5.5´10-8 |
< 4.1´10-10 |
Applicant's summary and conclusion
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour
pressure of Basic red 51.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
< 1.3 x10-8 Pa
< 1.0 x10-10 mm Hg
25°C
< 5.5 x10-8 Pa
< 4.1 x10-10 mm Hg - Executive summary:
The isothermal TGA effusion method was applied for the determination of the vapour
pressure of Basic red 51.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
< 1.3 x10-8 Pa
< 1.0 x10-10 mm Hg
25°C
< 5.5 x10-8 Pa
< 4.1 x10-10 mm Hg
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