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EC number: 604-453-0 | CAS number: 145022-45-3
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
- Remarks:
- Differential Scanning Calorimetry
Test material
- Reference substance name:
- 1-ethyl-3-methyl-1H-imidazol-3-ium methanesulfonate
- EC Number:
- 604-453-0
- Cas Number:
- 145022-45-3
- Molecular formula:
- C6 H11 N2. C H3 O3 S
- IUPAC Name:
- 1-ethyl-3-methyl-1H-imidazol-3-ium methanesulfonate
- Details on test material:
- Name of test material (as cited in study report): EMIM Methansulfonat
Analytical purity: 99.6 g/100g by 1H-NMR spectroscopy using the internal standard method, molar ratio cation / anion: 49.5 % / 50.5 %
(determined during the GLP-study No. 11L00321 from Competence Center Analytics, BASF SE)
Lot/batch No.: 11-0001
Constituent 1
Results and discussion
Melting / freezing pointopen allclose all
- Melting / freezing pt.:
- 16 °C
- Atm. press.:
- 1 013 hPa
- Remarks on result:
- other: Modification A
- Melting / freezing pt.:
- 33 °C
- Atm. press.:
- 1 013 hPa
- Remarks on result:
- other: Modification B
- Remarks on result:
- other: a glass transition is found at -68°C
Any other information on results incl. tables
Results:
Melting temperature (1st heating)
| Measurement |
Glass transition [°C] |
Peak temperature 1st peak [°C] |
Peak temperature 2nd peak [°C] |
G |
-67.5 | (16.0)2 | (32.4)2 |
| H | -66.7 | (17.2)2 | (not found)2 |
| I | -68.0 | (17.3)2 | (32.4)2 |
| K | (-68.8)1 | 15.9 | 33.3 |
| L | (-69.4)1 | 16.2 | not found |
| mean | -67 | 16 | 33 |
1 Due to the heating rate of 2 K/min not used. 2 Due to the heating rate of 20 K/min not used.
The test item shows crystal modifications. Depending on the crystal modifikation two different melting temperatures were found at 16°C and 33°C.
A glass transitions was found at -67°C in the 1st heating with 20 K/min.
Observed thermic processes:
An exothemic peak at about 0°C peaktemperature shows the recrystallization of the test item.
The estimated accuracy is +/- 1°C.
Applicant's summary and conclusion
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