Registration Dossier
Registration Dossier
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EC number: 277-232-6 | CAS number: 73019-09-7
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2012-10-05 to 2013-01-09
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential Scanning Calorimetry (DSC)
Test material
- Reference substance name:
- 2-[[(4-methoxyphenyl)methylhydrazono]methyl]-1,3,3-trimethyl-3H-indolium methyl sulphate
- EC Number:
- 258-946-7
- EC Name:
- 2-[[(4-methoxyphenyl)methylhydrazono]methyl]-1,3,3-trimethyl-3H-indolium methyl sulphate
- Cas Number:
- 54060-92-3
- Molecular formula:
- C20H24N3O.CH3O4S C21H27N3O5S
- IUPAC Name:
- 2-{[2-(4-methoxyphenyl)-2-methylhydrazin-1-ylidene]methyl}-1,3,3-trimethyl-3H-indol-1-ium methyl sulfate
- Test material form:
- solid
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- > 111 - < 159 °C
- Atm. press.:
- ca. 1 013 hPa
- Decomposition:
- yes
- Decomp. temp.:
- > 175 - < 265 °C
Any other information on results incl. tables
Thermal Stability (DSC)
The DSC-measurement in a closed glass crucible with the test item showed a two-stage endothermal effect in the temperature range of 100- 155 °C. An exothermal was observed in the temperature range of 175 - 260 °C with an energy of 583 J/g.
Melting Point / Boiling Point / (DSC and capillary measurement)
A DSC-run up to 300 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 85 - 160 °C and an exothermal effect in the temperature range of 175 - 265 °C. An optical inspection showed a black residue.
Two DSC-runs up to 200 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 95 - 155 °C and an exothermal effect in the temperature range of 175 - 265 °C. The test item appeared dark and melted after the measurement. Due to the broad shape of the endothermic signals no onset temperatures can be identified as a melting point. ln order to clarify the results of the DSC measurements an additional measurement with the capillary method was performed.
Due to the results of the capillary measurements it is concluded that the test item has a melting range of approx. 111 - 159 °C.
Applicant's summary and conclusion
- Conclusions:
- In conclusion, due to the results of the capillary measurements it is concluded that the test item has a melting range of approx. 111 - 159 °C.
- Executive summary:
The melting temperature of the test substance was determined using differential scanning calorimetry (DSC). First , a thermal stability measurement (DSC) in a closed glass crucible with the test item showed a two-stage endothermal effect in the temperature range of 100- 155 °C. An exothermal was observed in the temperature range of 175 - 260 °C with an energy of 583 J/g.
Afterwards, a DSC-run up to 300 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 85 - 160 °C and an exothermal effect in the temperature range of 175 - 265 °C. An optical inspection showed a black residue. Two DSC-runs up to 200 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 95 - 155 °C and an exothermal effect in the temperature range of 175 - 265 °C. The test item appeared dark and melted after the measurement. Due to the broad shape of the endothermic signals no onset temperatures can be identified as a melting point.
ln order to clarify the results of the DSC measurements an additional measurement with the capillary method was performed.
Due to the results of the capillary measurements it is concluded that the test item has a melting range of approx. 111 - 159 °C.
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