Registration Dossier
Registration Dossier
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EC number: 228-491-9 | CAS number: 6281-42-1
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-11-06 until 2016-05-31
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 46.7 - < 58.6 °C
- Atm. press.:
- 1 013 hPa
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The melting range of the test item is 46.7 to 58.6°C.
- Executive summary:
The melting point of the test item was determined according EU Method A.1 and under GLP. No deviation from the guideline was observed during the study.
The melting range is 46.7 to 58.6°C.
Reference
Test C
Endothermic events:
- Onset T = 8.81°C, heat of melting 29.58 J/g
- Onset T = 46.66°C, heat of melting 33.78 J/g
Test D
Endothermic events:
- Onset T = 8.80°C, heat of melting 58.61 J/g
- Onset T = 58.61°C, heat of melting 27.80 J/g
Based on Sponsor information and visual observations, the test item is a solid containing a non-negligible liquid phase. Indeed, at ambient temperature, the test item is super cooled. On completion of testing a brown residue remained. A visual analysis confirmed that the sample melted gradually into a clear liquid between 20°C (ambient) and ~30°C. As a result the first endothermic peak observed during the DSC analysis is probably not due to the melting of the test item, but rather to the super cooling of the sample. This conclusion is supported by the observation of a clear liquid phase at 20 to ~ 30°C. The second endothermic event is therefore highly suspected to correspond to melting. In conclusion, the melting range is 46.7 to 58.6°C.
Description of key information
The melting point of the test item was determined according EU Method A.1 and under GLP. No deviation from the guideline was observed during the study.
The melting range is 46.7 to 58.6°C.
Key value for chemical safety assessment
Additional information
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