Registration Dossier
Registration Dossier
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EC number: 444-960-2 | CAS number: 39148-16-8
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:
- 23 Mar - 27 Apr 2001
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Hessisches Ministerium für Umwelt, Energie, Jugend, Familie und Gesundheit, Wiesbaden
- Type of method:
- other: differential scanning calorimetry confirmed by capillary method
- Melting / freezing pt.:
- > 250 °C
- Atm. press.:
- 1 013.3 hPa
- Decomposition:
- yes
- Decomp. temp.:
- > 250 °C
- Remarks on result:
- other: no melting point determined up to 250 °C under normal pressure
Reference
In aluminium pans with a hole, there were indicated three endothermic effects, a first one in the temperature range 70 - 85 °C, a second one from 120 to 155 °C, and a third one from 175 to 205 °C. An exothermal decomposition of the test substance starts at approximately 250 °C. The endothermic effects are caused by an endothermic transformation process of the test substance and not by a melting process. No melting point was observed according to the capillary method up to a temperature of 250 °C. Thus, neither a melting point nor a melting range was confirmed to exist in the investigated temperature range.
Description of key information
> 250 °C (decomposition) at 1013.3 hPa
Key value for chemical safety assessment
Additional information
The melting behaviour of the substance was investigated in accordance with OECD Guideline 102 and EU Method A.1 using differential scanning calorimetry. Three endothermic effects observed in the range between 70 °C and 205 °C were interpreted as being caused by an endothermic transformation process of the substance, and not by a melting process. Exothermal decomposition of the substance started at 250 °C. The capillary experiment confirmed the non-existence of the melting point up to 250 °C.
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