Registration Dossier
Registration Dossier
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EC number: 821-762-8 | CAS number: 4563-56-8
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:
- 08 May - 12 May 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to other study
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted in 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- adopted in 2008
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Ministerium für Arbeit, Integration und Soziales des Landes Nordrhein-Westfalen, Düsseldorf, Germany
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- Storage conditions: at room temperature; tightly closed; dry
- Melting / freezing pt.:
- -17 °C
- Atm. press.:
- ca. 1 013 hPa
Reference
Results
Four steps were registered in the preliminary test, with maxima at 259,
318, 416 and 486 °C. A total mass loss of 78.3% at the final temperature
could be seen (mass change until 365 °C: -72.3%; mass change in the
range 365 – 596 °C: -6.0%). No significant mass loss occurred due to
purging. After cooling, a black coating was visible on the inner sides
of the crucible and the lid.
The test item was cooled down slowly to -150 °C with controlled cooling rates (2K). The heat flow curve showed a sharp endothermic peak with a maximum temperature at -13 °C caused by melting. Its extrapolated onset temperature (-17.20 and -17.18 °C, respectively) indicates the melting temperature, rounded mean value: -17 °C.
Reweighing after the measurement showed that the sample had lost ca. 0.4% of its mass (0.5% and 0.3%, respectively). The residues looked unchanged.
Description of key information
-17 °C at 1013 hPa (OECD 102, DSC)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -17 °C
Additional information
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