Registration Dossier
Registration Dossier
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EC number: 232-254-5 | CAS number: 7798-23-4
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:
- Testing was conducted between 05 October 2009 and 06 October 2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study was conducted in compliance with agreed protocols with no or minor deviations from standard test guidelines and/or minor methodological deficiencies which do not affect the quality of relevant results.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of GLP Inspection: 19 August 2008 Date of Signature on Certificate: 4 March 2009
- Type of method:
- other: differential scanning calorimetry
- Melting / freezing pt.:
- > 723 K
- Conclusions:
- The test material was determined to have a melting temperature of greater than 723 K. The test material was identified as undergoing dehydration at approximately 461 K and 530 K. These thermal events were not associated with a phase transition (i.e. melting) of the test material.
- Executive summary:
The test material was determined to have a melting temperature greater than 723 K, by differential scanning calorimetry, using ASTM E537-86, Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008. The test material was identified as undergoing dehydration from approximately 461 and 530 K. These thermal events were not associated with a phase transition (i.e. melting) of the test material.
Reference
See attached documents for thermograms.
Thermographic data for Determinations 1 and 2 are shown in the following tables.
Table 4.2 Thermographic Data - Determination 1
Thermal Event |
Interpretation |
Temperature |
|
°C |
K |
||
Onset of endotherm |
Loss of volatiles |
188.09 |
461 |
Onset of endotherm |
Loss of volatiles |
256.78 |
530 |
Table 4.3 Thermographic Data - Determination 2
Thermal Event |
Interpretation |
Temperature |
|
°C |
K |
||
Onset of endotherm |
Loss of volatiles |
188.60 |
462 |
Onset of endotherm |
Loss of volatiles |
257.72 |
531 |
Description of key information
Melting point: > 450°C (EU Method A.1)
Key value for chemical safety assessment
Additional information
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