Registration Dossier
Registration Dossier
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EC number: 944-732-7 | CAS number: -
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:
- 11 December 2017 - 30 May 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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:
- yes
- Type of method:
- capillary method
- Remarks:
- Metal block method; confirmation with Differential Scanning Calorimetry (DSC)
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- 325 °C
- Conclusions:
- The melting point of the test item could not be determined, as the test item decomposed before melting. The decomposition temperature was determined to be 325 °C.
- Executive summary:
The melting point of the test item was determined in a study following OECD 102 and EC Method A.1 guidelines, using the capillary, metal block method and, for confirmation, differential scanning calorimetry. The melting point of the test item could not be determined, as the test item decomposed before melting; the decomposition temperature was determined to be 325 °C.
The study is a GLP compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.
Reference
During the preliminary melting block method observations, the test item was initially a white powder and then started to turn yellow in colour at 325°C. The test item then was observed to be brown in colour by 360°C. By the end of the test (400°C), the test item was observed to be brown in colour and partially melted. The test item was not a liquid and was considered to have decomposed before the melting point.
In order to confirm the preliminary observations, DSC was performed on a sample of the test item. The sample shows fluctuation of the baseline up to 210°C, indicative of loss of volatile components, and then a sharp peak starting at approximately 320°C, which indicates decomposition.
Description of key information
The melting point of the test item could not be determined, as the test item decomposed before melting.
Key value for chemical safety assessment
Additional information
The melting point of the test item was determined in a study following OECD 102 and EC Method A.1 guidelines, using the capillary, metal block method and, for confirmation, differential scanning calorimetry (Dunning 2018). The melting point of the test item could not be determined, as the test item decomposed before melting; the decomposition temperature was determined to be 325 °C.
The study is a GLP compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.
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