Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 261-999-9 | CAS number: 59963-30-3
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 to 01 June 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.:
- 185 °C
- Conclusions:
- The melting point of the test item could not be determined as the test item decomposed before melting. The decomposition temperature was 185°C.
- Executive summary:
The melting point of the test item was investigated 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 185°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 approximately 200°C. The test item was then observed to have become brown in colour by 275°C. Upon reaching 315°C, the test item was observed to be fully black in colour. The test item was not a liquid and was therefore considered to have decomposed before the melting point.
During the additional preliminary test, the test item was observed to have become brown in colour by 185°C, although there was slight yellowing of the colour at 180°C.
In order to confirm the preliminary observations, DSC was performed on a sample of the test item. As the DSC was inconclusive, the onset of decomposition was considered to be 185°C.
Description of key information
The melting point of the test item could not be determined as the test item decomposed before melting. The decomposition temperature was 185°C.
Key value for chemical safety assessment
Additional information
The melting point of the test item was investigated 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 185°C.
The study is a GLP-compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
