Registration Dossier
Registration Dossier
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EC number: 237-044-7 | CAS number: 13597-19-8
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:
- 29 January 2018
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Remarks:
- In-house study
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Differential scanning calorimetry was used. The system has been checked with a certified reference sample, BaCO3, for melting point accuracy and it is within specification.
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 1 500 °C
- Atm. press.:
- 1 013 hPa
- Conclusions:
- The test item did not show any evidence of melting in the tested temperature range. A further experiment with a range up to 1500°C also did not indicate melting. There was evidence of a weak endothermic reaction with an onset of 669.9°C. In addition, there was indication of sintering in the region between 960°C and 980°C.
- Executive summary:
Johnson Matthey (2018) is not GLP-compliant but followed a standard method for determining melting point (differential scanning calorimetry) and is acceptable with restrictions (Klimisch 2).
The test item did not show any evidence of melting in the tested temperature range. A further experiment with a range up to 1500°C also did not indicate melting. There was evidence of a weak endothermic reaction with an onset of 669.9°C. In addition, there was indication of sintering in the region between 960°C and 980°C.
Reference
The test item does not show any evidence of melting in the tested temperature range. A further experiment with a range up to 1500 °C does not indicate melting, either.
There is evidence of a weak endothermic reaction with an onset of 669.9 °C. In addition, there is indication of sintering in the region between 960 °C and 980 °C.
Description of key information
The test item did not show any evidence of melting in the tested temperature range. A further experiment with a range up to 1500°C also did not indicate melting. There was evidence of a weak endothermic reaction with an onset of 669.9°C. In addition, there was indication of sintering in the region between 960°C and 980°C.
Key value for chemical safety assessment
Additional information
Johnson Matthey (2018) is not GLP-compliant but followed a standard method for determining melting point (differential scanning calorimetry) and is acceptable with restrictions (Klimisch 2).
The test item did not show any evidence of melting in the tested temperature range. A further experiment with a range up to 1500°C also did not indicate melting. There was evidence of a weak endothermic reaction with an onset of 669.9°C. In addition, there was indication of sintering in the region between 960°C and 980°C.
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