Registration Dossier
Registration Dossier
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EC number: 234-764-3 | CAS number: 12032-20-1
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:
- 13 September 2016 - 30 May 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same 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 (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 600 °C
- Atm. press.:
- 101.325 kPa
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: No melting point was recorded up to 600°C.
- Conclusions:
- The melting behaviour of dilutetium trioxide was assessed according to the EU A.1 method and OECD test guideline 102 in compliance with GLP using Differential Scanning Calorimetry (DSC). No melting point of the test item was recorded up to 600°C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- Data were obtained from the peer reviewed CRC handbook. No information on methodology given.
- GLP compliance:
- no
- Type of method:
- other: no data
- Melting / freezing pt.:
- 2 427 °C
- Atm. press.:
- 101.325 kPa
- Conclusions:
- According to the peer reviewed CRC handbook, lutetium oxide has a melting point of 2427°C.
Referenceopen allclose all
Assay No. 1 (isotherm at 25°C for 5 min, heating ramp: 25°C to 600°C at 10°C/min):
No melting point of the test item was recorded up to 600°C.
Assay No. 2 (isotherm at 25°C for 5 min, heating ramp: 25°C to 600°C at 10°C/min):
The second assay was similar to the first one.
No melting point of the test item was recorded up to 600°C.
Description of key information
From a GLP study (K1, Demangel, 2017) based on the OECD 102 guideline and the EC A.1 method, the test item does not have a melting point since no melting of the test item was recorded up to 600 °C. Additionally, based on experimental data mentioned in the literature (CRC Handbook of Chemistry and Physics, 2016), lutetium oxide has a melting point of 2427°C at ambient pressure, which supports the result of the key study.
Key value for chemical safety assessment
Additional information
The test item does not have a melting point up to 600°C.
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