Registration Dossier
Registration Dossier
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EC number: 235-060-9 | CAS number: 12064-62-9
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:
- 10 June 2016 - 30 August 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- 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 digadolinium 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
- Key result
- Melting / freezing pt.:
- 2 425 °C
- Atm. press.:
- 101.325 kPa
- Conclusions:
- According to the peer reviewed CRC handbook, gadolinium oxide has a melting point of 2425°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
In a GLP experiment assigned as key study (Klimisch 1, Demangel, 2016) and performed according to the EU A.1 method and OECD test guideline 102 no melting point of the test item was recorded up to 600°C. Handbook data from the CRC Handbook of Chemistry and Physics (97th edition, 2016-2017) reported a melting point of 2425°C for gadolinium oxide. This result was used as supporting study (Klimisch 2).
Key value for chemical safety assessment
Additional information
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.
