Registration Dossier
Registration Dossier
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EC number: 234-857-9 | CAS number: 12037-29-5
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:
- weight of evidence
- Study period:
- not reported
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted on read-across material
- Remarks:
- Valid with restrictions. This is peer reviewed data where the test methodology and identity of the substance have been evaluated, and a reliable and representative value for the endpoint has been selected. No information on GLP status or test guideline followed is available. The data quoted is for the read across substance praseodymium (III) oxide.
- Justification for type of information:
- Read-across from a supporting substance.
- Reason / purpose for cross-reference:
- other: Read-across target
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- Handbook data does not specify the method. Data from peer reviewed source.
- GLP compliance:
- not specified
- Melting / freezing pt.:
- 2 183 °C
- Conclusions:
- The melting point of the test material is 2183 °C.
- Executive summary:
The melting point of the test material is 2183 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- not reported
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: The data was available as a short abstract as part of a MSDS; it was not possible to assess the accuracy of the data from the information presented. No information on GLP status or test guideline followed is available.
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- No information on the method employed was reported. The information is presented as a short abstract only.
- GLP compliance:
- not specified
- Melting / freezing pt.:
- 2 500 °C
- Conclusions:
- The melting point of the test material is 2500 °C.
- Executive summary:
In a Materials Safety Data Sheet (MSDS), the melting point of the test material is reported as being 2500 °C.
Referenceopen allclose all
Description of key information
Based on the data available, the melting point of the registered substance is estimated to be greater than 2000 °C.
Key value for chemical safety assessment
Additional information
Two sources of information are available for this endpoint:
One from a peer-reviewed handbook on the read-across substance praseodymium (III) oxide (awarded a reliability score of 2 in accordance with the criteria set forth by Klimisch (1997)) and one from a Material Safety Data Sheet (the data was provided as a short abstract with no information on methodology or GLP conditions and was therefore awarded a reliability score of 4 in accordance with the criteria set forth by Klimisch (1997)).
The peer reviewed handbook data gave a result as follows:
Lide, D.R., et al. (2009): 2183 °C.
The Material Safety Data Sheet gave a result as follows:
Anon (2012): 2500 °C.
As such, it is estimated that the melting point for praseodymium (III,IV) oxide is greater than 2000 °C.
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.
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