Registration Dossier
Registration Dossier
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EC number: 832-253-5 | CAS number: 12165-18-3
Density
Administrative data
- Endpoint:
- density, other
- Remarks:
- density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 30 November 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The analysis to estimate the intrinsic density of a representative sample of the reaction mass of praseodymium(III,IV) oxide and zirconium dioxide was carried out using helium pycnometry.
- GLP compliance:
- not specified
- Type of method:
- pycnometer method
Test material
- Reference substance name:
- bis(λ⁴-praseodymium(4+)) bis(λ³-zirconium(3+)) heptaoxidandiide
- Cas Number:
- 12165-18-3
- Molecular formula:
- Pr2Zr2O7
- IUPAC Name:
- bis(λ⁴-praseodymium(4+)) bis(λ³-zirconium(3+)) heptaoxidandiide
- Test material form:
- solid: particulate/powder
- Details on test material:
- No further details on test material available.
Constituent 1
- Specific details on test material used for the study:
- Initially, this substance was considered as a reaction mass and named "reaction mass of praseodymium(III,IV) oxide and zirconium dioxide".
But after discussion with ECHA, it was stipulated that it is a substance and we had to change the name to "Dipraseodymium dizirconium heptaoxide".
So, in the different endpoints with studies, the sustance named "reaction mass of praseodymium(III,IV) oxide and zirconium dioxide" corresponds to the substance Dipraseodymium dizirconium heptaoxide. They are the same, the analytical dossier did not changed.
Results and discussion
Density
- Key result
- Type:
- density
- Density:
- 5.865 g/cm³
- Remarks on result:
- other: The density of the sample was determined to be 5.8647 ± 0.008 g/cm3.
Applicant's summary and conclusion
- Conclusions:
- Based on the in-house study of Solvay (using helium pycnometry), the density of a representative sample of the substance was determined to be 5.8647 ± 0.008 g/cm3.
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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