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EC number: 215-164-0 | CAS number: 1308-87-8
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 28 January 2016
- 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:
- other company data
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Within this study, Microtrac equipment was used to perform full channel analysis of particle size distribution.
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- Didysprosium trioxide
- EC Number:
- 215-164-0
- EC Name:
- Didysprosium trioxide
- Cas Number:
- 1308-87-8
- Molecular formula:
- Dy2O3
- IUPAC Name:
- dysprosium(3+); oxygen(2-)
- Test material form:
- solid: particulate/powder
- Details on test material:
- Name of the test material (as cited in the report): didysprosium trioxide
Physical state: solid
Appearance: (pale) yellow powder
Further information on test item confidential.
Constituent 1
Results and discussion
Particle sizeopen allclose all
- Key result
- Percentile:
- D10
- Mean:
- 0.516 µm
- Remarks on result:
- other: Average of 3 runs
- Key result
- Percentile:
- D50
- Mean:
- 4.06 µm
- Remarks on result:
- other: Average of 3 runs
- Key result
- Percentile:
- D90
- Mean:
- 9.32 µm
- Remarks on result:
- other: Average of 3 runs
Any other information on results incl. tables
Summary of results are as follows:
| Data | Value |
| MV (µm) | 4.70 |
| MN (µm) | 0.234 |
| MA (µm) | 1.421 |
| CS | 4.22 |
| SD | 3.49 |
| Mz | 4.24 |
| si | 3.49 |
| Ski | 0.2131 |
| Kg | 1.015 |
Percentiles:
| d(i) | d(µm) |
| 10 | 0.516 |
| 20 | 1.239 |
| 30 | 2.314 |
| 40 | 3.22 |
| 50 | 4.06 |
| 60 | 4.92 |
| 70 | 5.89 |
| 80 | 7.14 |
| 90 | 9.32 |
| 95 | 11.83 |
Summary of peak:
| d(µm) | Volume in % | Width |
| 4.64 | 86.4 | 6.22 |
| 0.468 | 9.7 | 0.291 |
| 0.192 | 3.9 | 0.061 |
Applicant's summary and conclusion
- Conclusions:
- Based on the full channel analysis of particle size distribution performed for a representative sample of didysprosium trioxide, the D10, D50 and D90 values were 0.516, 4.06 and 9.32, respectively.
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