Registration Dossier
Registration Dossier
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EC number: 832-253-5 | CAS number: 12165-18-3
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 25 January 2018
- 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:
- 2 018
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Determination of particle size distribution by laser diffraction.
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- reaction mass of praseodymium(III,IV) oxide and dioxozirconium
- EC Number:
- 910-538-6
- Molecular formula:
- (Pr6O11)x (ZrO2)y, with 10 >= x <= 40 and 60 >= y <= 90 (when expressed in % w/w)
- IUPAC Name:
- reaction mass of praseodymium(III,IV) oxide and dioxozirconium
- Test material form:
- solid: particulate/powder
- Details on test material:
- Details confidential.
Constituent 1
Results and discussion
Particle sizeopen allclose all
- Key result
- Percentile:
- D10
- Mean:
- 1.5 µm
- Remarks on result:
- other: SD not reported
- Key result
- Percentile:
- D10
- Mean:
- 1.1 µm
- Remarks on result:
- other: measurement after 2-min ultrasonic treatment / SD not reported
- Key result
- Percentile:
- D50
- Mean:
- 7.2 µm
- Remarks on result:
- other: SD not reported
- Key result
- Percentile:
- D50
- Mean:
- 8.7 µm
- Remarks on result:
- other: measurement after 2-min ultrasonic treatment / SD not reported
- Key result
- Percentile:
- D90
- Mean:
- 26.2 µm
- Remarks on result:
- other: SD not reported
- Key result
- Percentile:
- D90
- Mean:
- 30 µm
- Remarks on result:
- other: measurement after 2-min ultrasonic treatment / SD not reported
Any other information on results incl. tables
After 2-min ultrasonic treatment, two populations were obtained, the main population around 10 µm and a smaller one around 800 nm. The sample that was not treated ultrasonically before measurement only showed one population around 10 µm.
Applicant's summary and conclusion
- Conclusions:
- Based on the results of the laser diffraction measurements, it can be concluded that the d10, d50 and d90 values of the untreated test item were 1.5, 7.2 and 26.2 µm, respectively.
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