Registration Dossier
Registration Dossier
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EC number: 271-826-9 | CAS number: 68609-42-7
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- May - October 2017
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- GLP compliance:
- no
- Other quality assurance:
- other: ISO 13320
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- aggregate
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- Gadolinium oxide sulfide (Gd2O2S), praseodymium-doped
- EC Number:
- 271-826-9
- EC Name:
- Gadolinium oxide sulfide (Gd2O2S), praseodymium-doped
- Cas Number:
- 68609-42-7
- Molecular formula:
- Gd2O2S
- IUPAC Name:
- digadolinium dioxid sulfide, praseodymium-doped
- Test material form:
- solid
Constituent 1
Results and discussion
- Mass median aerodynamic diameter:
- ca. 80 µm
Particle sizeopen allclose all
- Percentile:
- D10
- Mean:
- > 38.5 - < 39.7 µm
- St. dev.:
- 0.5
- Key result
- Percentile:
- D50
- Mean:
- > 75.2 - < 75.9 µm
- St. dev.:
- 0.3
- Percentile:
- D90
- Mean:
- > 111.7 - < 114.8 µm
- St. dev.:
- 1.5
- Percentile:
- D99
- Mean:
- > 152 - < 387 µm
- St. dev.:
- 99
Any other information on results incl. tables
In order to allow a better interpretation of the resulting particle size distribution, we have investigated the particle morphology of the powder using scanning electron microscopy (SEM). An overview of the particle morphology is presented in Figures 1a - 1d. The sample shown here originates from a batch of powder, which was processed in the same way as sample 3.1-07-G, but was in contact with ambient air for more than 30 min. Thus, a chemical reaction of the particle surface cannot be excluded, but is unlikely to have any influence on the morphology of the particles.
Applicant's summary and conclusion
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