Registration Dossier
Registration Dossier
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EC number: 231-667-8 | CAS number: 7681-49-4
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: 2.e: based on generally well accepted scientific principles, well documented
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: NF 13320
- Deviations:
- not specified
- GLP compliance:
- not specified
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- Sodium fluoride
- EC Number:
- 231-667-8
- EC Name:
- Sodium fluoride
- Cas Number:
- 7681-49-4
- Molecular formula:
- FNa
- IUPAC Name:
- sodium fluoride
- Details on test material:
- - Name of test material (as cited in study report): NaF, 3_NAF
- Substance type: cristal
- Physical state: solid
- Lot/batch No.: silo 7 limsnr 130883
No further information
Constituent 1
Results and discussion
Particle sizeopen allclose all
- Percentile:
- D50
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 32.43 µm
- Percentile:
- D50
- Mean:
- 97.7 µm
- Percentile:
- D90
- Mean:
- 167.6 µm
- Percentile:
- D99
- Mean:
- 231.56 µm
Any other information on results incl. tables
Specific surface area= 0.2474 m² / cc
Mean diameter= 99.47 µm
Applicant's summary and conclusion
- Conclusions:
- In the test conditions, the authors of this in-house investigation found that sodium fluoride has a mean diameter of 99.47 µm and a D50 of 97.7 µm when the granulometry is analyzed by laser diffraction.
- Executive summary:
In this in-house investigation, the authors tested the granulometry of sodium fluoride (CAS n° 7681 -49 -4) with a laser diffraction method. They controlled the volume distribution of sodium fluoride recently manufactured with a principle based on a methodology similar to the french standard NF ISO 13320. Deviations to this standard are unknown.
Hence, the investigators estimated that sodium fluoride has a mean diameter of 99.47 µm and a D50 of 97.7 µm. Furthermore, they established the specific surface area of the test substance at 0.2474 m² / cc.
The analysis of granulometry with a laser diffraction is based on generally accepted scientific principles. Furthermore, the present in-house report is sufficiently documented. Hence this study should be considered as reliable with restrictions, a Klimisch 2.e study.
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