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Physical & Chemical properties

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:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
other: NF 13320
Deviations:
not specified
GLP compliance:
not specified
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
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

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.