Registration Dossier
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EC number: 473-810-9 | CAS number: -
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 06 September 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
- Version / remarks:
- 1981
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: NF ISO 2591-1
- Version / remarks:
- 1989
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: NFX11-507
- Version / remarks:
- 1989
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- counted distribution
- Key result
- Percentile:
- D50
- Mean:
- 85.183 µm
- Remarks on result:
- other: Assay No. 1
- Remarks:
- Standard deviation not reported
- Key result
- Percentile:
- D50
- Mean:
- 80.226 µm
- Remarks on result:
- other: Assay No. 2
- Remarks:
- Standard deviation not reported
- Conclusions:
- Under the conditions of this study, in the first assay the median and mean diameters were determined to be 45.380 and 85.183 μm, respectively and in the second assay the median and mean diameters were determined to be 43.118 and 80.226 μm, respectively.
- Executive summary:
The particle size distribution of the test material was investigated in a study which was performed in accordance with the standardised guidelines OECD 110, NF ISO 2591-1 and NFX11-507.
Analysis was carried out through laser diffraction using a particle size analyser. The wet dispersion method was used with lsopar J (paraffinic hydrocarbon) that contained 0.17 % of dispersant (span: sorbitan mono oleate).
A representative aliquot (50 mg approx.) of test material was introduced in the sample dispersion unit containing about 80 mL of lsopar J solution containing 0.17 % of span. Magnetic stirring at 1500 rpm was applied. The sample was then transferred to the measurement system to be analysed by laser diffraction. The particle size distribution given for each assay was a mean distribution obtained from three successive analysis of the sample.
Under the conditions of this study, in the first assay the median and mean diameters were determined to be 45.380 and 85.183 μm, respectively and in the second assay the median and mean diameters were determined to be 43.118 and 80.226 μm, respectively.
Reference
- Assay No. 1
Median diameter: 45.380 µm
Mean diameter: 85.183 µm
- Assay No. 2
Median diameter: 43.118 µm
Mean diameter: 80.226 µm
Description of key information
Under the conditions of this study, in the first assay the median and mean diameters were determined to be 45.380 and 85.183 μm, respectively and in the second assay the median and mean diameters were determined to be 43.118 and 80.226 μm, respectively.
Additional information
The particle size distribution of the test material was investigated in a study which was performed in accordance with the standardised guidelines OECD 110, NF ISO 2591-1 and NFX11-507. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
Analysis was carried out through laser diffraction using a particle size analyser. The wet dispersion method was used with lsopar J (paraffinic hydrocarbon) that contained 0.17 % of dispersant (span: sorbitan mono oleate).
A representative aliquot (50 mg approx.) of test material was introduced in the sample dispersion unit containing about 80 mL of lsopar J solution containing 0.17 % of span. Magnetic stirring at 1500 rpm was applied. The sample was then transferred to the measurement system to be analysed by laser diffraction. The particle size distribution given for each assay was a mean distribution obtained from three successive analysis of the sample.
Under the conditions of this study, in the first assay the median and mean diameters were determined to be 45.380 and 85.183 μm, respectively and in the second assay the median and mean diameters were determined to be 43.118 and 80.226 μm, respectively.
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