Registration Dossier
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EC number: 234-809-7 | CAS number: 12034-59-2
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:
- 2016-06-29
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- 122.04 µm
- Key result
- Percentile:
- D10
- Mean:
- 12.79 µm
- St. dev.:
- 0.6
- Remarks on result:
- other:
- Remarks:
- "According to ISO 13320 the relative standard deviation for d50 is smaller than 3 %, for d10 and d90 smaller than 5 %. For powders below 10 µm these maximum values should be doubled."
- Key result
- Percentile:
- D50
- Mean:
- 122.04 µm
- St. dev.:
- 3.6
- Remarks on result:
- other:
- Remarks:
- "According to ISO 13320 the relative standard deviation for d50 is smaller than 3 %, for d10 and d90 smaller than 5 %. For powders below 10 µm these maximum values should be doubled."
- Key result
- Percentile:
- D90
- Mean:
- 256.67 µm
- St. dev.:
- 12.8
- Remarks on result:
- other:
- Remarks:
- "According to ISO 13320 the relative standard deviation for d50 is smaller than 3 %, for d10 and d90 smaller than 5 %. For powders below 10 µm these maximum values should be doubled."
- Conclusions:
- The median value of particle size of niobium dioxide is 122.04 µm.
- Executive summary:
The granulometric properties of niobium dioxide were analysed by laser diffraction method according to ISO 13320-2009. Therefore, a sample of the test substance niobium dioxide was dispersed in water and Fraunhofer approximation was used for calculation of particle size distribution (PSD). The results of the PSD for niobium dioxide was as follows:
D (v, 0.1) = 12.79 μm
D (v, 0.5) = 122.04 μm
D (v, 0.9) = 256.67 μm
Reference
Description of key information
The median value of particle size of niobium dioxide was determined to be 122.04 µm.
Additional information
The granulometric properties of niobium dioxide were analysed by laser diffraction method according to ISO 13320-2009. Therefore, a sample of the test substance niobium dioxide was dispersed in water and Fraunhofer approximation was used for calculation of particle size distribution (PSD). The results of the PSD for niobium dioxide was as follows:
D (v, 0.1) = 12.79 μm
D (v, 0.5) = 122.04 μm
D (v, 0.9) = 256.67 μm
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