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EC number: 237-000-7 | CAS number: 13573-12-1
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:
- 24 Nov. - 29. Nov. 2016
- 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 B: Fibre Length and Diameter Distributions
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- other: slightly transparent particles of irregular shape
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- ca. 20.3 µm
- Percentile:
- D10
- Mean:
- 1.7 µm
- St. dev.:
- 0
- Key result
- Percentile:
- D50
- Mean:
- 12.1 µm
- St. dev.:
- 0
- Percentile:
- D90
- Mean:
- 163.3 µm
- St. dev.:
- 0
Reference
Two test series of three measurements each were performed.
Test series |
D10(µm) |
D50(µm) |
D90(µm) |
1 |
1.7 |
12.2 |
165.2 |
2 |
1.7 |
11.9 |
161.3 |
Mean |
1.7 |
12.1 |
163.3 |
The mass median aerodynamic diameter was calculated by using the results of the particle size distribution and the determination of the relative density by following equation:
MMAD = D50* (ρ/K)0.5
with
D50 = volume median diameter (VMD)
ρ = particle density
K = shape factor (1 for spheric particles)
Description of key information
L50 = 12.1 µm (OECD 110, GLP)
Additional information
particle size distribution by laser diffraction
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