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EC number: 236-715-1 | CAS number: 13466-20-1
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:
- 30-May-2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- GLP 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
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187 Particle Size Analysis by Laser Diffraction
- 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: non-transparent particles and agglomerates
- Type of distribution:
- volumetric distribution
- Specific details on test material used for the study:
- - Appearance: solid/white
- Analytical purity: 44.8 % BaO and 42.8 % P2O5, 12.7% LOI
- Batch No.: 9000008613
- Expiration date of the lot/batch: April 23, 2017
- Storage conditions: Ambient temperature (10 °C - 30 °C) - Mass median aerodynamic diameter:
- ca. 197 µm
- Percentile:
- D10
- Mean:
- 36 µm
- Remarks on result:
- other: St. dev. is not provided in the study report
- Key result
- Percentile:
- D50
- Mean:
- 114 µm
- Remarks on result:
- other: St. dev. is not provided in the study report
- Percentile:
- D90
- Mean:
- 307 µm
- Remarks on result:
- other: St. dev. is not provided in the study report
Reference
Two test series of three measurements each were performed.
Test series |
D10 (µm) |
D50 (µm) |
D90 (µm) |
1 |
34.0 |
111.8 |
315.6 |
2 |
37.8 |
115.8 |
298.0 |
Mean |
36 |
114 |
307 |
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 [1]
with
D50 = volume median diameter (VMD)
ρ = particle density
K = shape factor (1 for spheric particles)
[1] H. Krarup, Malvern Instruments Inc, Workshop 2005
In case of test substance, it has a relative density of 2.983, the shape factor is 1, therefore the MMAD is calculated to be 197 µm.
Description of key information
D50 = 114 µm (OECD 110, Laser diffraction)
MMAD = 197 µm (calculated)
Additional information
The particle size distribution of test substance was determined by Laser diffraction following OECD Guideline 110. MMAD is calculated based on the experimental result of D50.
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