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EC number: 249-033-4 | CAS number: 28462-17-1
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:
- June 27th 2019
- 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
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
- Version / remarks:
- 1996
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Percentile:
- D10
- Mean:
- 2.13 µm
- Remarks on result:
- other: 10 % vol. of particles have a smaller diameter
- Percentile:
- D50
- Mean:
- 14.73 µm
- Remarks on result:
- other: 50 % vol. of particles have a smaller diameter
- Percentile:
- D90
- Mean:
- 286.35 µm
- Remarks on result:
- other: 90 % vol. of particles have a smaller diameter
- Conclusions:
- The test item has a median particle size D50 = 15 µm.
- Executive summary:
The powder is brought via a powder dispersing cell Scirocco into the laser light beam and the diffraction pattern is determined. From the diffraction pattern the particle size distribution is calculated (small particles have a wide diffraction radius, big particles have a small one). One test series of 3 measurements was performed with the test item.
The test item has a median particle size D50 = 15 µm, which was determined by laser diffraction measurement according to ISO 13320 (2009) and OECD 110 (1981).
Reference
Description of key information
The test item has a median particle size D50 = 15 µm.
Additional information
Laser diffraction measurement according to ISO 13320 (2009) and OECD 110 (1981).
The powder is brought via a powder dispersing cell Scirocco into the laser light beam and the diffraction pattern is determined. From the diffraction pattern the particle size distribution is calculated (small particles have a wide diffraction radius, big particles have a small one). One test series of 3 measurements was performed with the test item.
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