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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
8 Nov 2017
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)
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)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Specific details on test material used for the study:
- Name of test material (as cited in study report): Perkacit TBzTD-pdr (Tetrabenzylthiuram disulfide)
- Batch No.: 70800108
- Purity: 98.7%
- Appearance: Light beige solid
- Storage conditions: Ambient temperature (10 - 30 °C)
- Date of analysis: August 22, 2017
- Expiration date: August 23, 2019
Key result
Percentile:
D50
Mean:
4.3 µm
Remarks on result:
other: average of two measurements
Percentile:
D10
Mean:
1 µm
Remarks on result:
other: average of two measurements
Percentile:
D90
Mean:
14.1 µm
Remarks on result:
other: average of two measurements

The particle size distribution showed a bimodal distribution with one large peak and one small peak. The maximum of thee large fraction was observed at approximately 5 µm and the maximum of the small fraction at approximately 200 µm.

Conclusions:
The median particle size of the test item is 4.3 µm.
Executive summary:

The particle size of the test item was determined following guidelines OECD 110, ISO 13320 (2009) and CIPAC MT 187 under GLP by the laser difraction method. The particle size distribution showed a bimodal distribution with one large peak (~5 µm) and one small peak (~20 µm) . The median particle size (D50) of the test item was found to be 4.3 µm; the D10 was found to be 1.0 µm and the D90 was found to be 14.1 µm.

Description of key information

The median particle size (D50) of the test substance was determined to be 4.3 µm by laser diffraction.

Additional information