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Physical & Chemical properties

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:
01.04.2014
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
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
10.6 µm
Remarks on result:
other: SD not indicated
Key result
Percentile:
D50
Mean:
49.7 µm
Remarks on result:
other: SD not indicated
Percentile:
D90
Mean:
173 µm
Remarks on result:
other: SD not indicated

The test item consisted of irregular shaped crystals. Thus, prior to the measurements 100 % of the test item were passed through a 1000 µm mesh sieve.


The median particle size L50 (D (v, 0.5): 50 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were: 


1st test series: L50 = 51.2 µm


2nd test series: L50 = 48.2 μm 


The average of the median particle size L50 was: L50 = 49.7 μm


 


The particle size L10 (D (v, 0.1): 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were: 


1st test series: L10 = 10.9 μm 


2nd test series: L10 = 10.2 μm 


The average of the particle size L10 was: L10 = 10.6 μm 


 


The particle size L90 (D (v, 0.9): 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were: 


1st test series: L90 = 176.1 μm


2nd test series: L90 = 169.9 μm


The average of the particle size L90 was: L90 = 173.0 μm 


 


Each measurement showed a maximum at approx. 60 µm and a shoulder at approx. 2 µm.

Conclusions:
The median particle size L50 of the test item deduced from the particle size distributions was 49.7 μm.
Executive summary:

The determination of the particle size distribution by laser diffraction of the test item was performed according to the OECD Guideline 110 by laser diffraction. The median particle size L50 of the test item deduced from the particle size distributions was 49.7 μm.

Description of key information

The median particle size L50 of the test item deduced from the particle size distributions was 49.7 μm.

Additional information

The determination of the particle size distribution by laser diffraction of the test item was performed according to the OECD Guideline 110 by laser diffraction. The median particle size L50 of the test item deduced from the particle size distributions was 49.7 μm.