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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
not specified
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Specific details on test material used for the study:
Zinc diacrylate (SR111); CAS No. 14643-87-9; Lot No. 705 SC1703131C, SC1703AC; Purity 100%
Mass median aerodynamic diameter:
> 11 - < 14 µm
Key result
Percentile:
D10
Mean:
> 6 - < 7 µm
St. dev.:
0.57
Key result
Percentile:
D90
Mean:
> 28 - < 57 µm
St. dev.:
11.89
Size:
< 58 µm
Distribution:
< 99 %
Remarks on result:
other: mass median diameter ranged between 11 and 14 microns

Lot Number Mean (microns) Mode (microns) D10 (microns) Median (microns) D90 (microns)
           
705 SC1703131C 1 25 12 7 14 45
705 SC1703131C 2 27 12 7 14 57
705 SC170103AC 1 18 11 6 11 28
705 SC170103AC 2 24 11 6 12 43
Conclusions:
Under the study conditions, the test substance passed approximately 100% through an 80 MESH (177 micron) sieve and approximately 99% through a 250 MESH (58 micron) sieve. The Horiba Particle Size Analyzer was consistent in showing the maximum particle size to be less than 177 microns and that 99% of the particle size distribution was less than 58 microns. In 2 different lots, each measured twice, the mass median diameter ranged between 11 and 14 microns.
Executive summary:

A study was conducted to determine the granulometry of the test substance according to ISO 13320. Two types of measurements were conducted to determine the particle size distribution of test substance: 1. The HK-8 Ultrasonic Vibratory Laboratory Sieve analysis to evaluate particle size by running the test substance through an 80 MESH and a 250 MESH screen. 1. Laser Scattering Analyzer Method using Horiba Particle Size Analyzer. Under the study conditions, the test substance passed approximately 100% through an 80 MESH (177 micron) sieve and approximately 99% through a 250 MESH (58 micron) sieve. The Horiba Particle Size Analyzer was consistent in showing the maximum particle size to be less than 177 microns and that 99% of the particle size distribution was less than 58 microns. In 2 different lots, each measured twice, the mass median diameter ranged between 11 and 14 microns (Wylin, 2017).

Description of key information

Determination of the granulometry according to ISO 13320 (Wylin, 2017).

Additional information

D10: 6 - 7 µm