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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:
24 April 2020
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline available
Principles of method if other than guideline:
The analysis was carried out both on a Microtrac S3500 which uses laser diffraction technology, and also with the use of scanning electron microscopy.
GLP compliance:
not specified
Remarks:
not required for physicochemical data
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Remarks on result:
other: MMAD and GSD are not reported
Percentile:
D90
Mean:
52 µm
Remarks on result:
other: st. dev. not reported
Remarks:
Determination by laser diffraction
Percentile:
D50
Mean:
30.8 µm
Remarks on result:
other: st. dev. not reported
Remarks:
Determination by laser diffraction
Percentile:
D10
Mean:
17.7 µm
Remarks on result:
other: st. dev. not reported
Remarks:
Determination by laser diffraction
No.:
#1
Size:
>= 1 - <= 10 µm
Distribution:
9.3 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#2
Size:
>= 11 - <= 20 µm
Distribution:
11.5 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#3
Size:
>= 21 - <= 30 µm
Distribution:
29.6 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#4
Size:
>= 31 - <= 40 µm
Distribution:
24.3 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#5
Size:
>= 41 - <= 50 µm
Distribution:
10.8 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#6
Size:
>= 51 - <= 60 µm
Distribution:
8.5 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#7
Size:
>= 61 - <= 70 µm
Distribution:
4 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#8
Size:
>= 71 - <= 80 µm
Distribution:
1.3 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#9
Size:
>= 81 - <= 90 µm
Distribution:
0.5 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
No.:
#10
Size:
>= 91 - <= 100 µm
Distribution:
0.3 %
Remarks on result:
other: Distribution: relative frequency.
Remarks:
Determination by SEM.
Conclusions:
Under the conditions of this study, the D10 was 17.7 µm, D50 was 30.8 µm and D90 was 52.0 µm.
Executive summary:

The particle size distribution of the test material was investigated using laser diffraction technology, and also with the use of scanning electron microscopy.

Under the conditions of this study, the D10 was 17.7 µm, D50 was 30.8 µm and D90 was 52.0 µm.

Description of key information

The D10 was 17.7 µm, D50 was 30.8 µm and D90 was 52.0 µm.

Additional information

The particle size distribution of the test material was investigated using laser diffraction technology, and also with the use of scanning electron microscopy.

The study was awarded a reliability score of 2 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of this study, the D10 was 17.7 µm, D50 was 30.8 µm and D90 was 52.0 µm.