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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:
6 November 2015
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
laser diffraction analysis
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
other: suspension in aqueous solution
Type of distribution:
volumetric distribution
Remarks on result:
not determinable
Remarks:
no density data available for the batch tested
Key result
Percentile:
D50
Mean:
1.61 µm
Remarks on result:
other: corrected D50
Percentile:
D90
Mean:
3.49 µm
Remarks on result:
other: corrected D90
No.:
#1
Size:
<= 0.601 µm
Distribution:
10 %
No.:
#2
Size:
<= 0.924 µm
Distribution:
20 %
No.:
#3
Size:
<= 1.134 µm
Distribution:
30 %
No.:
#4
Size:
<= 1.337 µm
Distribution:
40 %
No.:
#5
Size:
<= 1.57 µm
Distribution:
50 %
No.:
#6
Size:
<= 1.859 µm
Distribution:
60 %
No.:
#7
Size:
<= 2.229 µm
Distribution:
70 %
No.:
#8
Size:
<= 2.724 µm
Distribution:
80 %
No.:
#9
Size:
<= 3.54 µm
Distribution:
90 %

26% of the particles are <1 µm in size

3% of the particles are >5 µm in size

Conclusions:
The D50 of the substance was determined with laser diffraction analysis to be 1.61 µm.
3% of the substance has a particle size of >5 µm, and 26% has a particles size <1 µm.

Description of key information

The particle size distribution of a sample of the substance was determined using laser diffraction analysis (volumetric distribution): 10% < 0.601 µm; 50% < 1.57 µm; 90% < 3.54 µm; 26% < 1 µm. 3% > 5 µm.

D50corr = 1.61 µm.

The MMAD could not be calculated.

Additional information

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