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Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Test procedure in accordance with generally accepted scientific standards and described in sufficient detail; however, no GLP-study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Principles of Measurement: Based on Mie scattering theory
The apparatus uses laser light with a wavelength of 750 nm to size particles with diameters from 0.04 μm to 2000 μm by light diffraction. The laser's radiation passes through a spatial filter and projection lens to form a beam of light. The beam passes through the sample cell where particles suspended in liquid or air scatter the incident light in characteristic patterns which depend on their sizes. Fourier optics collect the diffracted light and focus it onto three sets of detectors, one for the low-angle scattering, the second for mid-angle scattering, and the third for high angle scattering.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Results and discussion

Particle sizeopen allclose all
Percentile:
D10
Mean:
0.497 µm
Remarks on result:
other: no information available on st. dev.
Percentile:
D50
Mean:
4.614 µm
Remarks on result:
other: no information available on st. dev.
Percentile:
D90
Mean:
24.14 µm
Remarks on result:
other: no information available on st. dev.

Any other information on results incl. tables

Volume: 100 %

Mean: 9.978 µm

Median: 4.614 µm

C.V.: 159 %

Applicant's summary and conclusion

Conclusions:
D10 = 0.497 μm
D50 = 4.614 μm= mass median diameter (MMD)
D90 = 24.14 μm
Average size of particles = 9.978 μm
Executive summary:

The particle size distribution of the test substance has been determined by laser diffraction (non-GLP, 2015) and the following results have been obtained for the sample tested:

 Particle size < 100 µm [%]  ~ 99
 Particle size < 10 µm [%] ~ 77
 Particle size < 4 µm [%] ~ 45
 D10 [µm]  0.497
 D50 [µm]  4.614
 D90 [µm]  24.14