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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:
other company data
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
The particle size distribution is analysed by laser scattering analysis. Laser light interacts with the particles causing diffraction, refraction and absorption, thus producing a characteristic pattern of scattered light. If the particle size is significantly higher than the wavelength of the laser light predominantly diffraction patterns are produced. The principles of measurement are based on the Mie scattering theory and Fourier transformation of light.
GLP compliance:
no
Type of distribution:
other: laser diffraction

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:
D50
Mean:
>= 1.56 - <= 1.69 µm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Percentile:
D10
Mean:
0.81 - 0.85 µm
Percentile:
D50
Mean:
1.56 - 1.69 µm
Percentile:
D90
Mean:
4.76 - 5.63 µm

Any other information on results incl. tables

Surface-to-volume ratio (S/V): 38409.82 - 41227.75 cm2/cm3

Average diameter: 2.24 -2.63 µm

Applicant's summary and conclusion

Conclusions:
D10 = 0.81-0.85 μm
D50 = 1.56-1.69 μm= mass median diameter (MMD)
D90 = 4.76-5.63 μm