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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
Study period:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 187 (Particle Size Analysis by Laser Diffraction, Handbook K, 2007)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Dry powder, white to slightly yellow
Specific details on test material used for the study:
Appearance: white to slightly yellow powder
Batch number: Q0926501
Purity/composition: 99.3%
Test item storage: at room temperature protected from light
Stable under storage conditions until: 30 November 2019 (expiry date)
Relative density: 1.59

Results and discussion

Mass median aerodynamic diameter:
ca. 372 µm
Geometric standard deviation:
ca. 1.629
Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
ca. 129 µm
St. dev.:
1.02
Key result
Percentile:
D50
Mean:
ca. 295 µm
St. dev.:
1.44
Key result
Percentile:
D90
Mean:
ca. 525 µm
St. dev.:
5.05

Any other information on results incl. tables

The coefficient of variation for d50 is less than 3%; d10 and d90 are less than 5%. Thus repeatability of the characteristic particles in the size distribution is within the acceptable limits as per the ISO 13320-1 test standard.

Applicant's summary and conclusion