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Diss Factsheets

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:
08 Dec 2020 to 08 Dec 2020
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2021
Report date:
2021

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187
Version / remarks:
2007
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
other: Medium Volume Distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
3-phenyl-1H-pyrazole-4-carbaldehyde
EC Number:
632-673-7
Cas Number:
26033-20-5
Molecular formula:
C10H8N2O
IUPAC Name:
3-phenyl-1H-pyrazole-4-carbaldehyde
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Batch (Lot) Number: M19LD3723
- Purity/Composition: 103.6%
- Purity/Composition correction factor: 1.0
- Purity test date : 2020-05-04
- Expiry date: 11 November 2021 (retest date)
- Physical Description: Light yellow powder

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature

Results and discussion

Mass median aerodynamic diameter:
2.5 µm
Geometric standard deviation:
2.904
Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
0.506 µm
St. dev.:
0.001
Remarks on result:
other: standard deviation of the population
Key result
Percentile:
D50
Mean:
2.15 µm
St. dev.:
0.017
Remarks on result:
other: standard deviation of the population
Key result
Percentile:
D90
Mean:
8.34 µm
St. dev.:
0.038
Remarks on result:
other: standard deviation of the population

Any other information on results incl. tables

The test item proved to be homogeneously and well dispersed in Isoparaffin G and therefore this solvent was used as the dispersant in the Laser Diffraction Analysis.


The particle size distribution of the test item was analysed over the range 0.01 μm to 1400 μm.


The coefficient of variation for d50 is less than 3%, and for d10 and d90 is less than 5%. It can be concluded that the repeatability of the measured particle size distributions is within the acceptable limits.

Applicant's summary and conclusion

Conclusions:
The D50 of the test item was determined to be 2.15 μm, the D10 was 0.506 μm and the D90 was 8.34 μm. The MMAD of the test item, for the relative density and the mean d50, was calculated to be 2.50 μm.