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

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
GLP compliance:
yes (incl. QA statement)
Remarks:
Hessisches Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid
EC Number:
700-093-4
Cas Number:
176969-34-9
Molecular formula:
C6H6F2N2O2
IUPAC Name:
3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid

Results and discussion

Particle sizeopen allclose all
Percentile:
D10
Mean:
10.7 µm
Remarks on result:
other: St. dev. not reported
Percentile:
D50
Mean:
35.6 µm
Remarks on result:
other: St. dev. not reported
Percentile:
D90
Mean:
78.5 µm
Remarks on result:
other: St. dev. not reported

Any other information on results incl. tables

The median particle size L50 (D (v, 0.5): 50 % of particle volume with lower particle diameter) deduced from these distributions were:

1st test series: L50 = 35.1 µm

2nd test series: L50 = 36.0 µm

The average of the median particle size L50 was:

L50 35.6 µm

The particle size L10 (D (v, O. 1): 10 % of particle volume with lower particle diameter) deduced from these distributions were:

1st test series: L10 = 10.5 µm

2nd test series: L10 = 10.8 µm

The average of the particle size L10 was:

L10 = 10.7 µm

The particle size L90 (D (v, 0.9): 90 % of particle volume with lower particle diameter) deduced from these distributions were:

1st test series: L90 = 77.6 µm

2nd test series: L90 = 79.5 µm

The average of the particle size L90 was:

L90 = 78.5 µm

Two maxima were observed at approximately 1-2 µm and approximately 40 µm.

Applicant's summary and conclusion