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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:
2013-07-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187 - Particle Size Analysis by Laser Diffraction
Deviations:
no
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
(5Z)-5-(phenylmethylidene)imidazolidine-2,4-dione
EC Number:
700-728-5
Cas Number:
74805-60-0
Molecular formula:
C10H8N2O2
IUPAC Name:
(5Z)-5-(phenylmethylidene)imidazolidine-2,4-dione
Test material form:
solid: particulate/powder

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
6 µm
Remarks on result:
other: Standard deviation not reported
Key result
Percentile:
D50
Mean:
28.7 µm
Remarks on result:
other: Standard deviation not reported
Key result
Percentile:
D90
Mean:
78.9 µm
Remarks on result:
other: Standard deviation not reported

Any other information on results incl. tables

The test item consists of rod like particles (partly agglomerated, partly broken). 


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


1st test series: L50 = 28.71 μm


2nd test series: L50 = 28.76 μm


The average of the median particle size L50 is


 L50 = 28.7 μm


 


The particle size L10 (D (v, 0.1): 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:


1st test series: L10 = 5.98 μm


2nd test series: L10 = 6.00 μm


The average of the median particle size L10 is


 L10 = 6.0 μm


 


The particle size L90 (D (v, 0.1): 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:


1st test series: L90 = 79.01 μm


2nd test series: L90 = 78.87 μm


The average of the median particle size L10 is


 L90 = 78.9 μm


 


The precentage of particles with a particle size < 2 μm is approx. 3 % by mass of the total test item and the precentage of paticles with a particle size > 200 μm is approx. 1 % by mass of the total test item. 

Applicant's summary and conclusion

Conclusions:
The test item has a median particle size D50 = 28.7 µm, which was determined by laser diffraction measurement. D10 and D90 are 6.0 and 78.9 µm, respectively.