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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:
04_2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
GLP compliance:
no
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:
2,2,6,6-tetramethylpiperidinooxy
EC Number:
219-888-8
EC Name:
2,2,6,6-tetramethylpiperidinooxy
Cas Number:
2564-83-2
Molecular formula:
C9H18NO
IUPAC Name:
2,2,6,6-tetramethylpiperidinooxy
Test material form:
solid

Results and discussion

Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
< 1 600 µm
Distribution:
0.567 other: mm
No.:
#2
Size:
> 1 600 µm
Distribution:
0.745 other: mm

Applicant's summary and conclusion

Conclusions:
With this method, particles with diameters from 50 μm up to 18 mm (shadow projection) could be detected.
In addition to the evaluation of the two sieve fractions (<1600 μm and >1600 μm), the sum is also available in
the diagrams (size distribution and sum curve) on the following pages. The corresponding pictures are also
available.
The arithmetic mean of the Feret diameter of the fraction <1600 μm is 0.567mm. The mean value for the sample
>1600 μm is 0.745 mm. For the sum of both samples, the mean diameter is 0.632 mm.
In relation to the Feret diameter, the total proportion of particles (sum of both samples) smaller than 100 μm is 3.4 %.