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Particle size distribution (Granulometry)

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Reference
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
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
Principles of method if other than guideline:
In consideration of the relevance of granulometry study on toxicological assessment, only the size distributions of the sieved fraction < 100 μm were studied in detail.
GLP compliance:
yes (incl. QA statement)
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
counted distribution
Mass median aerodynamic diameter:
>= 100 µm
Remarks on result:
other: Standard deviation is not reported as 100% of all particles were >100 µm.
Percentile:
other: 100%
Mean:
>= 100 µm
Remarks on result:
other: Standard deviation is not reported as 100% of all particles were >100 µm.

Result: Sieve Fraction:

- weighted sample: 0.7815 g

- weight fraction <100 μm: 0.00 g

- mass fraction <100 μm: 0.00 %

The sample material has no mass fraction <100 μm and agglomerates in a fibrous manner with a diameter of > 100 μm.

Conclusions:
The sample material had no mass fraction <100 μm and agglomerates in a fibrous manner with a diameter of > 100 μm.
Executive summary:

According to the OECD Guidelines for Testing of Chemicals No: 110 method B “Particle Size Distribution/Fibre Length and diameter Distributions” the sample was fractionated by a 100 µm sieve. There were no particles smaller than 100 µm which made further microscopic steps obsolete. The sample material had no mass fraction <100 μm and agglomerates in a fibrous manner with a diameter of > 100 μm.

Description of key information

The sample material of Solvent Red 52 had no mass fraction <100 μm and agglomerates in a fibrous manner with a diameter of > 100 μm.

Additional information

The sample was fractionated by a 100 µm sieve. There were no particles smaller than 100 µm which made further microscopic steps obsolete.