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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:
14 December 2017 to 31 January 2018
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Deviations:
yes
Remarks:
the temperature and the relative humidity were not recorded during the test due to a recorder dysfunction (this deviation was not considered to have affected the quality or the interpretation of the results obtained)
Qualifier:
according to
Guideline:
other: CIPAC Hanbook K - MT 187 method (2003)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
The OECD 110 test was conducted in compliance with GLP. The laser diffraction method was not conducted in compliance with GLP.
Type of method:
other: sieving and laser diffraction
Type of particle tested:
primary particle
Type of distribution:
other: mass based distribution and volumetric distribution
Test material information:
Composition 1
Mass median aerodynamic diameter:
213 µm
Key result
Percentile:
D10
Mean:
15 µm
Remarks on result:
other: SD not provided
Key result
Percentile:
D50
Mean:
163 µm
Remarks on result:
other: SD not provided
Key result
Percentile:
D90
Mean:
484 µm
Remarks on result:
other: SD not provided

OECD 110 - Sieving

After the preliminary test, it was shown that the majority of the particles (99.8 %) was between the receiver pan and 1 mm. Thus, the principal sieving was made lower than 1 mm.

After the main test, it was shown that the majority of the particles (85.5 %) was between 25 and 500 µm and 9.8 % lower than 25 µm.

CIPAC MT 187 - Laser diffraction

The particle size distribution of the test material was found to range approximately 0.357 µm to 976 µm.

The following values were obtained for the test material:

- The mean diameter in volume was 213 µm.

- The mean diameter in surface was 22.8 µm.

- The particle size D(0.1) was 15.0 µm.

- The particle size D(0.5) was 163 µm.

- The particle size D(0.9) was 484 µm.

Conclusions:
The particle size distribution of the test material was found to range approximately 0.357 to 976 µm.
The following values were obtained for the test material:
- The mean diameter in volume was 213 µm.
- The mean diameter in surface was 22.8 µm.
- The particle size D(0.1) was 15.0 µm.
- The particle size D(0.5) was 163 µm.
- The particle size D(0.9) was 484 µm.
Executive summary:

The particle size of the test material was investigated in accordance with standardised guideline OECD 110 under GLP conditions using a sieve method and in accordance with CIPAC MT 187, using laser diffraction.

The particle size distribution of the test material was found to range approximately 0.357 to 976 µm.

The following values were obtained for the test material:

- The mean diameter in volume was 213 µm.

- The mean diameter in surface was 22.8 µm.

- The particle size D(0.1) was 15.0 µm.

- The particle size D(0.5) was 163 µm.

- The particle size D(0.9) was 484 µm.

Description of key information

The particle size distribution of the test material was found to range approximately 0.357 to 976 µm.

The following values were obtained for the test material:

- The mean diameter in volume was 213 µm.

- The mean diameter in surface was 22.8 µm.

- The particle size D(0.1) was 15.0 µm.

- The particle size D(0.5) was 163 µm.

- The particle size D(0.9) was 484 µm.

Additional information

The particle size of the test material was investigated in accordance with standardised guideline OECD 110 under GLP conditions using a sieve method and in accordance with CIPAC MT 187, using laser diffraction.

The particle size distribution of the test material was found to range approximately 0.357 to 976 µm.

The following values were obtained for the test material:

- The mean diameter in volume was 213 µm.

- The mean diameter in surface was 22.8 µm.

- The particle size D(0.1) was 15.0 µm.

- The particle size D(0.5) was 163 µm.

- The particle size D(0.9) was 484 µm.