Registration Dossier

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-03-22
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 A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
12 May 1981
Deviations:
no
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
6.82 µm
St. dev.:
0.07
Key result
Percentile:
D50
Mean:
50.28 µm
St. dev.:
0.5
Percentile:
D90
Mean:
209.93 µm
St. dev.:
1.26

Table 1: Particle Size Distribution

 

Measurement 1

[µm]

Measurement 2

[µm]

Average

[µm]

L10D(v, 0.1)

6.892

6.750

6.82

L50D(v, 0.5)

50.783

49.771

50.28

L90D(v, 0.9)

211.190

208.675

209.93

Table 2: Distribution in Fractions

Fraction

[µm]

Measurement 1

[%]

Measurement 2

[%]

Average

[%]

Up to 2 µm

2.20

2.28

2.2

2 -200 µm

86.69

86.85

86.8

Over 200 µm

11.14

10.85

11.0

 

Conclusions:
The median mass diameter of the test item was determined to be 50.28 µm.
Executive summary:

The particle size distribution was determined using the laser diffraction method with dry dispersion. The particle size distribution of the test item was determined following OECD 110. The dispersing energy was adjusted to 3 bar, the feed rate was 35 %. Two measurements have been performed. The L10 D (v, 0.1) was determined to be 6.82 µm, the L50 D (v, 0.5) was determined to be 50.28 µm and the L90 D (v, 0.9) was determined to be 209.93 µm. 2.2 % of the total sample volume consisted out of particles which were smaller than 2 µm, 86.8 % of the sample volume consisted of particles with sizes between 2 and 200 µm and 11.0 % of the sample volume consisted out of particles larger than 200 µm.

Description of key information

The median mass diameter of the test item was determined to be 50.28 µm (reference 4.5 -1).

Additional information

The particle size distribution was determined using the laser diffraction method with dry dispersion. The particle size distribution of the test item was determined following OECD 110. The dispersing energy was adjusted to 3 bar, the feed rate was 35 %. Two measurements have been performed. The L10 D (v, 0.1) was determined to be 6.82 µm, the L50 D (v, 0.5) was determined to be 50.28 µm and the L90 D (v, 0.9) was determined to be 209.93 µm. 2.2 % of the total sample volume consisted out of particles which were smaller than 2 µm, 86.8 % of the sample volume consisted of particles with sizes between 2 and 200 µm and 11.0 % of the sample volume consisted out of particles larger than 200 µm.