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Physical & Chemical properties

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:
09 May 2018
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Mass median aerodynamic diameter:
15.8 µm
Key result
Percentile:
D50
Mean:
15.8 µm
Remarks on result:
other: Standard deviation not reported
No.:
#1
Size:
<= 4 µm
Distribution:
12.8 %
No.:
#2
Size:
<= 12 µm
Distribution:
39.4 %
No.:
#3
Size:
<= 128 µm
Distribution:
100 %

Table 1: Measured Values

D

T (%)

1

004.0

1.5

004.7

2

006.4

3

009.3

4

012.8

6

019.1

8

026.5

12

039.4

16

050.5

24

065.6

32

077.4

48

092.4

64

096.4

96

098.8

128

100.0

192

100.0
Conclusions:
Under the conditions of this study, the median particle size was determined to be 15.8 microns in a range of 1 to 192 microns.
Executive summary:

The particle size distribution of the test material was investigated in accordance with the standardised guideline OECD 110, using later scattering.

Under the conditions of this study, the median particle size was determined to be 015.8 microns in a range of 1 to 192 microns.

Description of key information

Doetschel (2018)

Under the conditions of this study, the median particle size was determined to be 15.8 microns in a range of 1 to 192 microns.

Additional information

Doetschel (2018)

The particle size distribution of the test material was investigated in accordance with the standardised guideline OECD 110, using later scattering. The study was awarded a reliability score of 2 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of this study, the median particle size was determined to be 015.8 microns in a range of 1 to 192 microns.

Miller (2018)

The particle size distribution of the test material was investigated, testing was conducted with a Coulter Counter using a universal liquid module. Sample preparation was prediluted in isopropanol and sonicated for 1 minute prior to analysis.

Under the conditions of this study, the average particle size distribution has been determined to be:

< 2 microns 5.83 %

2 to 200 microns 94.06 %

> 200 microns 0.11 %.