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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:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Qualifier:
according to
Guideline:
other: CIPAC MT 187
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline
Specific details on test material used for the study:
Batch number: 2015030121

Results and discussion

Mass median aerodynamic diameter:
147 µm
Particle sizeopen allclose all
Percentile:
D10
Mean:
33.7 µm
St. dev.:
0.316
Percentile:
D50
Mean:
147 µm
St. dev.:
1.35
Percentile:
D90
Mean:
324 µm
St. dev.:
1.19
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
< 45 µm
Distribution:
13.77 %
No.:
#2
Size:
> 75 µm
Distribution:
76.05 %

Any other information on results incl. tables

Results

 

The interpolated results are expressed as percent of the total results under that size.

This value is known as percentile.

The results show the percentile sizes for 10%[Dv 10 (µm)], 50%[Dv 50 ( µm)], 90% [Dv 90 ( µm)], the percentile volume under 45 µm and the percentile volume above 75 µm.

The 50% volume percentile is also known as the media of the volume distribution (in bold).

 

 

Table5 Particle size distribution by laser diffraction

 

Test No.

Dv 10 ( 

µ

m)

Dv 50 ( 

µ

m)

Dv 90 ( 

µ

m)

% Volume

under 45 µm

% Volume

above 75 µm

1

33.9

148

326

13.62

76.38

2

33.9

147

323

13.68

76.23

3

33.3

145

324

14.02

75.53

Average

33.7

147

324

13.77

76.05

Applicant's summary and conclusion

Conclusions:
Particle size distribution of the substance is the following: D10 = 33.7 μm; D50 = 147 μm; D90 = 324 μm; Volume under 45 μm = 13.77% , volume above 75 μm = 76.05 %