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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:
2016-03-11
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187
Principles of method if other than guideline:
recognized international standard
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
2.5 µm
Remarks on result:
other: Mean of two measurements 2.470 µm and 2.545 µm
Key result
Percentile:
D50
Mean:
17 µm
Remarks on result:
other: Mean of two measurements 16.684 µm and 17.377 µm
Percentile:
D90
Mean:
78.4 µm
Remarks on result:
other: Mean of two measurements 76.122 µm and 80.762 µm

Table 1: Particle Size Distribution

 

Measurement 1 [µm]

Measurement 2 [µm]

Average [µm]

L10 D (v, 0.1)

2.470

2.545

2.5

L50 D (v, 0.5)

16.684

17.377

17.0

L90 D (v, 0.9)

76.122

80.762

78.4

 

Conclusions:
The L10 D (v, 0.1) was determined to be 2.5 µm, the L50 D (v, 0.5) was determined to be 17.0 µm and the L90 D (v, 0.9) was determined to be 78.4 µm.
Executive summary:

The L10 D (v, 0.1) was determined to be 2.5 µm, the MMAD L50 D (v, 0.5) was determined to be 17.0 µm and the L90 D (v, 0.9) was determined to be 78.4 µm by Laser Diffraction method according to the national standard method (CIPAC MT 187) .

Description of key information

The L10 D (v, 0.1) was determined to be 2.5 µm, the MMAD L50 D (v, 0.5) was determined to be 17.0 µm and the L90 D (v, 0.9) was determined to be 78.4 µm by Laser Diffraction method according to the national standard method (CIPAC MT 187) .

Additional information

Based on the result of the median particle size L50(D(v, 0.5) (50% of particle volume or particle mass with lower particle diameter) of 17 µm the dustiness category of 'medium dusty form' of solids was selected in the Chesar tool in accordance with the modelECETOC TRA Worker 3.0 tool and the ECETOC Technical Report No. 114 considering a worst case approach.