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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 187
Deviations:
no
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Mass median aerodynamic diameter:
217 µm
Key result
Percentile:
D10
Mean:
53 µm
St. dev.:
6
Key result
Percentile:
D50
Mean:
217 µm
St. dev.:
1
Key result
Percentile:
D90
Mean:
439 µm
St. dev.:
8

A sample labelled B was analysed but not reported since the test item had agglomerated on analysis.

Conclusions:
The test substance was determined to have d(0.1), d(0.5) and d(0.9) values of 53, 217 and 439 μm, respectively.
Executive summary:

A study was conducted to determine the particle size distribution of the test substance in accordance with guidelines to meet the requirements of European Regulation (EC) No. 1107/2009, and the US EPA Office of Chemical Safety and Pollution Prevention (OCSPP), Series 830: Product Properties Test Guidelines. The particle size distribution was assessed using a technique based on laser diffraction in accordance with CIPAC MT 187. The test substance was determined to have d(0.1), d(0.5) and d(0.9) values of 53, 217 and 439 μm, respectively. d(0.1) is the diameter where 90% of the distribution is above and 10% is below. d(0.5) is the diameter where 50% of the distribution is above and 50% is below. The is referred to as the Mass Median Diameter (MMD). d(0.9) is the diameter where 10% of the distribution is above and 90% is below.

Description of key information

ISO 13320

Additional information

The test substance was determined to have d(0.1), d(0.5) and d(0.9) values of 53, 217 and 439 μm, respectively.