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:
4 November 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Qualifier:
according to
Guideline:
other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction
GLP compliance:
yes (incl. certificate)
Remarks:
Hess, Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
Laser scattering/diffraction
Type of particle tested:
agglomerate
Type of distribution:
volumetric distribution
Key result
Percentile:
D50
Mean:
10.6 µm
Remarks on result:
other: no St. dev reported
Key result
Percentile:
D10
Mean:
0.9 µm
Remarks on result:
other: no St. dev reported
Key result
Percentile:
D90
Mean:
228.1 µm
Remarks on result:
other: no St. dev reported

The mass median aerodynamic diameter (MMAD) can be calculated as:

 

MMAD = D50 * sqrt(relative density)

 

The relative density of the test item, technical purity is

 

D420= 1.47

 

Therefore the MMAD can be calculated as

 

MMAD = 10.6 µm * sqrt(1.47) = 12.85 µm

Description of key information

median particle size L50 = 10.6 µm

particle size L10 = 0.9 µm

particle size L90 = 228.1 µm

(CIPAC MT 187, laser diffraction)

Additional information

The mass median aerodynamic diameter was calculared to be: MMAD = 12.85 µm