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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:
2012-09-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Version / remarks:
, 1981
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Version / remarks:
, 1996
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: ISO 13320: Particle size analysis – Laser diffraction methods
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D50
Mean:
27 µm
Remarks on result:
other: mean of six measurements(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Percentile:
D10
Mean:
4.99 µm
St. dev.:
0.16
Remarks on result:
other: mean of six measurements
Percentile:
D50
Mean:
26.75 µm
St. dev.:
2.09
Remarks on result:
other: mean of six measurements
Percentile:
D90
Mean:
82.21 µm
St. dev.:
11.51
Remarks on result:
other: mean of six measurements
Two test series of three measurements each were performed with the fine fraction of the test item Test series 1:               
 L10 5.10 µm
 L50 28.22 µm     (Median diameter)       
 L90 90.35 µm
Test series 2:
 L10   4.88 µm
 L50 25.27 µm  (Median diameter)
L90 74.07 µm
Average:
L10 4.99 µm 
 L50 26.75 µm      (Median diameter)
 L90 82.21µm 

The additional sieve analysis showed a coarse fraction (agglomerates) of the test item of 16.16 wt.-% with particle sizes > 2000 µm. 5.37 wt.-% of the particles were > 4000 µm.

Conclusions:
The test item Zirconium 2-ethylhexanoate has a median particle size after sieving in the laser apparatus with 2000 µm sieve of L50 = 27 µm, which was determined by laser diffraction measurement.

Description of key information

2-ethylhexanoic acid, zirconium salt has a median particle size after sieving in the laser apparatus with 2000 µm sieve of D50 = 27 µm, which was determined by laser diffraction measurement.
D10 = 4.99 µm
D50 = 26.75 µm 
D90 = 82.21 µm

Additional information