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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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study performed from measurement of SEM pictures (N-1 and N-4) due to impossibility to perform the test according to normal standards. Information on measurements are well reported.
Qualifier:
no guideline followed
Principles of method if other than guideline:
The particle size of ZOC was determined by measurement of SEM photos (N-1 and N-4), as due to the solubility of the material wet light scattering could not be carried out. Also the brittle nature of crystalline material means that any dry flowing technique could cause particle breakdown.
GLP compliance:
no
Type of method:
other: measurement of SEM photos
Type of distribution:
counted distribution
Percentile:
D10
Mean:
83 µm
Remarks on result:
other: Standard deviation not reported
Percentile:
D50
Mean:
391 µm
Remarks on result:
other: Standard deviation not reported
Percentile:
D90
Mean:
875 µm
Remarks on result:
other: Standard deviation not reported
Conclusions:
The particle size distribution was defined as the D50 percentile and was concluded to be 391 µm. Additionally the D90 and D10 values were 875 µm and 83 µm, respectively.

Description of key information

One key study is available reporting for zirconium dichloride oxide a D50 of 391 µm. Additionally the D90 and D10 were 875 µm and 83 µm, respectively (Butler, 2010).

Additional information

The particle size of zirconium dichloride oxide was determined by measurement of SEM photos (N-1 and N-4) (Butler, 2010), as due to the solubility of the material wet light scattering could not be carried out. Also the brittle nature of crystalline material means that any dry flowing technique could cause particle breakdown.