reaction mass of cerium(IV)oxide, praseodymium(III,IV)oxide and zirconium (IV)oxide

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

15 December 2016

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

no guideline followed

Principles of method if other than guideline:

Within this study, the distribution of sizes of the particles within the sample has been studied using Microtrac-X100 equipment (laser diffraction).

GLP compliance:

not specified

Type of method:

Laser scattering/diffraction

Type of distribution:

volumetric distribution

Key result

Percentile:

D10

Mean:

0.879 µm

Remarks on result:

other: SD not reported

Key result

Percentile:

D50

Mean:

2.24 µm

Remarks on result:

other: SD not reported

Key result

Percentile:

D90

Mean:

6.757 µm

Remarks on result:

other: SD not reported

MV (Mean diameter in microns of the “volume distribution”): 3.207 µm

MN (Mean diameter, in microns, of the “number distribution"): 0.946 µm

MA (Mean diameter, in microns, of the “area distribution”): 1.753 µm

CS - Calculated surface: 3.422 m2/cc

SD – Standard deviation: 2.392

Conclusions:

The median particle size (D50) was determined to be 2.240 µm, whereas the D10 and D90 were determined to be 0.879 and 6.757 µm, respectively. These values can be considered representative for the granular forms.

Description of key information

In an in-house study of MEL Chemicals (Klimisch 2), performed using Microtrac-X100 laser diffraction equipment, the median particle size of a representative sample was determined to be 2.240 µm, whereas the D10 and D90 were determined to be 0.879 and 6.757 µm, respectively.