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Physical & Chemical properties

Particle size distribution (Granulometry)

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Description of key information

Determination of the particle size experiment on the raw material (FAT 40863/A TE) and on the final product (trade form; FAT 40863/B TE)

Additional information

The experiment performed by Siemens, was perfomed on the final product (trade form).

The median particle size L50of the test item deduced from the particle size distributions is 235.14 µm.

The particle size L10of the test item deduced from the particle size distributions is 74.35 µm.

The particle size L90of the test item deduced from the particle size distributions is 479.48 µm.

The average cumulative partition of the particle size ≤10 µm is ≤0.5 Vol %.

The mass median aerodynamic diameter MMAD is 235.14 µm.

The geometric standard deviation GSD is 2.0 µm.

The second experiment was performed on the raw material by HARLAN on (FAT 40863/A TE)

The method used a procedure designed to be compatible with European Commission Technical Guidance Document EUR 20268 ‘Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of chemical substances’ (2002).


Particle size data acquired for the test item is shown in the following table:





Proportion of test item having an inhalable particle size <100 µm


97.4 %

Proportion of test item having a thoracic particle size <10.0 µm

Cascade Impactor

0.224 %

Proportion of test item having a respirable particle size <5.5 µm

Cascade Impactor

0.089 %