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Particle size distribution (Granulometry)

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particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From December 20th, 2017 to January 02nd, 2018
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
other: CIPAC MT 59, “Dry Sieve test”
GLP compliance:
yes (incl. QA statement)
Type of method:
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Specific details on test material used for the study:
The test item was used in its initial form, without any pre-treatment.
420 - 850 µm
Remarks on result:
other: 90.05 % of particles have a size higher than 105 µm

Determination of particle size distribution

Sieve size (µm) Weight of test item (g) Material passed through sieve Residue (Rx) % 
dx, g Percentage ( %)
2812 10.0054 9.1778 91.73 8.27
850 10.0533 6.8761 68.4 31.6
420 10.0124 4.753 47.47 52.53
150 10.0203 1.2976 12.95 87.05
105 10.0015 0.9954 9.95 90.05
D50: 420 - 850 µm
Executive summary:

The dry sieve test of test item was determined as per CIPAC MT 59, “Dry Sieve test”. The dry sieve test with the test item was carried out in single replicate.

The sieve with 105 µm size retained more than 90 % of the total test item particles; the sieve with 2812 µm size retained less than 10 % of the particles. The median of particle size (D50) resulted to be between 420 and 850 µm.


D50: 420 - 850 µm

Description of key information

D50: 420 - 850 µm

Additional information

CIPAC MT 59 - Dry sieve test