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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:
2019-03-04 to 2019-05-14
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Principles of method if other than guideline:
- Principle of test: laser diffraction method
- Short description of test conditions: The particle size is measured by laser diffraction. The Sympatec HELOS KF determines the diffraction pattern of a laser light beam. The sample is dropped through parallel beam laser beam setup by dropping it from a dispersing unit with Sympatec VIBRI vibrating rail and pneumatic conduction with a pressure of 3.00 bar. An optical concentration of 7.53% was measured within the detector cell.
The particles pass through the laser beam. Depending on their size, diffraction takes place. A smaller particle size leads to a wide diffraction pattern, while large particles give a smaller diffraction. The laser’s diffraction pattern is detected within the device, and is used to calculate the particle size distribution.

GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Key result
Percentile:
D10
Mean:
3.06 µm
Remarks on result:
other: St. dev. was not reported
Key result
Percentile:
D50
Mean:
20.06 µm
Remarks on result:
other: St. dev. was not reported
Key result
Percentile:
D90
Mean:
68 µm
Remarks on result:
other: St. dev. was not reported
Remarks on result:
not measured/tested
Conclusions:
According to test results obtained from a study conducted similar to OECD guideline 110, the particle size of the test item was determined with the laser diffration method. The median diameter was determined to be 20.06 µm.
Executive summary:

According to test results obtained from a study conducted similar to OECD guideline 110, the particle size of the test item was determined with the laser diffration method. The median diameter was determined to be 20.06 µm.

Description of key information

Determination of particle size by laser diffraction similar to OECD guideline 110, D50 = 20.06 µm.

Additional information