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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:
14 Sept to 23 Sept 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
GLP compliance:
yes (incl. QA statement)
Remarks:
Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
3.9 µm
Remarks on result:
other: no Standard deviation given
Percentile:
D50
Mean:
21.1 µm
Remarks on result:
other: no Standard deviation given
Percentile:
D90
Mean:
72 µm
Remarks on result:
other: no Standard deviation given

Results

Particle Size Distribution

Two test series of 3 measurements each were performed with the fine fraction of the test item.

Table: results of two test series

Distribution

Test series 1

Test series 2

Average

D10

3.9 µm

2.9 µm

3.9 µm

D50

21.0 µm

21.2 µm

21.1 µm

D90

72.2 µm

71.7 µm

72.0 µm

 

The test item dehydroactic acid sodium salt has a median particle size D50 = 21.1 µm.

Description of key information

The substance dehydroacetic acid sodium salt has a median particle size D50 = 21.1 µm (OECD 110, laser diffraction).

Additional information