Registration Dossier

Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2011-11-16
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report Date:
2011

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Version / remarks:
, 1981
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Deviations:
no
Qualifier:
according to
Guideline:
other: ISO 13320, 2009
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
, signed 2010-08-25
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline
Details on test material:
- Physical state: solid, whitish to white crystals
- Storage condition of test material: ambient temperature, dark, dry, in original container

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
ca. 123 µm
Remarks on result:
other: estimated D50 of the total mass (55.3 % fine fraction & 44.7 % coarse fraction)(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Percentile:
D50
Mean:
ca. 123 µm
Remarks on result:
other: estimated D50 of the total mass (55.3 % fine fraction & 44.7 % coarse fraction)
Percentile:
D10
Mean:
3.37 µm
Remarks on result:
other: D10 of the fine fraction (55.3 %)
Percentile:
D50
Mean:
22.61 µm
Remarks on result:
other: D50 of the fine fraction (55.3 %)
Percentile:
D90
Mean:
102.39 µm
Remarks on result:
other: D90 of the fine fraction (55.3 %)

Any other information on results incl. tables

Particle size distribution of the fine fraction (55.3 %)

Test series 1:

D10:       3.32 µm

D50:       22.26 µm       (Median diameter)

D90:       101.70 µm

Test series 2:

D10:       3.42 µm

D50:       22.95 µm       (Median diameter)

D90:       103.07 µm

Average

D10:       3.37 µm

D50:       22.61 µm       (Median diameter)

D90:       102.39 µm

Applicant's summary and conclusion

Conclusions:
The fine fraction (55.3 %) < 2000 µm of the substance has a median particle size of D50 = 23 µm as determined by laser diffraction measurement according to OECD Guideline 110 (1981). Accounting for the coarse fraction (44.7 %), the median particle size L50 of the total mass of the substance is estimated with D50 = 123 µm.