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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:
19. Oct. 2006 - 20. Oct. 2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP and Guideline conform

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006
Report date:
2006

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Version / remarks:
resp. ISO 13317-2
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
Landesamt für Umweltschutz und Gewerbeaufsicht, Rheinland-Pfalz
Type of distribution:
other: fixed pipette method

Test material

Constituent 1
Chemical structure
Reference substance name:
Silicic acid, titanium salt
EC Number:
255-911-8
EC Name:
Silicic acid, titanium salt
Cas Number:
42613-21-8
Molecular formula:
TiSixOy, where x and y are unspecified.
IUPAC Name:
titanium(4+) bis(oxosilanebis(olate))
Details on test material:
- Name of test material (as cited in study report): Magnapore 963
- Physical state/appearance: black powder
- Analytical purity: 98%
- Lot/batch No.: LOT 405
- Expiration date of the lot/batch: 01.09.2007
- Production date: 01.03.2006
- Storage condition of test material: room temperature, keep dry
- Homogeneity: homogenous
- Additive: Chromium (III) hydroxide, CAS No. 1308-14-1

Results and discussion

Particle size
Percentile:
D50
Mean:
25 - 80 µm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
200.72 µm
Distribution:
97.95 %
No.:
#2
Size:
80.67 µm
Distribution:
82.46 %
No.:
#3
Size:
56.05 µm
Distribution:
55.47 %
No.:
#4
Size:
34.86 µm
Distribution:
28.99 %
No.:
#5
Size:
27.16 µm
Distribution:
11.99 %
No.:
#6
Size:
18.84 µm
Distribution:
4 %
No.:
#7
Size:
13.08 µm
Distribution:
1.5 %
No.:
#8
Size:
9.08 µm
Distribution:
0 %

Any other information on results incl. tables

All measured values show good reproducibility, giving deviations of less than 2%.

The particle size distribution shows no single peaks, but a continuous distribution roughly between 25 and 80 µm, leaving fractions of less than 20% above 80 µm and less than 10% below 25 µm.

Applicant's summary and conclusion