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Diss Factsheets

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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Justification for type of information:
Testing performed by manufacturer using recognised methods.
The substance is typically supplied in water and was dried specifically for testing.
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Principles of method if other than guideline:
Seiving methods
GLP compliance:
no
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Specific details on test material used for the study:
The substance is produced as a solution and it was dried
Batch number of test material: B-03-3173
Mass median aerodynamic diameter:
< 63 µm
Key result
Percentile:
D75
Mean:
< 63 µm
Remarks on result:
other: standard deviation not determined
No.:
#1
Size:
> 250 µm
Distribution:
ca. 3 %
No.:
#2
Size:
> 63 - < 250 µm
Distribution:
ca. 22 %
No.:
#3
Size:
< 63 µm
Distribution:
ca. 75 %

The particle size of ultra dry specifically prepared sample was found to be predominatly < 63 micron.

In reality the substance is rarely isolated from water and even then, is handled as a hygroscopic crystalling solid with no dust.

Conclusions:
The particle size of ultra dry specifically prepared sample was found to be predominatly < 63 micron.
In reality the substance is rarely isolated from water and even then, is handled as a hygroscopic crystalling solid with no dust.

Description of key information

The substance was observed to be very hygroscopic. It therefore did not retain a crystalline structure, so, in order to determine the size of the particles, the substance was further dried at 105 °C for 24 hours.

Additional information