Registration Dossier

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008-05-07
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)
Deviations:
no
Principles of method if other than guideline:
The maximum diameters (fibre lengths) have been put in size classes according to the requirements of the OECD test. The minimum size of the first size class has been set to 1 μm, that deviates from the OECD requirement of 0 μm due to the reduced resolution of the light optical microscope. The minimum diameters (fibre diameters) have been put in size classes according to the requirements of the OECD test. The minimum size of the first size class has been set to 1 μm, that deviates from the OECD requirement of 0.1 μm due to the reduced resolution of the light optical microscope.
GLP compliance:
no
Type of method:
determination of fibre length and diameter distributions
Type of particle tested:
primary particle
Type of distribution:
counted distribution
Key result
Percentile:
other: length
Mean:
>= 5 - <= 10 µm
Remarks on result:
other: no SD is indicated
Key result
Percentile:
other: Diameter
Mean:
> 3 µm
Remarks on result:
other: no SD is indicated

Minimum Diameter Distribution the test item: No diameters < 3 µm were measured.

Length Distribution of the test item: The majority of particles have a length between 5 and 10 µm.

Conclusions:
Minimum Diameter Distribution of the test item: No diameters < 3 µm were measured.
Length Distribution of the test item: The majority of particles have a length between 5 and 10 µm.
Executive summary:

A study was conducted according to OECD TG 110 to determine the particle size distribution of the test item. The particle size distribution was determined the light optical microscope. The fibre length and diameter distribution was obtained by determined the maximum and minimum diameters on microscopic images of the particles observed. No diameters < 3 µm were measured (minimum diameter distribution) and the majority of the particles have a length between 5 and 10 µm (length distribution).

Description of key information

In a granulometry study no diameters < 3 µm were measured (minimum diameter distribution) and the majority of the particles have a length between 5 and 10 µm (length distribution) (reference 4.5 -1).

Additional information

A study was conducted according to OECD TG 110 to determine the particle size distribution of the test item. The particle size distribution was determined the light optical microscope. The fibre length and diameter distribution was obtained by determined the maximum and minimum diameters on microscopic images of the particles observed. No diameters < 3 µm were measured (minimum diameter distribution) and the majority of the particles have a length between 5 and 10 µm (length distribution).