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Diss Factsheets

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:
08/02/2021
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2021

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
The Particle size distributions analysis has been made with the aid of a MALVERN MASTERSIZE mod MS2000.
On passing an expanded monochromatic laser beam through a dry sample in a non-reactive liquid, the light is diffracted and a diffraction image with radial symmetry is produced on the focal plane of the lens.
The intensity of the light rings is directly proportional to the number of particles seen with the beam of light and the radius of the rings is inversely proportional to the diameter of the particles.
The process of sample measurement involves recording the scattering pattern produced as the sample passes through the path of the laser. An initial background measurement captures scattering from the cell windows, any contaminant present and, in the case of wet measurement, the pure dispersant.
The sample was dispersing in water and placed in the Hydro 2000 SM accessory.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
other: Not specified
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
Hexachloroethane
EC Number:
200-666-4
EC Name:
Hexachloroethane
Cas Number:
67-72-1
Molecular formula:
C2Cl6
IUPAC Name:
hexachloroethane
Test material form:
solid: crystalline

Results and discussion

Particle size
Key result
Percentile:
other: D[4,3]
Mean:
269.343 µm
Remarks on result:
other: volume weighted mean
Particle size distribution at different passagesopen allclose all
No.:
#2
Size:
208.25 µm
Distribution:
< 50 %
No.:
#1
Size:
< 45 µm
Distribution:
< 3.6 %

Applicant's summary and conclusion

Conclusions:
The volume weighted mean D[4,3] is 269 micron and the particle size distribution is listed below. As can be seen the particles below 45 micron is less than 3.6 %.
Executive summary:

The Particle size distributions analysis has been made with the aid of a MALVERN MASTERSIZE mod MS2000.


The sample was dispersing in water and placed in the Hydro 2000 SM accessory.


The volume weighted mean D[4,3] is 269 micron and the particle size distribution is listed below. As can be seen the particles below 45 micron is less than 3.6 %.