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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: CIPAC MT 187
Principles of method if other than guideline:
recognized international standard
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D50
Mean:
134.46 µm
Remarks on result:
other: Mean of three measurements 129.391 µm, 135.130 µm and 138.871 µm
Percentile:
D10
Mean:
11.02 µm
Remarks on result:
other: Mean of three measurements 10.464 µm, 11.154 µm and 11.456 µm
Percentile:
D90
Mean:
351.11 µm
Remarks on result:
other: Mean of three measurements 346.163 µm, 351.574 µm and 355.589 µm

Applicant's summary and conclusion

Conclusions:
The L10 D (v, 0.1) was determined to be 11.02 µm, the L50 D (v, 0.5) was determined to be 134.46 µm and the L90 D (v, 0.9) was determined to be 351.11 µm.
The test item contains many particles >> 2 mm that are already retained in the primary screen (1.6 mm) and can’t be dispersed.