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:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of distribution:
other: not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
ca. 1.95 µm
Distribution:
ca. 4.4 %
No.:
#2
Size:
ca. 38.15 µm
Distribution:
ca. 60.4 %
No.:
#3
Size:
ca. 969.34 µm
Distribution:
ca. 35 %

Any other information on results incl. tables

Using abinocular magnifier, the substance was visually confirmedas being a powder, not a fiber.

Three measurements were performed under water medium.

The following results were obtained:

This particle size distribution has the following properties:

-    Per cent of particles with diameter ≤ 2 μm : 2.56 %

-    Per cent of particles with diameter ≥ 200 μm : 40.73 %

-    Per cent of particles with 2 μm ≤ diameter ≤ 200 μm : 56.72 %

 

Applicant's summary and conclusion

Conclusions:
The particle size distribution of the test item 1,4 DIBROMONAPHTHALENE has been determined and the following results were obtained:
-2.56 % of particles own a diameter under 2 µm.
-56.72 % of particles own a diameter between 2 µm and 200 µm.
-40.73 % of particles own a diameter over 200 µm.