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)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Principles of method if other than guideline:
Accurately weighed a 180-µm sieve and an empty pan. Accurately weighed 10.49 g of test substance into the sieve. Place sieve and pan on a sieve shaker and shook for 10 minutes. Re-weighed the sieve and the pan. Calculated the percentage of particles that were less than 105-µm. The particles less than 105-µm were sent out to New Jersey Institute of Technology Material Characterization Laboratory for particle size distribution using a Beckman Coulter LS 230 Particle Size Analyzer.
GLP compliance:
yes
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Purity: 99.83%

Results and discussion

Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
180 µm
Distribution:
0.48 %
No.:
#2
Size:
21 µm
Distribution:
10 %
No.:
#3
Size:
17.67 µm
Distribution:
25 %
No.:
#4
Size:
10.96 µm
Distribution:
50 %
No.:
#5
Size:
6.018 µm
Distribution:
75 %
No.:
#6
Size:
3.454 µm
Distribution:
90 %

Applicant's summary and conclusion

Conclusions:
0.48% of particles were <105 µm.
Executive summary:

The particle size of the test substance was measured and the percentage of particles that were less than 105-µm was calculated. The particles less than 105 µm were sent for particle size distribution using a Beckman Coulter LS 230 Particle Size Analyzer. 0.45% of the particles were <105 µm.