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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:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
according to ISO 13320 (2009): Particle size analysis - Laser diffraction methods
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
6-methylbenzotriazole
EC Number:
205-265-8
EC Name:
6-methylbenzotriazole
Cas Number:
136-85-6
Molecular formula:
C7H7N3
IUPAC Name:
6-methylbenzotriazole
Test material form:
solid
Specific details on test material used for the study:
Batch number: N6A3I
Expiry date: August 4, 2022

Results and discussion

Mass median aerodynamic diameter:
ca. 30.8 µm
Particle size
Key result
Percentile:
D50
Mean:
ca. 30.8 µm
St. dev.:
0.37
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
ca. 7.8 µm
Distribution:
ca. 10 %
No.:
#2
Size:
ca. 30.8 µm
Distribution:
ca. 50 %
No.:
#3
Size:
ca. 992.4 µm
Distribution:
ca. 90 %

Applicant's summary and conclusion

Conclusions:
The test item 5-Methyl-1H-benzotriazole has a median particle size D50 = 30.8 um, which was determined by laser diffraction measurement according to OECD test Guideline 110, ISO 13320 and EPA OCSPP guideline 830.7520.