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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
Study period:
06/17-01/18
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
1981
GLP compliance:
yes (incl. certificate)
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: granular
Specific details on test material used for the study:
- Source and lot/batch No.of test material: CH1004
- Expiration date of the lot/batch: 21.3.18

Results and discussion

Mass median aerodynamic diameter:
44.26 µm
Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
5.2 µm
St. dev.:
0.1
Key result
Percentile:
D50
Mean:
41.6 µm
St. dev.:
1.38
Key result
Percentile:
D90
Mean:
220.1 µm
St. dev.:
12.9

Applicant's summary and conclusion

Conclusions:
The test item 1,1'-Azobis(cyclohexane-1-carbonitrile) has a median particle size D50= 41.6 µm, which was determined by laser diffraction measurement in accordance to ISO 13320 (2009) and OECD 110 (1981) method and a MMAD of 44.26 µm.