1,1'-azobis(1-cyclohexanecarbonitrile)

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 guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Version / remarks:

2009

Test guideline 2

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:

1981

GLP compliance:

yes (incl. QA statement)

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Test material

Test material information

Constituent 1

Reference substance name:

1,1'-azobis(1-cyclohexanecarbonitrile)

EC Number:

218-254-8

EC Name:

1,1'-azobis(1-cyclohexanecarbonitrile)

Cas Number:

2094-98-6

Molecular formula:

C14H20N4

IUPAC Name:

1,1'-azobis(1-cyclohexanecarbonitrile)

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 size

Particle size 1

Key result

Percentile:

D10

Mean:

5.2 µm

St. dev.:

0.1

Particle size 2

Key result

Percentile:

D50

Mean:

41.6 µm

St. dev.:

1.38

Particle size 3

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.