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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 June 2017 to 16 June 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Qualifier:
according to
Guideline:
other: CIPAC MT 187 (CTL SOP No. 417)
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Remarks:
small volume (wet) module (SVM) with kerosene as the dispersant
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline
Details on test material:
Appearance: Yellow crystalline powder
Test item storage: At room temperature
Stable under storage conditions until: 01 February 2018 (expiry date)
Specific details on test material used for the study:
density 1.29 g/cm3

Results and discussion

Mass median aerodynamic diameter:
194.631 µm
Geometric standard deviation:
>= 2.784 - <= 2.866
Remarks on result:
other: GSD calculated from d50/d15.78
Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
35.789 µm
St. dev.:
0.533
Key result
Percentile:
D50
Mean:
171.363 µm
St. dev.:
1.094
Key result
Percentile:
D90
Mean:
377.026 µm
St. dev.:
5.013

Any other information on results incl. tables

 

RUN 1

RUN 2

RUN 3

RUN 4

RUN 5

Average**

Volume weighted mean

191.772

194.590

189.310

193.971

194.387

192.806

Median

171.125

171.700

169.381

172.288

172.378

171.363

Mode

217.800

216.577

216.067

217.320

219.077

217.365

MMAD*

194.361

195.014

192.380

195.682

195.784

194.631

d10-10% of material is <

35.161

36.553

35.291

36.233

35.803

35.798

d50-50% of material is <

171.125

171.700

169.381

172.288

172.378

171.363

d90-90% of material is <

374.684

382.130

368.442

379.111

381.037

377.026

All results are in µm

*Mass median aerodynamic diameter

**Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.

1.83 % by volume of sample was seen to be<10.00 µm.

 

Applicant's summary and conclusion

Conclusions:
The particle size analysis was conducted using the small volume (wet) module (SVM) with kerosene as the dispersant gave an MMAD of 194.631 µm. The volume of sample < 10.00 µm was 1.83 %

Executive summary:

The particle size analysis was conducted using the small volume (wet) module (SVM) with kerosene as the dispersant.

Particle Size Analysis using small volume (wet) module (SVM)

Average (µm)

Volume weighted mean

192.806

 Median

171.363

 Mode

 217.365

 MMAD (mass median aerodynamic diameter)

194.631

 d10 - 10 % of material is <

35.798

 d50 - 50 % of material is <

171.363

 d90 - 90 % of material is <

377.026