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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
September 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study performed according to international guideline. No deficiencies. Performed under internal quality management system.
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: ISO 2591-1, Test sieving – Part 1: Methods using test sieves of woven wire cloth and perforated metal plate, December 1988
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: ISO 3310-1, Test sieves – Technical requirements and testing – Part 1: Test sieves of metal wire cloth, July 1990
GLP compliance:
no
Type of method:
determination of fibre length and diameter distributions
Type of distribution:
volumetric distribution
Key result
Percentile:
D10
Mean:
2.2 µm
St. dev.:
0.1
Remarks on result:
other: Sieve result: >100 21.7% , < 100µm 78.3% . This fraction <100µm is used for determination of the following particle size distribution.
Key result
Percentile:
D50
Mean:
17.3 µm
St. dev.:
0.6
Remarks on result:
other: Sieve result: >100 21.7% , < 100µm 78.3% . This fraction <100µm is used for determination of the following particle size distribution.
Key result
Percentile:
D90
Mean:
74 µm
St. dev.:
4
Remarks on result:
other: Sieve result: >100 21.7% , < 100µm 78.3% . This fraction <100µm is used for determination of the following particle size distribution.
No.:
#1
Size:
< 10 µm
Distribution:
1.6 %
No.:
#2
Size:
> 10 - < 50 µm
Distribution:
11.9 %
No.:
#3
Size:
> 50 - < 90 µm
Distribution:
44.4 %
No.:
#4
Size:
> 90 - < 100 µm
Distribution:
20.4 %
No.:
#5
Size:
> 100 µm
Distribution:
21.7 %

Light microscopic examinations show that Potassium chlorate is a very fine powder. The shape of the crystals is non-fibrous.

Conclusions:
3811-04-9,KClO4,
Light microscopic examination revealed that the Potassium chlorate sample contained a significantly amount of fine powder and no fibres.
This observation is confirmed by sieving the sample over a 100 µm sieve. The majority of the product (78.3 m/m %) appeared to be < 100 µm.
The characteristics of the PSD of the fraction < 100 µm are:

Characteristics of the PSD
d10 : 2.2 µm
d50 : 17.3 µm
d90 : 74 µm

Description of key information

3811-04-9,KClO4,


Light microscopic examination revealed that the Potassium chlorate sample contained a significantly amount of fine powder and no fibres.


This observation is confirmed by sieving the sample over a 100 µm sieve. The majority of the product (78.3 m/m %) appeared to be < 100µm .


The characteristics of the PSD of the fraction < 100 µm are:


 


Characteristics of the PSD


d10       2.2 µm


d50       17.3 µm


d90       74 µm

Additional information