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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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
The particle size distribution was performed by weighing sieves with defined mesh numbers before and after the sieving process.
GLP compliance:
not specified
Type of method:
sieving
Type of particle tested:
aggregate
Type of distribution:
mass based distribution
Key result
Percentile:
D50
Mean:
ca. 125 - ca. 250 µm
Remarks on result:
other: The median particle size is for the substance as received
Percentile:
D50
Mean:
ca. 63 - ca. 90 µm
Remarks on result:
other: The median particle size is for the substance as milled

Particle size analysis

Test substance as received

Sieve size (µm)

Weight on sieve (g)

% by weight

>2000

0.0

0.0

>1000

0.0

0.0

>500

0.2

0.1

>250

1.3

0.5

>125

226.5

78.9

>90

45.8

15.9

>63

8.9

3.1

>38

1.5

0.5

Receiver

3.0

1.0

 

Median particle size is 125 to 250 µm

Test substance (milled)

Sieve size (µm)

Weight on sieve (g)

% by weight

>2000

2.7

1.4

>1000

4.2

2.2

>500

3.8

2.0

>250

6.3

3.4

>125

19.6

10.5

>90

14.4

7.7

>63

54.6

29.2

>38

56.3

30.1

Receiver

25.0

13.4

 

Median particle size is 63 to 90 µm

Conclusions:
Median particle size of 125 - 250 µm was determined for the substance as received, which is relevant for the substance as placed on the market, using a relevant test method. The result is considered to be reliable.

Description of key information

Granulometry: Median particle size: 125 - 250 µm (sieve method)

Additional information

A median particle size in the range of 125 - 250 µm is using a sieve method is determined for the submission substance as received, which is relevant for the substance as placed on the market. The result is considered to be reliable.