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Physical & Chemical properties

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:
June 7, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 59 Sieve Analysis
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 169 Tap Density of Water Dispersible Granules
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Specific details on test material used for the study:
Test Item was used in its initial form.
Mass median aerodynamic diameter:
100 - 250 µm
Percentile:
D50
Mean:
100 - 250 µm
Remarks on result:
other: sieving

DETERMINATION OF TAP DENSITY

Sample mass (W): 54.3 g

Sample volume after dropping (V): 184 ml

Tap density (D): 0.30 g/ml

SIEVE TEST

N. of sieves: 8

Sample mass (m, calculated): 47.2 g

Sample mass (weighed): 47.2 g

Sieve Residue mass gx (g) Residue rx (m/m) % Sum of residues Rx (m/m) %
Size (µm) Serial No.
<45 (receiver pan) - 0.00 0.0 99.51
45 20111588 0.05 0.1 99.51
63 20111627 4.46 9.4 99.41
100 31121141 32.27 68.4 89.96
250 20111667 8.31 8.1 21.61
500 16111554 2.55 5.4 13.54
1000 20111725 1.65

3.5

8.13

2000

24111027

1.03

2.2

4.64

4000

14111099

1.16

2.5

2.46

gx: the amount of material retained by the sieve x

rx: ratio * 100 of the amount of material retained by the sieve x and sample mass

Rx: the calculated sum of residues on all the x sieves. Therefore the residue Rx on sieve x and the residues on all coarser sieves were summed.

Conclusions:
D50: 100 - 250 µm
Executive summary:

Machine sieving test was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 100, 63 and 45 µm. The analysis has been performed according to the testing procedures described in the following guidelines: CIPAC MT 59 Sieve Analysis, CIPAC MT 170 Dry Anlysis of Water Dispersable Granules and CIPAC MT 169 Tap of Water Dispersable Granules. 

Conclusion

D50: 100 - 250 µm.

Description of key information

D50: 100 - 250 µm

Additional information

CIPAC MT 59, 170 and 169 - sieving method