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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:
06 March 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
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 Disperse Granules
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
sieving
Type of distribution:
mass based distribution
Remarks on result:
not measured/tested
No.:
#1
Size:
63 µm
Distribution:
52.3 %
Remarks on result:
other: Sum of residues % (Rx)
No.:
#2
Size:
125 µm
Distribution:
10.1 %
Remarks on result:
other: Sum of residues % (Rx)
No.:
#3
Size:
250 µm
Distribution:
3.5 %
Remarks on result:
other: Sum of residues % (Rx)
No.:
#4
Size:
500 µm
Distribution:
1.2 %
Remarks on result:
other: Sum of residues % (Rx)
No.:
#5
Size:
1 000 µm
Distribution:
0.4 %
Remarks on result:
other: Sum of residues % (Rx)
No.:
#6
Size:
2 000 µm
Distribution:
0.2 %
Remarks on result:
other: Sum of residues % (Rx)
No.:
#7
Size:
4 000 µm
Distribution:
0 %
Remarks on result:
other: Sum of residues % (Rx)

Table 1. Tap Density Determination (CIPAC MT 169)

Sample mass (W)

80.0 g

Sample volume after dropping (V)

153 mL

Tap density (D)

0.52 g/mL

Table 2. Sieve Test (CIPAC MT 170)

Sieve No.

Sieve Size

(µm)

Residue mass gx

(g)

Residue rx

%

Sum of residues Rx

%

1

63

30.9

42.2

52.3

2

125

4.8

6.6

10.1

3

250

1.7

2.3

3.5

4

500

0.7

0.9

1.2

5

1000

0.1

0.2

0.4

6

2000

0.1

0.2

0.2

7

4000

0

0.0

0.0

Number of sieves (n): 7

Sample mass (calculated): 73.2 g

Samples mass (m): 73.2 g

Conclusions:
Under the conditions of the test the tap density of the test material was determined to be 0.52 g/mL and the particle size distribution was found to be <63 μm; 250 μm.
Executive summary:

The particle size of the test material was determined in a GLP study conducted in line with the following guidelines, CIPAC MT 169 (Tap Density of Water Disperse Granules) and CIPAC MT 170 (Dry Sieve Analysis of Water Dispersible Granules).

The tap density of the test material was determined to be 0.52 g/mL. The sample mass for the sieve test was calculated (73.2 g) and the machine sieving was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 125, 63 μm. The particle size distribution of the test material was found to be <63 μm to 250 μm, under the conditions of this study.

Description of key information

Tap Density: 0.52 g/mL, CIPAC MT 169 (Tap Density of Water Disperse Granules), Sárvári (2013a).

Particle size distribution: <63 μm; 250 μm, CIPAC MT 170 (Dry Sieve Analysis of Water Dispersible Granules), Sárvári (2013a).

Additional information

In the key study (Sárvári, 2013a) the particle size of the test material was determined in a GLP study conducted in line with the following guidelines, CIPAC MT 169 (Tap Density of Water Disperse Granules) and CIPAC MT 170 (Dry Sieve Analysis of Water Dispersible Granules).

The tap density of the test material was determined to be 0.52 g/mL. The sample mass for the sieve test was calculated (73.2 g) and the machine sieving was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 125, 63 μm. The particle size distribution of the test material was found to be <63 μm to 250 μm, under the conditions of this study.