Registration Dossier

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from October 3, 2007 to November 16, 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Qualifier:
according to
Guideline:
other: Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002) ISO 2591-1 Test Sieving – Part 1: Methods Using test sieves
Deviations:
no
Principles of method if other than guideline:
A single test sieve separates a particular material into two fractions, of which one is retained by the sieving medium and the other of which passes through its apertures.
GLP compliance:
yes (incl. certificate)
Type of method:
determination of fibre length and diameter distributions
Type of distribution:
counted distribution
Percentile:
D50
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
No.:
#1
Size:
> 1 400 µm
Distribution:
12.59 %
No.:
#2
Size:
> 1 000 - <= 1 400 µm
Distribution:
13.05 %
No.:
#3
Size:
> 710 - <= 1 000 µm
Distribution:
14 %
No.:
#4
Size:
> 500 - <= 710 µm
Distribution:
16.14 %
No.:
#5
Size:
> 355 - <= 500 µm
Distribution:
14.36 %
No.:
#6
Size:
> 250 - <= 355 µm
Distribution:
13.06 %
No.:
#7
Size:
> 180 - <= 250 µm
Distribution:
7.27 %
No.:
#8
Size:
> 125 - <= 180 µm
Distribution:
4.73 %
No.:
#9
Size:
> 100 - <= 125 µm
Distribution:
2.05 %
No.:
#10
Size:
> 80 - <= 100 µm
Distribution:
1.42 %
Executive summary:

The particle size distribution of the test substance was determined. The sieving method was used. The procedures used in the study were in accordance with:

Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002).

ISO 2591-1 Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate.

Particle size distribution of test substance Humic acids, potassium salts is characterized by the following table:

Nominal aperture size

(µm)

Sieve fractions

(%)

Cumulative undersize (%)

1400

12.59

87.41

1000

13.05

74.35

710

14.00

60.35

500

16.14

44.21

355

14.36

29.85

250

13.06

16.79

180

7.27

9.52

125

4.73

4.78

100

2.05

2.73

80

1.42

1.32

< 80

1.32

Description of key information

Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002). ISO 2591-1 Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate.
GLP study

Additional information

The particle size distribution of the test substance was determined. The sieving method was used. Particle size distribution of test substance Humic acids, sodium salts is characterized by the following table:

Nominal aperture size

(µm)

Sieve fractions

(%)

Cumulative undersize (%)

1400

12.59

87.41

1000

13.05

74.35

710

14.00

60.35

500

16.14

44.21

355

14.36

29.85

250

13.06

16.79

180

7.27

9.52

125

4.73

4.78

100

2.05

2.73

80

1.42

1.32

< 80

1.32