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Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 23 July 2010 to 24 August 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: compliant to GLP and testing guideline; adequate coherence between data, comments and conclusions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
OCDE guideline
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
other: Particle Size Distribution / Fibre Length and Diameter Distributions
Type of distribution:
volumetric distribution

Test material

Constituent 1
Reference substance name:
Copper Lead Resorcylate Salicylate Complex
EC Number:
614-455-3
Cas Number:
68411-07-4
Molecular formula:
C7H5O4-, C7H5O3- Cu , Pb
IUPAC Name:
Copper Lead Resorcylate Salicylate Complex
Details on test material:
- Name of test material (as cited in study report): LEAD-COPPER-RESORCYLATESALICYLATE (LC12-15)
- Substance type: multicontituent
- Physical state: green powder
- Composition of test material, percentage of components: 11.9% of copper, 35.7% of lead, 14.1% of resorcylate and 35.7% of salicylate
- Purity test date: 20 October 2009
- Lot/batch No.: 09/201
- Expiration date of the lot/batch: 04 November 2011
- Storage condition of test material: In darkness at room temperature

Results and discussion

Particle size
Percentile:
D50
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
<= 90 µm
Distribution:
95.5 %
No.:
#2
Size:
<= 63 µm
Distribution:
89.1 %
No.:
#3
Size:
<= 45 µm
Distribution:
83.5 %
No.:
#4
Size:
<= 32 µm
Distribution:
70.1 %
No.:
#5
Size:
<= 25 µm
Distribution:
54.4 %
No.:
#6
Size:
<= 20 µm
Distribution:
17.1 %

Any other information on results incl. tables

Preliminary dry sieving:

Ambient humidity: about 73%

Temperature: about 22°C

Mass of test item used: 115 659 g

Table 1

Test sieve

1 mm

100 µm

Collecting pan

Percentage of residue (%)

0.1

28.7

71.2

Mechanical sieving (min)

30

45

/

Manual sieving (min)

2

11

/

 Remark: The particles size was visibly lower than 25 and. So, the sieves of 25 andwere not used.

 

The majority of the particles was lower than 100 µm.So,the principal sieving was made lower than 100 µm.

Applicant's summary and conclusion

Conclusions:
The majority of the particles (71.2%) was lower than 100 μm. So, the principal sieving was made lower than 100 μm.
Only 17.1% of the particles lower than 100μm have a size lower than 20 μm.

Remark: It was useless to carry out the test CIPAC MT 187 of particle size distribution by laser diffraction as the distribution of the particles size was higher than 20 μm and no difficulties happened when running the test of particle size distribution by sieving (following OECD 110 method).