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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:
2 September 2010 - 28 October 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 59
GLP compliance:
yes
Type of method:
determination of fibre length and diameter distributions
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
4-amino-2-methylpyrimidine-5-methylamine
EC Number:
202-384-7
EC Name:
4-amino-2-methylpyrimidine-5-methylamine
Cas Number:
95-02-3
Molecular formula:
C6H10N4
IUPAC Name:
5-(aminomethyl)-2-methylpyrimidin-4-amine
Details on test material:
- Name of test material (as cited in study report): Grewe-diamin
- Physical state: solid

Results and discussion

Mass median aerodynamic diameter:
ca. 6 050 µm
Particle sizeopen allclose all
Key result
Percentile:
D50
Mean:
6 050 µm
St. dev.:
0
Key result
Percentile:
D10
Mean:
3 500 µm
St. dev.:
0
Key result
Percentile:
D90
Mean:
9 100 µm
St. dev.:
0
Particle size distribution at different passages
No.:
#1
Size:
ca. 4 000 µm
Distribution:
ca. 87.2 %

Any other information on results incl. tables

See attachment

Applicant's summary and conclusion

Conclusions:
The median particle size Lso of the test item deduced from the particle size distributions is
approximately 6050 um.
The median particle size L10 of the test item deduced from the particle size distributions is
approximately 3500 um.
The median particle size Leo of the test item deduced from the particle size distributions is
approximately 9100 um.

Overall conclusion:
The sieving is restricted to the selected sieves which have certain separation efficiency and are
limited in their number. However for median particle sizes larger 2000 um the laser diffraction can
not be used anymore.
Executive summary:

Due to the high concentration of coarse particles of the test item, these particles were separated by sieving the product with different sieves.

The median particle size L50 of the test items deduced from the particle size distributions is 6050 um.

The particle size L10 of the test items deduced from the particle size distributions is 3500 um.

The particle size L90 of the test items deduced from the particle size distributions is 9100 um