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Particle size distribution (Granulometry)

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Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Justification for type of information:
Technical data obtained through valid experimental methods, and held by the manufacturer. Practical handling experience has not resulted in the questioning of the accuracy of this data.
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Principles of method if other than guideline:
Seive
GLP compliance:
no
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:
Lot 48657.
Key result
Percentile:
D95
Mean:
99.68 other: % excluded from filtering through 106 micron mesh
St. dev.:
0
Remarks on result:
other: no data
Remarks:
no data on standard deviation
No.:
#1
Size:
>= 1 400 µm
Distribution:
79.53 %
No.:
#2
Size:
>= 1 000 µm
Distribution:
84.59 %
No.:
#3
Size:
>= 850 µm
Distribution:
86.76 %
No.:
#4
Size:
>= 106
Distribution:
>= 98.55 - <= 99.68 %
Remarks on result:
other: Exclusion % = 99.68

99.68% of particles were excluded from filtering through 106 micron mesh.

Conclusions:
Molecular sizing of the solid particles of the test substance was investigated using the seive method. The fraction of material with particle size greater than 100 microns is 99.68%.
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Justification for type of information:
Technical data obtained through valid experimental methods, and held by the manufacturer. Practical handling experience has not resulted in the questioning of the accuracy of this data.
Qualifier:
equivalent or similar to
Guideline:
other: ASTM 11:61
Principles of method if other than guideline:
Seive sizing of solid particles with Malvern apparatus
GLP compliance:
no
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:
Lot 48657.
Key result
Percentile:
D95
Mean:
697.922 µm
St. dev.:
0
Remarks on result:
other: no data
Remarks:
no data on standard deviation
Percentile:
D50
Mean:
270.582 µm
St. dev.:
0
Remarks on result:
other: no data on standard deviation
Percentile:
D10
Mean:
76.072 µm
St. dev.:
0
Remarks on result:
other: no data on standard deviation

50% were 270.6 microns. Only 10% were 76.072 microns or smaller.

Detailed Findings:

Concentration: 0.2007 %

Span: 2.298

Uniformity 0.709

Specific surface area: 0.0519 m2/g

Weighted surface mean D[3,2]: 115.548 microns

Vol. Weighted meanD[4,3]: 339.436 microns

Density: 1.000 g/cm2

Conclusions:
Molecular sizing of the solid particles of the test substance was investigated using a Malvern particle sizer. The fraction of material with particle size greater than 100 microns is 15.11%. The DT50 was 271 microns, the DT10 was 76 microns.

Description of key information

99% of particles are larger than 100 µm.

Additional information

Particle size of solid showed 99.7% was larger than 100 µm using a manual seive; the average size of those less than 1000 µm (15%) was 271 µm, as examined in a Malvern particle sizer.