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Physical & Chemical properties

Particle size distribution (Granulometry)

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Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
between November 2008 and August 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
Test material identity is not reported.
Qualifier:
according to guideline
Guideline:
other: CIPAC method MT 187
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
0.64 µm
St. dev.:
0.042
Remarks on result:
other: n=5
Percentile:
D50
Mean:
2.33 µm
St. dev.:
0.225
Remarks on result:
other: n=5
Percentile:
D90
Mean:
5.95 µm
St. dev.:
0.665
Remarks on result:
other: n=5
Conclusions:
10% of the particles have an average maximum size of 0.64 µm, 50% of the Ziram Phyto particle sizes have an average size smaller than 2.33 µm and 90% of the particles are measured with an average of 5.95 µm.
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
04.05.2006-13.11.2006
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: The coarse particle size distribution is not plausible given the known dustiness of the substance
Qualifier:
according to guideline
Guideline:
other: CIPAC method MT 59
Deviations:
no
Principles of method if other than guideline:
The particle size distribution of the test substance was determined by dry sieve analysis. A set of sieves was previously weighed and ordered according to their mesh number in increasing order. The following sieves were employed: 250, 150, 106, 75 and 45 µm. The test substance was weighed and quantitatively transferred to the sieves. The set of sieves was carefully agitated and brushed in horizontal and spinning movements. Sieving final point was reached when material mass variation was lower than 0.2% of sample initial mass in any of employed sieves. At the end of the process all sieves were weighed. The retained mass of each sieve was compared to sample initial mass.
GLP compliance:
yes (incl. QA statement)

The percentage of material retained in the sieve of 250 µm was higher than 98%. The accumulated percentage of the test substance mass retained was 99.9869% m/m.

Obtained results for test substance mass retained:

250 µm sieve:  98.0828% m/m

150 µm sieve:  1.7075% m/m

106 µm sieve:  0.1098% m/m

75 µm sieve:    0.0609% m/m

45 µm sieve:    0.0259% m/m

Description of key information

D10 = 0.64 µm

D50 = 2.33 µm

D90 = 5.95 µm

Additional information

Particle size distribution was measured using CIPAC Method MT187 (laser scattering).