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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-03-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
1981
Deviations:
no
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
2017-02-28
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Specific details on test material used for the study:
Storage conditions: Ambient temperature, dry, tightly closed in original container
Remarks on result:
not measured/tested
Percentile:
D10
Mean:
27.6 µm
St. dev.:
0.14
Key result
Percentile:
D50
Mean:
181.6 µm
St. dev.:
3.32
Percentile:
D90
Mean:
439.4 µm
St. dev.:
6.93

Two test series consisting of 3 measurements each were performed with the test item.

Test serie 1:

- D10:      27.5 µm

- D50:      179.3 µm       (Median diameter)

- D90:      434.5 µm  

Test serie 2:

- D10:      27.7 µm

- D50:      184.0 µm       (Median diameter)

- D90:      444.3 µm  

Average:

- D10:      27.6 µm

- D50:      181.6 µm       (Median diameter)

- D90:      439.4 µm

The test item lead di(acetate) trihydrate has a median particle size D50 = 182 µm, which was determined by laser diffraction measurement in accordance to inter alia ISO 13320 (2009) and CIPAC MT 187 (2009) method.

Conclusions:
The test item lead di(acetate) trihydrate has a median particle size D50 = 182 µm, which was determined by laser diffraction measurement in accordance to inter alia ISO 13320 (2009) and CIPAC MT 187 (2009) method.

Description of key information

The test item lead di(acetate) trihydrate has a median particle size D50 = 182 µm, which was determined by laser diffraction measurement in accordance to inter alia ISO 13320 (2009) and CIPAC MT 187 (2009) method.

Additional information

The substance as manufactured and marked is the lead di(acetate) trihydrate. The registrant tried to produce lead di(acetate), unhydrous for REACH purposes but without success. The lead di(acetate) decomposes during the drying process. Hence, the results for lead di(acetate) trihydrate are regarded as key information.