Registration Dossier

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-01-26 through 2010-03-26
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Guideline Study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
Principles of method if other than guideline:
The purpose of this study was the determination of the particle size distribution of the test item by laser diffraction according to the European Comission Regulation (EC) No. 440/2008 and under consideration of the following guidelines:
OECD 110 (1981): Particle Size Distribution,
CIPAC MT 187: Particle Size Analysis by Laser Diffraction,
ISO 13320-1: Particle Size Analysis – Laser Diffraction Methods.
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2008-06-17
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D50
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Percentile:
D10
Mean:
2 µm
St. dev.:
0.35
Percentile:
D50
Mean:
37.9 µm
St. dev.:
0.05
Percentile:
D90
Mean:
152.7 µm
St. dev.:
0.4
Conclusions:
The median particle size D50 of the test item deduced from the particle size distributions is 37.9 µm.
The particle size D10 of the test item deduced from the particle size distributions is 2.0 µm.
The particle size D90 of the test item deduced from the particle size distributions is 152.7 µm.

Description of key information

Diarsenic trioxide is a crystalline powder. The particle size distribution of a typical commercial sample has been determined experimentally (laser diffraction method, OECD 110, GLP). The material is characterised by a median particle diameter D50 = ca. 38 µm (D10 = ca. 2 µm, D90 = ca. 153 µm).

Additional information