Registration Dossier

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:
09 February 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
NON GLP study. It was assessed that Laser scattering diffraction method is suitable to determine the distribution of particles. No information about calibration of the instrument has been reported. Test item particle size is in the applicability range of the method (0.1 - 100 microns).

Data source

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

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
The particle size distribution has been determined by a laser diffraction equipment, Malvern Masterziser.
After dissolving few grams of technical material in water the detection of particle size distribution started and recorded on a Gaussian distribution curve.
System details:
Sampler: internal
Presentation: 4OHD
Analysis model: polydisperse
Modifications: none
Particle R.I. = 1.5295, 0.10000
Dispersant R.I.= 1.3300
Measured beam obscuration 16:1%
residual: 0.187
GLP compliance:
no
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Sample name: Atrazine technical
Source: OXON Italia S.p.A.
Reference n. MB0836
Batch n. 098195235

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
18.55 µm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Percentile:
D10
Mean:
2.96 µm
Remarks on result:
other: Span = 2.417
Percentile:
D50
Mean:
18.55 µm
Remarks on result:
other: Span = 2.417
Percentile:
D90
Mean:
47.48 µm
Remarks on result:
other: Span = 2.417

Applicant's summary and conclusion