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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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
Test material was sieved in an alpine air jet sieving machine.
GLP compliance:
no
Type of method:
sieving
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.
No.:
#1
Size:
< 45 µm
Distribution:
ca. 50 %
Conclusions:
The substance is considered to pose an inhalation risk (as a significant number of particles are present at <100µm in diameter).
This study is considered to be appropriate and reliable for use as a key study in accordance with Regulation (EC) No. 1907/2006 (REACH). No further testing is required.

Description of key information

One key study exists. This study is considered to be scientifically justified for use as a key study.

Additional information

Particle size distribution indicates the substance is an inhalation risk (a significant proportion of the particles are present at < 100 µm).