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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

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particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
no guideline followed
Principles of method if other than guideline:
Test material was sieved in an alpine air jet sieving machine.
GLP compliance:
Type of method:
Type of distribution:
volumetric distribution
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
< 45 µm
ca. 50 %
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 acceptable and to adequately satisfy both the guideline requirement and the regulatory requirement as a key study for this endpoint.

Description of key information

Two studies exist (company test data and MMAD as reported in an inhalation study). The company data has been selected as a key study as this is most representative of the substance that is placed on the market.

Additional information

Ca. 50% of the particles were found to be <45µm.