Registration Dossier

Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:

Data source

Materials and methods

Results and discussion

Particle size
Percentile:
D50
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.

Applicant's summary and conclusion

Conclusions:
In accordance with REACH Chapter R.7A Endpoint Specific Guidance, specifically R.7.1.14.1 Information requirements on granulometry, the granulometry study does not need to be conducted as the substance is marketed or used in a granular form. The substance is isolated by spray drying into the composite microgranular form. As such, the particle size is not a function of the chemical but a function of the spray dryer used; a typical particle size distribution for reactive dyes isolated as low dust granules is as follows:
10% < 123 µm; 25% < 159 µm; 50% < 207 µm; 75% < 266 µm; 90% < 326 µm
Executive summary:

In accordance with REACH Chapter R.7A Endpoint Specific Guidance, specifically R.7.1.14.1 Information requirements on granulometry, the granulometry study does not need to be conducted as the substance is marketed or used in a granular form. The substance is isolated by spray drying into the composite microgranular form. As such, the particle size is not a function of the chemical but a function of the spray dryer used; a typical particle size distribution for reactive dyes isolated as low dust granules is as follows:

10% < 123 µm; 25% < 159 µm; 50% < 207 µm; 75% < 266 µm; 90% < 326 µm