Registration Dossier
Registration Dossier
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EC number: 269-103-8 | CAS number: 68187-51-9 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77496.
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study meets generally accepted scientific principles
- Principles of method if other than guideline:
- REM
- GLP compliance:
- not specified
- Type of distribution:
- counted distribution
- Percentile:
- D50
- Mean:
- 1 µm
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 0.5 µm
- Percentile:
- D50
- Mean:
- 1 µm
- St. dev.:
- 4
- Percentile:
- D90
- Mean:
- 3.4 µm
- Executive summary:
The median particle size of Zinc ferrite was 1µm (Currenta 2008).
Reference
It is not unlikely that shear forces affected particle size.
The method does not allow detection of particles smaller than 0.4 µm. The detection limit is 0.4 µm.The percentage refers to the detectable fraction.
Description of key information
The test material zinc ferrite is not considered as nanomaterial, as 11 +/- 1.2% of all particles of the test material based on equivalent circle diameter (ECD) are between 1 nm and 100 nm.
Additional information
Zinc ferrite is not a nanomaterial, according to the EU recommendation of the definition of a nanomaterial 2011/696/EU, Official Journal of the European Union. The particle size distribution was determined by Image Analysis in accordance with the Council Regulation (EC JRC73260, nanomaterial). The test method is in all essential parts identical with the OECD Guideline, Test no. 110, method B.
Definition:
"Nanomaterial means a natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and where for 50% or more of the particles in the number size distribution, one or more external dimension is in the size range 1 nm - 100 nm."
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